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  • 151.
    Qi, Zhang
    et al.
    Academy of China Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Ge, Wang
    Academy of China Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Li
    Academy of China Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Siyuan, Chen
    Academy of China Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Study on the Implementation Pathways and Key Impacts of RPS Target in China using a Dynamic Game-Theoretical Equilibrium Power Market Model2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 3844-3849Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    China's 2020 Renewable Portfolio Standards (RPS) target has been published by the government in early 2016. In the present study, in order to find its implementation pathways and estimate the key impacts of PRS target out to 2030, a multi-region power market model is proposed to investigate different RPS policy scenarios. Results show that RPS policy can promote the development of renewable energy efficiently, and Renewable Energy Certification (REC) trade can reduce the cost of electricity generated from renewable energy. However, a national wide free REC trade tends to result in a dilemma that renewable energy will be developed centralizedly in regions where the renewable resource is plenty. Therefore, detailed REC trade regulations need to be developed from more comprehensive viewpoints when adopting RPS policy. 

  • 152.
    Qi, Zhang
    et al.
    China University of Petroleum, Beijing, China.
    Ge, Wang
    China University of Petroleum, Beijing, China.
    Yan, Li
    China University of Petroleum, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för innovation, design och teknik. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Benjamin, McLellan
    Kyoto University, Japan.
    Siyuan, Chen
    China University of Petroleum, Beijing, China.
    Substitution effect of renewable portfolio standards and renewable energy certificate trading for feed-in tariff2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 227, s. 426-435Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The Feed-in Tariff (FIT) has been successfully used to promote the development of renewable energy; nevertheless, it may cause financial burden on the governments at the same time. Compared with FIT, Renewable Portfolio Standards (RPS) and the Renewable Energy Certificate (REC) trading have been considered to reduce the government's expenditure caused by the subsidization. To examine the effectiveness of RPS and REC trading, the development of renewable energy and the environmental and economic benefits under different policies have been quantitatively investigated by using a multi-region power market model and China has been chosen as a case study. The obtained results show that: (i) REC trading can efficiently reduce the government's expenditure on subsidies for the development of renewable energy; (ii) Compared to FIT, RPS and REC trading will reduce the power sectors' profit; and (iii) RPS and REC trading may not be enough to achieve the target on renewable energy especially when the capital cost is high, therefore, RPS, REC trade and FIT subsidy should be implemented as complementary policies, not independent.

  • 153.
    Qinxing, Wang
    et al.
    Shandong University, China..
    Nianzhi, Huang
    Shandong University, China.
    Haiyang, Lin
    Shandong University, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Ronald, Wennersten
    Shandong University, China.
    Qie, Sun
    Shandong University, China.
    Potential of energy saving in a data center – application of an agent-based modelling2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 3903-3908Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Conventional approaches for modelling energy consumption for data center are limited to deal with the randomness, emergence and interdependence in energy systems. To fill the gap, an agent-based method was proposed and implemented to simulate the electricity consumption of a data center and to explore the potential of energy saving. The study found that a large amount of energy can be saved by dynamically operating the cooling load according to the practical load of the servers, namely 13% of the total energy consumption can be saved in the dynamic energy saving case (DESC) and 17% in the enhanced dynamic energy saving case (EDESC). The power usage effectiveness (PUE) of the data center can decrease from 1.71 in the original situation to 1.49 in the DESC and 1.42 in the EDESC. By contrast, the frequency of data backup has a heavy impact on the electricity consumption of the data center, while the frequency of computing tasks do not. 

  • 154.
    Quitoras, M. R.
    et al.
    University of Victoria, Victoria, Canada.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Crawford, C.
    University of Victoria, Victoria, Canada.
    Exploring electricity generation alternatives for Canadian Arctic communities using a multi-objective genetic algorithm approach2020Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 210, artikel-id 112471Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Indigenous peoples in the Northern communities of Canada are experiencing some of the worst catastrophic effects of climate change, given the Arctic region is warming twice as fast as the rest of the world. Paradoxically, this increasing temperature can be attributed to fossil fuel-based power generation on which the North is almost totally reliant. At the moment, diesel is the primary source of electricity for majority of Arctic communities. In addition to greenhouse gas and other airborne pollutants, this situation exposes risk of oil spills during fuel transport and storage. Moreover, shipping fuel is expensive and ice roads are harder to maintain as temperatures rise. As a result, Northern governments are burdened by rising fuel prices and increased supply volatility. In an effort to reduce diesel dependence, the multi-objective microgrid optimization model was built in this work to handle the complex trade-offs of designing energy system for an Arctic environment and other remote communities. The tool uses a genetic algorithm to simultaneously minimize levelised cost of energy and fuel consumption of the microgrid system through dynamic simulations. Component submodel simulation results were validated against an industry and academic accepted energy modeling tool. Compared to previous energy modeling platforms, proposed method is novel in considering Pareto front trade-offs between conflicting design objectives to better support practitioners and policy makers. The functionality of the method was demonstrated with a case study on Sachs Harbour, in the Northernmost region of the Northwest Territories. The algorithm selected a fully hybrid wind-solar-battery-diesel system as the most suited technically, economically and environmentally for the community. The robustness of the results was assessed by performing system failure analysis of the model results. Overall, the modeling framework can help decision makers in identifying trade-offs in energy policy to transition the Canadian Arctic and other remote communities towards more sustainable and clean sources of energy.

  • 155. Rui, Xiong
    et al.
    Li, Hailong
    Mälardalens högskola, Akademin för innovation, design och teknik. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Xuan, Zhou
    Advanced Energy Storage Technologies and Their Applications (AESA2017)2017Ingår i: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, nr 9Artikel i tidskrift (Refereegranskat)
  • 156.
    Salman, Chaudhary Awais
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Schwede, Sebastian
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH.
    Identification of thermochemical pathways for the energy and nutrient recovery from digested sludge in wastewater treatment plants2019Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 1317-1322Konferensbidrag (Refereegranskat)
    Abstract [en]

    There are several restrictions and limitations on the emissions and disposal of materials and pollutants related to wastewater treatment plants (WWTPs) emphasizing improvement of current processes and development of new methods. Process integration is one way to use all fractions of waste for improved efficiency. WWTPs produces sludge which is usually anaerobically digested to produce biogas and a byproduct called digestate. Digestate is an organic material that contains macro and micronutrients such as nitrogen, phosphorous, and potassium and also contains heavy metals. Digestate is mainly used for agricultural applications because of the presence of nutrients. However, digestate also contains energy in the form of carbon and hydrogen which can be harnessed through various processes and integrated with nitrogen recovery process. This study aims to recover the energy and nutrients from digestate through thermochemical treatment processes. Combustion, pyrolysis, and gasification are assessed and compared in this work. An ammonia stripping method is assumed to recover nitrogen from digestate. The thermochemical processes are heat integrated with ammonia stripping through modeling and simulation. Results show that almost half of the energy present in digested sludge is required for its drying. Moreover, nitrogen recovery also requires much energy. The combustion and gasification of digested sludge give better results than pyrolysis. The heat integration becomes feasible when the auxiliary biogas is also burned along with products from the thermochemical treatment of sludge.

  • 157.
    Sandberg, Alexander
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Maher, Azaza
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    An analyze of long-term hourly district heat demand forecasting of a commercial building using neural networks2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, s. 3784-3790Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    With the building sector standing for a major part of the world's energy usage it of utmost importance to develop new ways of reduce the consumption in the sector. This paper discusses the evolution of the regulations and policies of the Swedish electric and district heating metering markets followed by the development of a nonlinear autoregressive neural network with external input (NARX), with the purpose of performing heat demand forecasts for a commercial building in Sweden. The model contains 13 input parameters including; calendar, weather, energy and social behavior parameters. The result revealed that these input parameters can predict the building heat demand to 96% accuracy on an hourly basis for the period of a whole year. Further analysis of the result indicates that the current data resolution of the district heat measuring system limits the future possibilities for services compared to the electric metering system. This is something to consider when new regulation and policies is formulated in the future.

  • 158.
    Shengchun, L.
    et al.
    Tianjin Key Laboratory of Refrigeration Technology, School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, China.
    Xueqiang, L.
    School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
    Mengjie, S.
    Department of Human and Engineered Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Key Laboratory of Refrigeration Technology, School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, China.
    Zhili, S.
    ianjin Key Laboratory of Refrigeration Technology, School of Mechanical Engineering, Tianjin University of Commerce, Tianjin, China.
    Experimental investigation on drying performance of an existed enclosed fixed frequency air source heat pump drying system2018Ingår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 130, s. 735-744Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    As the quick development of industry drying technology, different heat pump drying systems were proposed in recent decades. Enclosed heat pump drying system was considered as the most widely used system. For an existed enclosed fixed frequency heat pump drying system, drying time could be decreased by increasing air temperature at inlet of drying chamber. However, as a fundamental problem, system drying performance influenced by air flow ratio was not tested and reported in open literatures. Therefore, basing on adding an air bypass duct, drying performance of an enclosed system was experimental investigated in this study, with 15 mm thickness fresh carrot chips used. Furthermore, qualitatively and quantitatively comparisons and discussions on experimental results were conducted. A whole drying process were firstly divided into three stages by different water content ratios, preheating stage at 98–100%, fast drying stage at 20–98%, and later drying stage at 0–20%, respectively. For the inlet air temperature of drying chamber is fixed at 40 °C, material drying time for water content ratio reaching 20% could be effectively decreased as much as 42 min, or 15.0%, by the strategy of hot air bypassed. After the drying time shortened, the calculated energy consumption for compressor was also decreased from 4.27 kWh for AFR at 1.0 to 3.63 kWh for AFR at 0.6. Contributions of this study can guide low temperature material drying process. Clearly, system control optimization and energy saving were both expected.

  • 159.
    Shengchun, Liu
    et al.
    The University of Tokyo, Chiba, Japan.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin University of Commerce, Tianjin, China.
    Song, Mengjie
    Nanyang Technological University, Singapore.
    Dai, Baomin
    Tianjin University of Commerce, Tianjin, China.
    Sun, Zhili
    Tianjin University of Commerce, Tianjin, China.
    Impacts on the solidification of water on plate surface for cold energy storage using ice slurry2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 227, s. 284-293Artikel i tidskrift (Refereegranskat)
  • 160.
    Shinde, Amar Mohan
    et al.
    Indian Inst Technol, Ctr Environm Sci & Engn, Bombay, Maharashtra, India..
    Dikshit, Anil Kumar
    Indian Inst Technol, Ctr Environm Sci & Engn, Bombay, Maharashtra, India..
    Singh, Rajesh Kumar
    Thinkstep Sustainabil Solut Pvt Ltd, Bombay, Maharashtra, India..
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Life cycle analysis based comprehensive environmental performance evaluation of Mumbai Suburban Railway, India2018Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 188, s. 989-1003Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Suburban railway systems are recognized as one of the most promising options to improve the environmental footprint of urban passenger transport in developing countries. In the present study, life cycle assessment has been performed for the Mumbai Suburban Railway with the objective of developing a comprehensive methodology for environmental evaluation of suburban railway projects in terms of energy consumption and relevant impact categories. The system boundary comprises the construction and maintenance of railway infrastructure such as tracks, power supply installations, foot over bridges and platforms, in addition to manufacturing, maintenance and operation phase of Electric Multiple Unit (EMU). The functional unit identified for this study is per Passenger Kilometer Travelled within a service lifetime of EMU of 25 years. The results show that operation phase is the main contributor (87-94%) to the total environmental impact, whereas the contribution of remaining life cycle phases is relatively insignificant (6-13%). It is mainly due to electricity production from non-renewable sources in India. The material and energy intensive rails entail the major contribution to construction phase (24-57%) and maintenance phase (46-71%), whereas the contribution from fastenings, ballast and on-site energy consumption is less significant. The increasing utilization of renewable energy, lightweighting of coach bodies, enhancing the service life and reuse potential of rails and fastenings and enhancing train occupancy are fundamental to accomplish suburban railways as a clean transportation mode. This comprehensive study can serve as a preeminent support and benchmark for the future environmental performance assessments of public transportation in India. Eventually, decision makers and regional transport planners can more effectively craft the strategic decisions and priorities of measures for providing sustainable mobility options.

  • 161.
    Siyuan, C.
    et al.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Qi, Z.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Yanyan, T.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Boyu, L.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Investment strategy for shallow geothermal resource based on real option model2019Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 6118-6125Konferensbidrag (Refereegranskat)
    Abstract [en]

    Shallow geothermal resource has been considered as a new and promising form for clean heating in some areas in China, such as Xiong'an New Area. In this paper, a real option model is established to explore the optimal investment timing and investment scale of shallow geothermal resources. According to numerical results, we found that in the reference scenario the critical value of marginal revenue is 4.30 yuan / m 2 , and the optimal investment scale is 1.28 million square meters. Simultaneously, the investors are advised to invest after 1.05 years and they will get the unit investment return of 39.34 yuan / m 2

  • 162.
    Song, C.
    et al.
    Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China.
    Liu, Q.
    Tianjin University, 92 Weijin Road, Nankai District, Tianjin, China.
    Deng, S.
    Ministry of Education, Tianjin, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Kitamura, Y.
    University of Tsukuba, Japan.
    Cryogenic-based CO2 capture technologies: State-of-the-art developments and current challenges2019Ingår i: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 101, s. 265-278Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 capture, utilization and storage has been recognized as a primary option to mitigate the issue of climate change caused by the utilization of fossil fuels. Several CO2 capture strategies have been developed, such as absorption, adsorption, membrane, chemical looping, hydrating and biofixation. Among different technologies, particular attention has been given to cryogenic CO2 capture by phase change. The aim of this study is to improve interest in cryogenic technologies for CO2 capture by providing an overview of the actual status of CCS. To reach this goal, the major strategies and technologies for CO2 capture from fossil fuel combustion have been reviewed. Simultaneously, the characteristics of cryogenic technologies for CO2 capture are summarized. The existing challenges that need to be overcome in cryogenic technology include cold energy sources, capture costs and impurities, etc. Finally, opportunities for the future development of cryogenic-based technologies are discussed. The results of this investigation indicated that cryogenic CO2 capture processes can be easily retrofitted to the existing industrial emission facilities and avoid the challenges associated with chemical solvents or physical sorbents. 

  • 163.
    Song, C.
    et al.
    Tianjin University, Tianjin, China.
    Liu, Q.
    Tianjin University, Tianjin, China.
    Ji, N.
    Tianjin University, Tianjin, China.
    Deng, S.
    Ministry of Education, Tianjin, China.
    Zhao, J.
    Ministry of Education, Tianjin, China.
    Li, Y.
    Chinese Academy of Sciences, Tianjin, China.
    Song, Y.
    Tianjin University, Tianjin, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Alternative pathways for efficient CO2 capture by hybrid processes—A review2018Ingår i: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 82, s. 215-231Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 capture and storage technologies have been recognized as the primary option to mitigate the issue of climate change caused by the utilization of fossil fuels. In the last decades, several CO2 capture approaches have been developed, such as absorption, adsorption, membrane, cryogenic, hydrate and chemical looping combustion etc. However, the energy penalty is a general challenge for each technology. To overcome the disadvantages of standalone technology, the combination of two or more approaches (namely hybrid CO2 capture processes) has been considered as a potential option. In this work, the status and development of hybrid CO2 capture processes is presented in a classification of primary technology as absorption-based, adsorption-based, membrane-based and cryogenic-based. The detail configuration of each hybrid process is introduced. Simultaneously, the characteristics, advantages and potential challenges of each hybrid process are also summarized. Compared to the standalone methods, hybrid processes showed the superiority not only in CO2 recovery and energy penalty, but also in the installation investment. Therefore, hybrid processes can be a promising alternative to conventional CO2 capture technologies in future.

  • 164.
    Song, Jingjing
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Cost comparison between district heating and alternatives during the price model restructuring process2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 3922-3927Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    District heating (DH) has been considered as a resource- and cost-efficient way of supplying heat and a promising method to mitigate climate change, yet it also facing growing competition from alternative technical solutions, such as heat pumps. Many DH companies are under price model restructuring process to enhance their competitiveness. This study investigated the competitiveness of DH among users which would encounter significant cost increase during the price model restructuring process through comparing the cost of different DH price models with three alternative technical solutions. The result shows that for the invested DH user, instead of DH, the most economic preferable choice is to install ground source heat pump combining with direct electrical heating.

  • 165.
    Song, Jingjing
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    District heating cost fluctuation caused by price model shift2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 194, s. 715-724Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    District heating companies are facing multiple challenges nowadays, including increased investment and maintenance cost and critique from customers regarding opaque price model. Hence there is an urgent need to develop new price models. In this paper, a survey was carried out and identified four basic components in the price model. Three price models that represent the current situation and future trend have been extracted from the survey as well. Based on those price models, investigation was performed to study the impacts of different components in price models on customers’ cost. The result shows that customers with flatter consumption profiles can benefit from the price model that has a higher share of load demand component and use consumers’ real-time consumption data for charging. On the contrary, when a price model that has a higher share of energy component is adopted, customers with flatter consumption profiles may experience an increase in the cost.  

  • 166.
    Song, Jingjing
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Effectiveness of introducing heat storage to repress cost increase2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    District heating companies have been adapting their price models to reflect the changes in production cost caused by penetration of renewable fuels, and promote the applications of energy conservation measures that benefit the system efficiency. One of the approaches is to introduce a peak demand component in the price model, which has been proved to be effective to benefit users with lower peak demand. Whereas, this approach also significantly increase the cost for users with high peak demand. One of the measures that could help with high peak demand is installing energy storage on the demand side. In order to understand how the energy storage could change the users’ cost and help DH users to make informed decision, this study analyses the economic benefits of demand-side heat storage, namely if installing low-investment, low-tech, short-term hot-water storage on demand side could effectively repress the cost increase caused by new price models. Five types of building are considered here: multifamily house, commercial building, hospital and social services, industrial building, and office and school. One user of each type, whose costs increased the most during the price model transition process have been included. The result shows that heat storage could efficiently repress the cost increase, and all the investments will be paid back within 3 years, which means introducing heat storage is an efficient measure for cost saving under the circumstances.

  • 167.
    Song, Jingjing
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Karlsson, Björn
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Price models of district heating in Sweden2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 88, s. 100-105Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Traditional pricing scheme of district heating is based on previous experience of system operation. This strategy does not work well under the circumstances of decreasing demand and shifting consumption pattern. Therefore new pricing strategies are needed. To have a comprehensive view on existing price models in Sweden, a price model survey was carried out among all members of the district heating quality system REKO. Four basic price components and multiple variants of them are detected in the survey. The result also shows that most of the district heating companies still use traditional methods and do not consider their customers’ consumption pattern while charging them.

  • 168.
    Stangeland, Kristian
    et al.
    University of Stavanger, Stavanger, Norway.
    Kalai, Dori
    University of Stavanger, Stavanger, Norway.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yu, Zhixin
    University of Stavanger, Stavanger, Norway.
    CO 2 Methanation: The Effect of Catalysts and Reaction Conditions2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 2022-2027Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Great attention has been paid to develop non-fossil fuel energy sources to reduce carbon emissions and create a sustainable energy system for the future. Storing the intermittent energy is one of the challenges related to electricity production from renewable energy resources. The Sabatier reaction produces methane from carbon dioxide and hydrogen, with the latter produced by electrolysis. Methane could be stored and transported through the natural gas infrastructure already in place, and be a viable option for renewable energy storage. Current technology for biogas upgrading focuses on removing carbon dioxide from the biogas. However, the biogas could potentially be used directly as feed gas for the Sabatier reaction, thereby removing the cost associated with carbon dioxide removal and increasing the methane yield and carbon utilization from biological sources. Carbon dioxide methanation requires a catalyst to be active at relatively low temperatures and selective towards methane. Nickel based catalyst are most widely investigated, and commercial catalysts are typically nickel on alumina support. Focus on catalyst development for carbon dioxide methanation is predominantly related to support modification, promoter addition, as well as utilizing new class of materials such as hydrotalcite-derived catalysts.

  • 169.
    Stangeland, Kristian
    et al.
    University of Stavanger, Stavanger, Norway..
    Kalai, Dori
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yu, Zhixin
    The effect of temperature and initial methane concentration on carbon dioxide methanation on Ni based catalysts2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 2016-2021Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A series of Ni based catalysts prepared by incipient wetness method were characterized by chemisorption and studied for CO2 methanation. Ru had apparently a positive effect on the active metal surface area, and thus the catalytic activity. The CO2 conversion was greatly affected by temperature where the conversion ranged from 12%-85% at temperatures of 300 to 400 oC on the 12% Ni/Al2O3 catalyst. At 350 oC, higher Ni loading resulted in increased activity. The incorporation of 0.5% Ru lead to a drastic increase in catalytic activity, which can be explained by increased reducibility and a synergetic effect between Ni and Ru, and was further enhanced by increased Ni loading. Addition of CH4 at twice the initial concentration of CO2 to the feed gas mixture was found to decrease the conversion from 52% to 48% at 350 oC on the 20% Ni/Al2O3 catalyst, whereas only a slight reduction in selectivity was observed. The results preliminary demonstrate that high methane purity can be achieved from a biogas feed stream over Ni based catalysts. 

  • 170.
    Stangeland, Kristian
    et al.
    University of Stavanger.
    Kalai, Dori Yosef
    University of Stavanger.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yu, Zhixin
    Universitetet i Stavanger.
    Active and stable Ni based catalysts and processes for biogas upgrading: The effect of temperature and initial methane concentration on CO2 methanation2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 227, s. 206-212Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 hydrogenation to methane (CO2 methanation) is gaining increasing interest as a major chemical synthesis process for chemical storage of fluctuating renewable energy and producing synthetic natural gas by providing an effective process for biogas upgrading. In this study, a series of 12 and 20 wt% Ni/Al2O3 catalysts, either unpromoted or promoted by 0.5 wt% Ru, were prepared by the incipient wetness method for the CO2 methanation reaction from a feed of pure CO2 or biogas. The catalysts were characterized by N-2 physisorption, XRD, TPR and H-2 chemisorption. The activity for the 12 wt% Ni catalyst increased continuously in the temperature range from 250 degrees C to 400 degrees C. Increasing the Ni loading and Ru promotion greatly improved the activity of the catalyst. At 350 degrees C, the highest CO2 conversion of 82% and CH4 selectivity of 100% was achieved over the 20Ni0.5Ru/Al2O3 catalyst. Thereafter, methanation of a simulated biogas mixture was investigated over the 20Ni/Al2O3 and 20Ni0.5Ru/Al2O3 catalysts. The results showed that the CO2 conversion and CH4 selectivity were only mildly affected by the feed composition. Furthermore, the stability of the catalysts was similar regardless of the feed composition. This study demonstrates that high purity CH4 can be achieved from a biogas feed over our Ni based catalysts.

  • 171.
    Stangeland, Kristian
    et al.
    University of Stavanger.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yu, Zhixin
    Universitetet i Stavanger.
    Thermodynamic Analysis of Chemical and Phase Equilibria in CO2 Hydrogenation to Methanol, Dimethyl Ether, and Higher Alcohols2018Ingår i: Industrial & Engineering Chemistry Research, ISSN 0888-5885, E-ISSN 1520-5045, Vol. 57, nr 11, s. 4081-4094Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 hydrogenation can lead to the formation of various products, of which methanol, dimethyl ether (DME) and ethanol have received great attention. In this study, a comprehensive thermodynamic analysis of CO2 hydrogenation in binary (methanol/CO) and ternary product systems (methanol/CO with DME or ethanol) is conducted in Aspen Plus by the Gibbs free energy minimization method combined with phase equilibrium calculations. It is demonstrated that product condensation can be utilized to circumvent thermodynamic restrictions on product yield. Significant improvements in CO2 conversion can be achieved by operating at conditions favorable for product condensation, whereas the selectivity is mildly affected. The relevance of the results herein is discussed with regards to recent advances in catalysis and process design for CO2 hydrogenation. Our study highlights the importance of obtaining a thorough understanding of the thermodynamics of CO2 hydrogenation processes, which will be critical for developing potential breakthrough technology applicable at the industrial scale.

  • 172.
    Starfelt, Fredrik
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Tomas Aparicio, Elena
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dotzauer, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Integration of torrefaction in CHP plants - A case study2015Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 90, s. 427-435Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Torrefied biomass shows characteristics that resemble those of coal. Therefore, torrefied biomass can be co-combusted with coal in existing coal mills and burners. This paper presents simulation results of a case study where a torrefaction reactor was integrated in an existing combined heat and power plant and sized to replace 25%, 50%, 75% or 100% of the fossil coal in one of the boilers. The simulations show that a torrefaction reactor can be integrated with existing plants without compromising heat or electricity production. Economic and sensitivity analysis show that the additional cost for integrating a torrefaction reactor is low which means that with an emission allowance cost of 37 €/ton CO2, the proposed integrated system can be profitable and use 100% renewable fuels. The development of subsidies will affect the process economy. The determinant parameters are electricity and fuel prices.

  • 173.
    Su, Difei
    et al.
    China Univ Petr, Peoples R China.
    Zhang, Qi
    China Univ Petr, Peoples R China.
    Wang, Ge
    China Univ Petr, Peoples R China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Market Analysis of Natural Gas for District Heating in China2015Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 75, s. 2713-2717Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Natural gas (NG) is expected to be used broadly in China to replace coal in district heating sector in order to reduce air pollution due to coal burning. However, it is difficult for natural gas to penetrate district heating market due to its relatively high cost. In the present study, a market simulation method is proposed to find the marginal conditions and policy to promote natural gas utilization for district heating. In the proposed method, technology improvement, pricing mechanism, carbon tax and user's pricing response are considered. The prerequisite of the market simulation is that the heating expenses of end-users won't increase and the benefit of heat producers won't decrease when using NG to replace coal. Based on the obtained analysis results, gas pricing revolution, heating pricing revolution and carbon tax mechanism are discussed in order to promote the gas-fired heating through market mechanism.

  • 174.
    Sun, Q.
    et al.
    Shandong University, Jinan, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Ma, Z.
    Beijing University of Posts and Telecommunications, Beijing, China.
    Wang, C.
    Tongji University, Shanghai, China.
    Campillo, Javier
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, Q.
    China University of Petroleum, Beijing, China.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Guo, J.
    Beijing University of Posts and Telecommunications, Beijing, China.
    A Comprehensive Review of Smart Energy Meters in Intelligent Energy Networks2016Ingår i: IEEE Internet of Things Journal, ISSN 2327-4662, Vol. 3, nr 4, s. 464-479, artikel-id 7365417Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The significant increase in energy consumption and the rapid development of renewable energy, such as solar power and wind power, have brought huge challenges to energy security and the environment, which, in the meantime, stimulate the development of energy networks toward a more intelligent direction. Smart meters are the most fundamental components in the intelligent energy networks (IENs). In addition to measuring energy flows, smart energy meters can exchange the information on energy consumption and the status of energy networks between utility companies and consumers. Furthermore, smart energy meters can also be used to monitor and control home appliances and other devices according to the individual consumer's instruction. This paper systematically reviews the development and deployment of smart energy meters, including smart electricity meters, smart heat meters, and smart gas meters. By examining various functions and applications of smart energy meters, as well as associated benefits and costs, this paper provides insights and guidelines regarding the future development of smart meters. 

  • 175.
    Sun, Q.
    et al.
    nstitute of Thermal Science and Technology, Shandong University, Jinan, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, J.
    VattenFall AB, Stockholm, Sweden.
    Liu, L.
    Royal Institute of Technology, Stockholm, Sweden.
    Yu, Z.
    University of Stavanger, Stavanger, Norway.
    Yu, X.
    East China University of Science and Technology, Shanghai, China.
    Selection of appropriate biogas upgrading technology-a review of biogas cleaning, upgrading and utilisation2015Ingår i: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 51, s. 521-532Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Biogas is experiencing a period of rapid development and biogas upgrading is attracting increasing attention. Consequently, the market for biogas upgrading is facing significant challenges in terms of energy consumption and operating costs. Selection of upgrading technology is site-specific, case-sensitive and dependent on the biogas utilisation requirements and local circumstances. Therefore, matching the technology selected for use to specific requirements is significantly important. This paper systematically reviews the state-of-the-art of biogas cleaning and upgrading technologies, including product purity and impurities, methane recovery and loss, upgrading efficiency and the investment and operating costs. In addition, the potential utilisation of biogas and the corresponding requirements on gas quality are investigated in depth. Based on the results of comparisons between the technical features of upgrading technologies, the specific requirements for different gas utilizations and the relevant investment and operating costs, recommendations are made regarding appropriate technology.

  • 176.
    Sun, Qie
    et al.
    Shandong Univ, Inst Thermal Sci & Technol, Jinan, Peoples R China..
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, Qi
    China Petr Univ Beijing, Beijing, Peoples R China..
    Marginal costs for district heating2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 104, s. 323-328Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    District Heating (DH) is facing great challenges on raising production efficiency and reducing production cost in order to improve its competence. A novel pricing mechanism is an effective instrument to promote the sustainable development of DH systems. Based on the data on the daily dynamic operation of DH systems, this work calculated the practical marginal costs of a DH system, which can serve as the basis for developing a new dynamic pricing mechanism. Two methods, namely setting the price of electricity and entropy drop method were used to allocate the fuel costs in order to calculate the variable cost of heat production. Results show that the dynamics of marginal costs can indicate the increase in the variable costs with the increase in heat production. The calculated marginal costs were further compared with real heat prices. It was found that although heat prices varied with temperature in general, it could not reflect the changes in the technology of heat production, and therefore, could not represent the practical production costs.

  • 177.
    Sun, Qie
    et al.
    Shandong Univ, Inst Thermal Sci & Technol, Jinan, Peoples R China..
    Li, Hailong
    Malardalens Univ, Sch Sustainable Dev Soc & Technol, Vasteras, Sweden..
    Xu, Bo
    Adm China Int ICT Innovat Cluster, Jinan, Peoples R China..
    Cheng, Lin
    Shandong Univ, Inst Thermal Sci & Technol, Jinan, Peoples R China..
    Wennersten, Ronald
    Shandong Univ, Inst Thermal Sci & Technol, Jinan, Peoples R China..
    Analysis of secondary energy in China's iron and steel industry - An approach of industrial metabolism2016Ingår i: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 13, nr 8, s. 793-802Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study developed a conceptual model based on the industrial metabolism approach and the generic model can be used to analyze the energy flows for the iron and steel (Is) industry. based on the general situation of china's is industry, the energy flows with the focus on secondary energy reuse were analyzed for each of the is production process. by applying the model to a china's is enterprise, it was found that corporation a recovered and reused 46.6% of its secondary energy in 2010, while there was still a large potential of secondary energy to explore, i.e. about 25.7x10(15) joule. concerning the general situation in china's is industry, over 1500x10(15) joule of secondary energy could be further recovered, without the need of technological breakthroughs or unaffordable investments.

  • 178.
    Tan, Y.
    et al.
    Royal Institute of Technology, Stockholm, Sweden.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Cryogenic technology for biogas upgrading combined with carbon capture-a review of systems and property impacts2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 142, s. 3741-3746Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    CO2 makes a major contribution to the climate change, and biomass renewable energy and carbon capture and storage (CCS) can be deployed to mitigate the CO2 emission. Cryogenic process for biogas upgrading combined with carbon capture is one of the most promising technologies. This paper reviewed the state-of-the-art of cryogenic systems for biogas upgrading combined with carbon capture, and introduced the status and progress of property impacts on the cryogenic systems with emphasize on phase equilibrium. The existing cryogenic systems can be classified as flash liquefaction system, distillation system, and liquefaction combined with desublimation system. The flash liquefaction system produces biomethane and CO2 in lower purity than the other two systems. Thermodynamic optimization on the flash liquefaction system and liquefaction combined with desublimation system should be done further, and comprehensive comparison between three cryogenic systems needs to be carried out. As to the phase equilibrium, PR EOS is safe to be used in predicting VLE and SVLE with an independent thermodynamic model describing the fugacity of the solid phase. However, the impacts of binary mixing parameter, different EOS models and mixing rules, on the performance of the cryogenic system need to be identified in the future. 

  • 179.
    Tan, Y.
    et al.
    School of Chemical Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. School of Chemical Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
    Evaluation of viscosity and thermal conductivity models for CO2 mixtures applied in CO2 cryogenic process in carbon capture and storage (CCS)2017Ingår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 123, s. 721-733Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The cryogenic process is used for CO2 purification in oxy-fuel combustion power plant, and multi-stream heat exchanger is one of the most important components. Viscosity and thermal conductivity are key transport properties in the design of plate-fin multi-stream heat exchanger. It is necessary to evaluate the impacts of viscosity and thermal conductivity models on the design of the heat exchanger. In this paper, different viscosity models and thermal conductivity models for CO2 mixtures with non-condensable impurities were first evaluated separately by comparing the calculated results with experimental data. Results show that for viscosity, the absolute average deviation of KRW model is the smallest, which is 1.3%. For thermal conductivity, model developed by Ely and Hanley, with absolute average deviation of 3.5%, is recommended. The impact of property models on the design of plate-fin multi-stream heat exchanger was also analyzed. The thermal conductivity model has a noticeable impact on the plate-fin multi-stream heat exchanger design, and the deviation in design size of heat exchanger by using different thermal conductivity models may reach up to 7.5%. The future work on how to improve the property models was discussed. © 2017 Elsevier Ltd

  • 180. Tan, Y.
    et al.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, China.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. School of Chemical Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
    Impacts of thermos-physical properties on plate-fin multi-stream heat exchanger design in cryogenic process for CO2 capture2019Ingår i: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 149, s. 1445-1453Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Oxy-fuel combustion is one of the most promising technologies for CO2 capture for power plants. In oxy-fuel combustion plants, cryogenic process can be applied for CO2 purification because the main impurities in flue gas are non-condensable gases. The multi-stream plate-fin heat exchanger is one of the most important components in the CO2 cryogenic system. In-depth understanding of the impacts of property on the heat exchanger is of importance for appropriate design. In order to investigate the impacts of properties on sizing the heat exchanger and to further identify the key properties to be prioritized for the property model development, this paper presented the design procedure for the plate-fin multi-stream heat exchanger for the CO2 cryogenic process. Sensitivity study was conducted to analyze the impacts of thermos-physical properties including density, viscosity, heat capacity and thermal conductivity. The results show that thermal conductivity has the most significant impact and hence, developing a more accurate thermal conductivity model is more important for the heat exchanger design. In addition, even though viscosity has less significant impact compared to other properties, the larger deviation range of current viscosity models may lead to higher uncertainties in volume design and annual capital cost of heat exchanger. 

  • 181.
    Tan, Y.
    et al.
    Royal Institute of Technology, Stockholm, Sweden.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Property impacts on Carbon Capture and Storage (CCS) processes: A review2016Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 118, s. 204-222Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The knowledge of thermodynamic and transport properties of CO2-mixtures is important for designing and operating different processes in carbon capture and storage systems. A literature survey was conducted to review the impact of uncertainty in thermos-physical properties on the design and operation of components and processes involved in CO2 capture, conditioning, transport and storage. According to the existing studies on property impacts, liquid phase viscosity and diffusivity as well as gas phase diffusivity significantly impact the process simulation and absorber design for chemical absorption. Moreover, the phase equilibrium is important for regenerating energy estimation. For CO2 compression and pumping processes, thermos-physical properties have more obvious impacts on pumps than on compressors. Heat capacity, density, enthalpy and entropy are the most important properties in the pumping process, whereas the compression process is more sensitive to heat capacity and compressibility. In the condensation and liquefaction process, the impacts of density, enthalpy and entropy are low on heat exchangers. For the transport process, existing studies mainly focused on property impacts on the performance of pipeline steady flow processes. Among the properties, density and heat capacity are most important. In the storage process, density and viscosity have received the most attention in property impact studies and were regarded as the most important properties in terms of storage capacity and enhanced oil recovery rate. However, for physical absorption, physical adsorption and membrane separation, there has been a knowledge gap about the property impact. In addition, due to the lack of experimental data and process complexity, little information is available about the influence of liquid phase properties on the design of the absorber and desorber for chemical absorption process. In the CO2 conditioning process, knowledge of the impacts of properties beyond density and enthalpy is insufficient. In the transport process, greater attention should focus on property impacts on transient transport processes and ship transport systems. In the storage process, additional research is required on the dispersion process in enhanced oil recovery and the dissolution process in ocean and saline aquifer storage.

  • 182.
    Tan, Yuting
    et al.
    Royal Institute of Technology, Sweden.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Sweden.
    Property Impacts on Plate-fin Multi-stream Heat Exchanger (Cold Box) Design in CO2Cryogenic Process: Part I. Heat Exchanger Modeling and Sensitivity Study2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 05, s. 4587-4594Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The multi-streamplate-finheat exchanger is one of the most important componentsin the CO2 cryogenic system. Appropriate design methodology and in-depth analysis of property on the heat exchanger are of importance. This paper, as part I of the two-paper series, presented the design procedure for the multi-stream plate-fin heat exchangerin CO2 cryogenic process. Sensitivity study was also conducted to analyze the impacts of thermos-physical properties including density, viscosity, heat capacity and thermal conductivity.

    The results show that thermal conductivity has the most significant impact and it should be prioritized to develop a more accurate thermal conductivity model for the heat exchanger design. In addition, viscosity has least significant impact but the higher uncertainty range of viscosity may lead to a higher possible deviation in volume design.

  • 183.
    Tan, Yuting
    et al.
    Royal Inst Technol, Sweden.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhao, Li
    Tianjin Univ, Peoples R China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Inst Technol, Sweden.
    Property impacts on performance of CO2 pipeline transport2015Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 75, s. 2261-2267Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Carbon Capture and Storage (CCS) is one of the most potential technologies to mitigate climate change. Using pipelines to transport CO2 from emission sources to storage sites is one of common and mature technologies. The design and operation of pipeline transport process requires careful considerations of thermo-physical properties. This paper studied the impact of properties, including density, viscosity, thermal conductivity and heat capacity, on the performance of CO2 pipeline transport. The pressure loss and temperature drop in steady state were calculated by using homogenous friction model and Sukhof temperature drop theory, respectively. The results of sensitivity study show that over-estimating density and viscosity increases the pressure loss while under-estimating of density and viscosity decreases it. Over-estimating density and heat capacity leads to lower temperature drop while underestimating of density and heat capacity result in higher temperature drop. This study suggests that the accuracy of property models for example, more accurate density model, should be developed for the CO2 transport design. 

  • 184.
    Tang, Y.
    et al.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Zhang, Q.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Y.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Liu, B.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Economic analysis on repurposed EV batteries in a distributed PV system under sharing business models2019Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 4304-4310Konferensbidrag (Refereegranskat)
    Abstract [en]

    In order to ensure the operation of distributed energy and relieve the pressure of retired EV batteries, repurposing EV batteries in energy storage for second-life use has gained increasing attentions. Considering that distributed battery storages are still not economically attractive at present, the booming of sharing economy may provide a more feasible option. Based on a non-cooperative game theoretical model, this study aims to make the economic analysis on repurposed EV batteries in a distributed PV system under sharing business models. Four scenarios were proposed, including: S1-without battery storage and without shared PV generation, S2-with battery storage and without shared PV generation, S3-with battery storage and with shared PV generation among the same type of users, as well as S4-with battery storage and with shared PV generation among different types of users. S1 is taken as a benchmark case, S2 is regarded as a traditional business model, and both S3 and S4 represent sharing business models. With a case study in Beijing, the obtained results show that: (i) sharing business models of S3 and S4, especially S4-with battery storage and with shared PV generation among different types of users, can reduce electricity expenses of the whole community; (ii) sharing business models, especially S4, can obviously enhance the PV self-consumption ratio, indicating a possible way to relieve government's financial burden of feed in tariff; (iii) sharing business models, especially S4, can also improve the economic viability of retired EV batteries significantly, which can help to promote the second-life use and provide references for setting retired EV batteries' prices.

  • 185.
    Tang, Y.
    et al.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Zhang, Q.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Y.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. China University of Petroleum-Beijing, Changping, Beijing, China.
    Pan, X.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Mclellan, B.
    Graduate School of Energy Science, Kyoto University, Japan.
    The social-economic-environmental impacts of recycling retired EV batteries under reward-penalty mechanism2019Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 251, artikel-id 113313Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    With the increasing popularity of Electric Vehicles (EVs), a large number of EV batteries are intensively reaching their end-of-life, which has posed substantial challenges in ecological protection and sustainable development. However, the traditional subsidy mechanism is not effective in the current recycling market. Moreover, it is not conducive for guiding the EV industry to reduce dependence on the governmental financial support. As the reward-penalty mechanism has been successfully applied in similar fields, such as the recycling of waste portable batteries, it is expected to become a feasible alternative policy to promote the recycling of retired EV batteries. Therefore, this study aims to investigate the social-economic-environmental impacts of recycling retired EV batteries under reward-penalty mechanisms by developing a Stackelberg game theoretical model. Three scenarios are proposed and compared: S1 no policy intervention, S2 subsidy mechanism, and S3 reward-penalty mechanism. The obtained results show that:(i) Compared with the subsidy mechanism, the reward-penalty mechanism presents greater effects on recycling rate and the social welfare; (2) Under the subsidy mechanism, consumer surplus and the profit of EV manufacturer are two main driving factors of the social welfare. Under the reward-penalty mechanism, the reduced environmental burden tends to be another key contribution; (3) A relatively low minimum recycling rate favors the environmental benefit, consumer surplus and profit of EV manufacturer, while a relatively high minimum recycling rate is beneficial to reduce both the policy implementation cost and environmental burden caused by untreated EV batteries.

  • 186.
    Tang, Y.
    et al.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Zhang, Q.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Mclellan, B.
    Graduate School of Energy Science, Kyoto University, Japan.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, China.
    Study on the impacts of sharing business models on economic performance of distributed PV-Battery systems2018Ingår i: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 161, s. 544-558Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to promote the development of energy storage industry and relieve the retirement pressure of EV batteries, the application of retired EV batteries in energy storage for second-life use has gained significant attentions. Considering that distributed battery storages are still not economically attractive enough at present, the booming of sharing economy may provide a more feasible option. Based on a non-cooperative game theoretical model, this study aims to explore the impact of sharing business models on economic performance of retired EV batteries integrated with distributed PV systems. Four scenarios were proposed, including: a traditional scenario of S1 - individual battery storages, the sharing scenarios of S2 - shared battery storage, S3 - shared PV generation, and S4 - shared battery storage and shared PV generation. Through a case study in Beijing, the obtained results show that: (i)although sharing business models may not guarantee to bring economic benefits to each individual, they can contribute to a reduction in electricity expenses of the whole community; (ii) sharing business models can enhance PV self-consumption ratio and battery utilization ratio; (iii) sharing business models can improve the NPV by 1995 RMB-6975 RMB compared to the traditional scenario.

  • 187.
    Thorin, Eva
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Li, Hailong
    Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology.
    Yan, Jinuye
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    On thermophysical properties of CO2/H2O mixtures with impurities in oxyfuel CCS systems2009Ingår i: IOP Conf. Series: Earth and Environmental Science 6 (2009), 2009Konferensbidrag (Övrigt vetenskapligt)
  • 188.
    Tian, Ruijie
    et al.
    China University of Petroleum, Beijing, China.
    Zhang, Qi
    China University of Petroleum, Beijing, China.
    Wang, G
    China University of Petroleum, Beijing, China.
    LI, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Chen, S
    China University of Petroleum, Beijing, China.
    Li, Y
    China University of Petroleum, Beijing, China.
    Tian, Y
    China University of Petroleum, Beijing, China.
    Study on the promotion of natural gas-fired electricity with energy market reform in China using a dynamic game-theoretic model2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 185, s. 1832-1839Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Natural gas-fired electricity (NGFE) has gained great attention in China recently. However, the high generation cost leads to the NGFE cannot compete economically with the coal-fired electricity (CFE) when the value of peak power and positive environment externality of NGEF are not considered. Therefore, the market reform of natural gas (NG), including price deregulation, carbon tax and environmental subsidy are of vital importance to promote the penetration of NGFE. In the present study, a dynamic game-theoretic model was developed to analyze the impacts of market reforming for natural gas on the promotion effect of NGFE, in which the hourly real-time pricing (RTP) was applied in both natural gas and electricity markets. Five scenarios were proposed with different policy combinations of pricing mechanism reform, carbon tax and environmental subsidy. Based on the analysis results, it can be concluded that (i) deregulating the NG price, imposing carbon tax and adopting environment subsidy can promote the market penetration of NGFE greatly; and (ii) the market deregulation can increases the share of NGFE to 5.49%, and imposing the carbon tax of 100RMB/tonne CO2 can raise it further to 7.66%, furthermore if the environmental subsidy of 134.3 RMB/MWh is also included, the share of NGFE can reach 15%.

  • 189.
    Tian, Z.
    et al.
    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China.
    Hao, Y.
    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China.
    Li, W.
    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH, Sweden.
    Li, H.
    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH, Sweden.
    Jin, H.
    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China.
    Integrating concentrating PVs in biogas upgrading2018Ingår i: Energy Procedia, Elsevier Ltd , 2018, s. 598-603Konferensbidrag (Refereegranskat)
    Abstract [en]

    Biogas produced from anaerobic digestion processes has been considered as an important alternative to natural gas and plays a key role in the emerging market for renewable energy. By removing CO2, biogas can be upgraded to vehicle fuel. Chemical absorption is one of the widely used upgrading technologies, which advantages include high purity and low loss of biomethane. However, chemical absorption usually suffers from the high consumption of thermal energy, which is required by the regeneration of the solvent. Aiming at achieving a more sustainable and efficient biomethane production, this work proposed a novel system, which integrate concentrating photovoltaic/thermal hybrid (C-PV/T) in the upgrading of biogas. Due to the ability to produce electricity and heat simultaneously and efficiently, C-PV/T can provide the demands of both the electricity and heat. By doing dynamic simulation of the energy production of C-PV/T, the technical feasibility of such a system is analyzed. Based on the design to meet the heat demand of solvent regeneration, without energy storage, the produced heat can cover 17% of the heat demand of the solvent regeneration, but 51.1% of the electricity demand; meanwhile, 140.3 MWh excess electricity can be sold for one year.

  • 190. Ting, Chen
    et al.
    Dongsheng, Shen
    Yiying, Jin
    Li, Hailong
    Mälardalens högskola, Akademin för innovation, design och teknik. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhixin, Yu
    Huajun, Feng
    Yuyang, Long
    Jun, Xin
    Comprehensive evaluation of environ-economic benefits of anaerobic digestion technology in an integrated food waste-based methane plant using a fuzzy mathematical model2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 208, s. 666-677Artikel i tidskrift (Refereegranskat)
  • 191.
    Tomas Aparicio, Elena
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Li, Hailong
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Starfelt, Fredrik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dynamic Simulation of Torrefaction2012Konferensbidrag (Refereegranskat)
  • 192.
    Varini, Maria
    et al.
    KTH Royal Inst Technol, Stockholm, Sweden..
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Sweden..
    Lindbergh, Goran
    KTH Royal Inst Technol, Stockholm, Sweden..
    A semi-empirical, electrochemistry-based model for Li-ion battery performance prediction over lifetime2019Ingår i: Journal of Energy Storage, E-ISSN 2352-152X, Vol. 25, artikel-id UNSP 100819Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Predicting the performance of Li-ion batteries over lifetime is necessary for design and optimal operation of integrated energy systems, as electric vehicles and energy grids. For prediction purposes, several models have been suggested in the literature, with different levels of complexity and predictability. In particular, electrochemical models suffer of high computational costs, while empirical models are deprived of physical meaning. In the present work, a semi-empirical model is suggested, holding the computational efficiency of empirical approaches (low number of fitting parameters, low-order algebraic equations), while providing insights on the processes occurring in the battery during operation. The proposed model is successfully validated on experimental battery cycles: specifically, in conditions of capacity fade > 20%, and dynamic cycling at different temperatures. A comparable performance to up-to-date empirical models is achieved both in terms of computational time, and correlation coefficient R-2. In addition, analyzing the evolution of fitting parameters as a function of cycle number allows to identify the limiting processes in the overall battery degradation for all the protocols considered. The model suggested is thus suitable for implementation in system modelling, and it can be employed as an informative tool for improved design and operational strategies.

  • 193.
    Wang, Bin
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Univ Commerce, Key Lab Refrigerat Technol Tianjin, Peoples R China..
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Univ Commerce, Key Lab Refrigerat Technol Tianjin, Peoples R China..
    Yan, Jinying
    KTH Royal Inst Technol, Stockholm, Sweden..
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Schwede, Sebastian
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhu, Kai
    Tianjin Univ Commerce, Key Lab Refrigerat Technol Tianjin, Peoples R China..
    Modelling the Quench Tower in Flue Gas Cleaning of a Waste Fueled Power Plant2018Ingår i: JOINT INTERNATIONAL CONFERENCE ON ENERGY, ECOLOGY AND ENVIRONMENT ICEEE 2018 AND ELECTRIC AND INTELLIGENT VEHICLES ICEIV 2018, DESTECH PUBLICATIONS, INC , 2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    To control the emission of pollutants in the flue gas, a separated flue gas quench was added after flue gas desulfurization and before flue gas condensation. A mathematic model was developed to simulate the heat and mass transfer in the flue gas quench. The model was validated through the comparison with measured data. Based on this model, the impacts of inlet flue gas condition and injected recycling water flow rate on the water consumption of the quench and the temperature of exit flue gas (FG) were studied. The results show that the temperature of exit FG and water consumption increased with the increase of flow rate and moisture content of FG. The temperature of exit FG increased and the water consumption decreased with the increase of droplet water diameter. The temperature of exit FG decreased and the water consumption increased with the increase of water flow rate. In order to cooled and humidified the flue gas sufficiently, the droplet diameter should be limited to 1.2 mm and the water to FG flow rate ratio (L/G) higher than 2.

  • 194.
    Wang, C.
    et al.
    Tongji University, Shanghai, China.
    Du, Y.
    Tongji University, Shanghai, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Min, G.
    University of Exeter, Exeter, United Kingdom.
    New methods for clustering district heating users based on consumption patterns2019Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 251, artikel-id 113373Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Understanding energy users’ consumption patterns benefits both utility companies and consumers as it can support improving energy management and usage strategies. The rapid deployment of smart metering facilities has enabled the analysis of consumption patterns based on high-precision real usage data. This paper investigates data-driven unsupervised learning techniques to partition district heating users into separate clusters such that users in the same cluster possess similar consumption pattern. Taking into account the characteristics of heat usage, three new approaches of extracting pattern features from consumption data are proposed. Clustering algorithms with these features are executed on a real-world district heating consumption dataset. The results can reveal typical daily consumption patterns when the consumption linearly related to ambient temperature is removed. Users with heat usages that are highly imbalanced within a certain period of time or are highly consistent with the utility heat production load can also be grouped together. Our methods can facilitate gaining better knowledge regarding the behaviors of district heating users and hence can potentially be used to formulate new pricing and energy reduction solutions.

  • 195.
    Wang, C.
    et al.
    Shandong University, China.
    He, Z.
    Shandong University, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wennerstern, R.
    Shandong University, China.
    Sun, Q.
    Shandong University, China.
    Evaluation on Performance of a Phase Change Material Based Cold Storage House2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 3947-3952Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Technology of phase change materials used in cold storage house has great potential in energy storage and cost saving under the background of peak and valley price of electricity. A kind of cold storage house based on water/ice as phase change material was set up and studied. Performance of this cold storage house was experimentally tested and numerical simulated. The results showed that water/ice is a promising material for its high latent heat density. Cold storage house with water/ice PCM shifts electricity load to off-peak load and then increase operating cost due to peak load power pricing. In addition, water/ice PCM increases the insulation effect and then reduces the cold energy needed. The payback period of water/ice PCM in a laboratory scale is about 4.1 years in this study. 

  • 196.
    Wang, F.
    et al.
    Tianjin University, Ministry of Education of China, Tianjin, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhao, J.
    Tianjin University, Ministry of Education of China, Tianjin, China.
    Deng, S.
    Tianjin University, Ministry of Education of China, Tianjin, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Technical and economic analysis of integrating low-medium temperature solar energy into power plant2016Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 112, s. 459-469Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In order to mitigate CO2 emission and improve the efficiency of the utilization of solar thermal energy (STE), solar thermal energy is proposed to be integrated into a power plant. In this paper, seven configurations were studied regarding the integration of STE. A 300 MWe subcritical coal-fired plant was selected as the reference, chemical absorption using monoethanolamine solvent was employed for CO2 capture, and parabolic trough collectors and evacuated tube collectors were used for STE collection. Both technical analysis and economic evaluation were conducted. Results show that integrating solar energy with post-combustion CO2 capture can effectively increase power generation and reduce the electrical efficiency penalty caused by CO2 capture. Among the different configurations, Config-2 and Config-6, which use medium temperature STE to replace high pressure feedwater without and with CO2 capture, show the highest net incremental solar efficiency. When building new plants, integrating solar energy can effectively reduce the levelized cost of electricity (LCOE). The lowest LCOE, 99.28 USD/MWh, results from Config-6, with a parabolic trough collector price of 185 USD/m2. When retrofitting existing power plants, Config-6 also shows the highest net present value (NPV), while Config-2 has the shortest payback time at a carbon tax of 50 USD/ton CO2. In addition, both LCOE and NPV/payback time are clearly affected by the relative solar load fraction, the price of solar thermal collectors and the carbon tax. Comparatively, the carbon tax can affect the configurations with CO2 capture more clearly than those without CO2 capture. 

  • 197.
    Wang, F.
    et al.
    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin, China.
    Zhao, J.
    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Ningbo RX New Materials Tech. Co., Ltd., Ningbo, China.
    Deng, S.
    Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin, China.
    Preliminary experimental study of post-combustion carbon capture integrated with solar thermal collectors2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 185, s. 1471-1480Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The amine-based chemical absorption for CO2 capture normally needs to extract steam from the steam turbine cycle for solvent regeneration. Integrating solar thermal energy enables the reduction of steam extraction and therefore, can reduce the energy penalty caused by CO2 capture. In this paper, a pilot system of the solar thermal energy assisted chemical absorption was built to investigate the system performance. Two types of solar thermal energy collectors, parabolic trough and linear Fresnel reflector, were tested. It was found that the values of operation parameters can meet the requirements of designed setting parameters, and the solar collectors can provide the thermal energy required by the reboiler, while its contribution was mainly determined by solar irradiation. The solvent regeneration was investigated by varying the heat input. The results show that the response time of the reboiler heat duty is longer than those of the reboiler temperature and desorber pressure. This work provides a better understanding about the overall operation and control of the system.

  • 198.
    Wang, Fu
    et al.
    Tianjin Univ, Peoples R China.
    Zhao, Jun
    Tianjin Univ, Peoples R China.
    Li, Hao
    Tianjin Univ, Peoples R China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhao, Li
    Tianjin Univ, Peoples R China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin Univ, Peoples R China; Royal Inst Technol, Stockholm, Sweden.
    Experimental study of solar assisted post-combustion carbon capture2015Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 75, s. 2246-2252Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Solar-assisted post-combustion carbon capture system is studied to compensate the energy penalty of coal-fired plant due to absorbent regeneration. The system is highly integrated with the amine-based carbon capture process coupled with solar thermal sub-system. The dynamic performance is largely affected by the variations of parameters and the fluctuations in solar collectors. An experimental facility of solar-assisted chemical absorption pilot with two types of collectors (parabolic trough and linear Fresnel) was constructed in this study. The impacts on the absorbent regeneration performance were studied on the dynamic variation of the solar heat and the operating temperature of the reboiler. The results show that an optimum ration of liquid-to-gas of 2.5-3.0 was determined at the lowest of the required regeneration energy. The study suggests that a better understanding of the key parameters associated with both capture process as well as the solar assisted sub-system if of importance for the overall operation and control.

  • 199.
    Wang, G.
    et al.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Zhang, Q.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Y.
    China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin University of Commerce, Tianjin, China.
    Policy simulation for promoting residential PV considering anecdotal information exchanges based on social network modelling2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 223, s. 1-10Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Surveys and empirical researches have revealed that the households’ perceptions of benefits play a more important role than the benefits themselves in the decision process of adopting residential photovoltaic (PV). However, it has been overlooked in previous models about the green technology diffusion. This work developed an innovation diffusion model based on a social network, which was integrated with an anecdotal information exchange process. The contributions were to model the households’ evaluation, which changes with social influence, and analyze the impact of such dynamics on the adoption of residential PV. A case study was conducted for villages in Beijing. Different scenarios about policies have been considered concerning both the economic benefits and the information diffusion on social network. The results show that: (1) Providing insurance against the damage of PV to adopters for free can improve the adoption rate from 24% up to 62% (full insurance), and the new adopter acquisition cost is only 36% of that of providing additional subsidy; (2) The enhancement of communications (e.g. Bulletin Board System (BBS) and Social Networking Services (SNS)) creates an obstacle to the residential PV adoption when the majority of households have insufficient knowledge about the PV system; and (3) Information campaigns and information screening are both effective and necessary in mitigating the negative effect from the enhancement of communications at the initial stage of the residential PV market. 

  • 200.
    Wang, Ge
    et al.
    China Univ Petr, Acad Chinese Energy Strategy, Beijing, Peoples R China..
    Zhang, Qi
    China Univ Petr, Acad Chinese Energy Strategy, Beijing, Peoples R China..
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Yan
    China Univ Petr, Acad Chinese Energy Strategy, Beijing, Peoples R China..
    Chen, Siyuan
    China Univ Petr, Acad Chinese Energy Strategy, Beijing, Peoples R China..
    The impact of social network on the adoption of real-time electricity pricing mechanism2017Ingår i: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON APPLIED ENERGY / [ed] Yan, J Wu, J Li, H, ELSEVIER SCIENCE BV , 2017, s. 3154-3159Konferensbidrag (Refereegranskat)
    Abstract [en]

    The option menu of electricity tariffs is a compromise way for introducing real-time pricing (RTP) to consumers while remain the alternative fixed pricing (FP). Since it is difficult for a consumer to evaluate RTP and FP two tariffs because of the information asymmetry, and the acquaintances' opinions may play an important role when making a choice. This study aims to evaluate the impact of the social network on the diffusion of real-time electricity price using evolutionary game theoretical analysis. Consumers with heterogeneities in demand response capability and relationships in the social network are considered in an electricity market RTP and FP simultaneously. The consumers who adopt RTP can response to the varying price by shifting their electricity consumption to minimize their expenditures and inversely influence the price. As a case study, hundreds of scenarios of different initial conditions including social networks structures and update rules were analyzed and inter-compared using the developed model. The results show that: (i) the higher degree of the consumers social network, the slower the diffusion of RTP; (ii) increasing the proportion of consumers with high demand response capability can promote the adoption of RTP, implying the worth of promoting the utilization of smart home technology; (iii) a small exogenous probability (e.g. 1%) of the tariff choice mutation can accelerate the diffusion of RTP, indicating that the advertisement of RTP can be useful.

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