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  • 1.
    Bartusch, Cajsa
    et al.
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Larsson, Mikael
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Wallin, Fredrik
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Wester, Lars
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Potential of hourly settlements in the residential sector of the Swedish electricity market: Estimations of risk reduction and economic result2010In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 7, no 3, p. 224-240Article in journal (Refereed)
    Abstract [en]

    Increased demand response is essential in order to boost the effectiveness of the Swedish power market. The all-embracing installation of automatic meter reading systems enables power suppliers to introduce hourly settlements in the residential sector. The aim of the study has been to assess the impact of electricity retailers’ physical and financial risk in customer segments with different heating systems as well as to estimate the potential of the electricity contract ”Fixed price with the right to return” in terms of economic consequences and risk management. The results show that households whose main heating system consists of a geothermal heat pump constitute the largest physical price and volume risk of suppliers. The gain of introducing hourly settlements in the residential electricity market has furthermore proven to be manifold from both an economic and risk reducing point of view.

  • 2.
    Campana, Pietro Elia
    et al.
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Olsson, A.
    KTH Royal Institute of Technology, Stockholm.
    Li, Hailong
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Yan, Jinyue
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    An economic analysis of photovoltaic water pumping irrigation systems2016In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 13, no 8, p. 831-839Article in journal (Refereed)
    Abstract [en]

    ABSTRACT: Irrigation using the photovoltaic water pumping (PVWP) systems represents a sustainable and attractive solution, which can combat Chinese grassland desertification and promote a sustainable development of the agricultural sector. This paper investigates the economics of PVWP systems taking into consideration the effects of the key components on the initial capital cost (ICC), life cycle cost (LCC), and revenues. Sensitivity analyses are conducted regarding the crop yield and price, cost of photovoltaic modules, and system components included in the ICC. Results show that the cost of the PVWP system is the most sensitive parameter affecting the ICC under the assumptions made, especially the cost of the PV modules; whereas, the crop production and price affect the net present value (NPV) and payback period (PBP) clearly. The PVWP has surplus power output when the crop water demand is low or it is non-irrigation season. The potential benefit from selling the surplus electricity is also discussed. In addition, the indirect benefits of carbon sequestration and CO2 emission reduction by applying PVWP systems are addressed in this paper.

  • 3.
    Dahlquist, Erik
    et al.
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Vassileva, Iana
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Wallin, Fredrik
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Thorin, Eva
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    OPTIMIZATION OF THE ENERGY SYSTEM TO ACHIEVE A NATIONAL BALANCE WITHOUT FOSSIL FUELS2011In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 8, no 6, p. 684-704Article in journal (Refereed)
    Abstract [en]

    In this article, the overall energy balance for Sweden and to some extent EU27 is discussed. It deals with the reduction of the total consumption in industrial, transport, and domestic sectors through more efficient vehicles, industrial processes, and buildings and individual behavior. The conclusion is that it should be relatively easy for Sweden to reach a sustainable society if the political will, in the form of policies and incentives, is present. It would also be possible for the EU27 to reach a sustainable society, although it would be more demanding (challenging?).

  • 4.
    Fiedler, Frank
    et al.
    Mälardalen University, Department of Public Technology. Dalarna University College, Sweden.
    Bales, C
    Dalarna University College, Sweden.
    Persson, T
    Dalarna University College, Sweden.
    Optimisation method for solar heating systems in combination with pellet boilers/stove2007In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 4, no 3, p. 325-337Article in journal (Refereed)
    Abstract [en]

    n this study, an optimisation method for the design of combined solar and pellet heating systems is presented and evaluated. The paper describes the steps of the method by applying it to an example system. The objective of the optimisation was to find the design parameters that give the lowest auxiliary energy (pellet fuel + auxiliary electricity) and carbon monoxide (CO) emissions for a system with a typical load: a single family house in Sweden. Weighting factors have been used for the auxiliary energy use and CO emissions to give a combined objective function. Different weighting factors were tested. The results show that extreme weighting factors lead to their own minima. However, it was possible to find factors that ensure low values for both auxiliary energy and CO emissions, and suitable weighting factors are suggested.

  • 5.
    Hu, Y.
    et al.
    KTH.
    Li, Hailong
    KTH.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Integration of Evaporative Gas Turbine with Oxy-Fuel Combustion for Carbon Dioxide Capture2010In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 7, no 6, p. 615-631Article in journal (Refereed)
    Abstract [en]

    This paper studied the integration of Evaporative Gas Turbine (EvGT) cycle with oxy-fuel combustion for CO2 capture. The impact of key parameters on system electrical efficiency, such as the oxygen purity, Water/Gas ratio (W/G) has been investigated concerning thermal efficiency. The performance of dry recycle and wet recycle also has be analyzed and compared. Simulation results shows that: (1) 97% can be considered as the optimum oxygen purity taking into account the trade-off between the air separation unit (ASU) consumption penalty of producing higher-purity oxygen and electrical efficiency; (2) there exists an optimum point of W/G for both EvGT and EvGT combined with oxy-fuel combustion CO2 capture technology; (3) dry recycle has a considerably higher electrical efficiency comparing with wet recycle, but more cooled water can be saved in the wet recycle. The performance of EvGT cycle was also compared to the combined cycle (CC) when CO2 capture was considered. The comparison shows that CC has a higher net power output and electrical efficiency than the EvGT cycle no matter if combined with oxy-fuel combustion CO2 capture technology or not.

  • 6.
    Li, Hailong
    et al.
    Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology.
    Flores, S.
    Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology, Stockholm.
    Hu, Y.
    Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology, Stockholm.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Simulation and Optimization of Evaporative Gas Turbine with Chemical Absorption for Carbon Dioxide Capture2009In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 6, no 5, p. 527-539Article in journal (Refereed)
    Abstract [en]

    This article studied the integration of an evaporative gas turbine (EvGT) cycle with chemical absorption for CO2 capture. Two systems of EvGT cycle without CO2 capture and EvGT cycle with CO2 capture were simulated and optimized. The impacts of key parameters such as the water/air ratio (W/A), the stripper pressure, and the flue-gas condensing temperature were studied regarding the electrical efficiency and CO2 reduction. Simulation results show that (1) there always exists an optimum point of W/A for both EvGT and EvGT combined with CCS; (2) although lowering the stripper pressure would lower the heat quality requirement of reboiler, it increases the quantity more obviously. Therefore increasing the operating pressure of stripper would help to increase the total electrical efficiency; but the efficiency improvement becomes smaller if stripper pressure is high; (3) adding a flue-gas condenser to condense out the excessive water is another method to increase the total electrical efficiency. There is also an optimum point of condensing temperature considering the concentration of mono ethanol amine (MEA) and inlet temperature of stripper; and (4) comparatively the combined cycle has a higher gross electricity generation and electrical efficiency than the EvGT cycle no matter if combined with CO2 capture or not.

  • 7.
    Li, Hailong
    et al.
    KTH.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Performance Comparison on the Evaporative Gas Turbine Cycles Combined with Different CO2-Capture Options2009In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 6, no 5, p. 512-526Article in journal (Refereed)
    Abstract [en]

    This article studied the integration of CO2 capture with evaporative gas turbine (EvGT) cycles. Two CO2 capture technologies are involved: MEA-based (monoethanolamine-based) chemical-absorption capture and O2/CO2 recycle combustion capture. Based on them, three system configurations were analyzed: (1) EvGT cycle without CO2 capture, (2) EvGT cycle with chemical-absorption capture, and (3) EvGT cycle with O2/CO2 recycle combustion capture. Simulation results show that the EvGT cycle with chemical-absorption capture has a higher electrical efficiency (39.73%) than the EvGT cycle with O2/CO2 recycle combustion capture (37.45%). Compared with the EvGT cycle without CO2 capture, the penalty on electrical efficiency caused by CO2 capture is 11.91% if EvGT is combined with chemical-absorption capture, and 14.19% if EvGT is combined with O2/CO2 recycle combustion capture. Moreover compared with combined cycles, EvGT cycles have a smaller gross electricity generation and a lower electrical efficiency no matter if they are combined with CO2 capture or not. Based on the analysis results of this article, several suggestions are also proposed to improve the net electrical efficiency of EvGT cycles with CO2 capture.

  • 8.
    Mahmoudi, Jafar
    Mälardalen University.
    Modeling of flow field and heat transfer in a copper-base automotive radiator application2006In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 3, no 1, p. 25-41Article in journal (Refereed)
    Abstract [en]

    This paper describes a methodology used for designing louvered fins. Louvered fins are commonly used in many compact heat exchangers to increase the surface area and initiate new boundary layer growth. Detailed measurements can be accomplished with computational models of these louvered fins to gain a better understanding of the flow field and heat distribution. The particular louver geometry studies for this work have a louver angle of 23° and fin count of 17 fpi. The flow and he at transfer characteristics for three-dimensional mixed convection flows in a radiator flat tube with louvered fins are analyzed numerically. A three-dimensional model is developed to investigate flow and conjugate heat transfer in the copper-based car radiator. The model was produced with the commercial program FLUENT. The theoretical model has been developed and validated by comparing the predictions of the model with available experimental data. The thermal performance and temperature distribution for the louvered fins were analyzed and a procedure for optimizing the geometrical design parameter is presented. One fin specification among the various flat tube exchangers is recommended by first considering the heat transfer and pressure drop. The effects of variation of coolant flow conditions and external air conditions on the flow and the thermal characteristics for the selected radiator are investigated also. The results will be used as fundamental data for tube design by suggesting specifications for car radiator tubes.

  • 9.
    Mahmoudi, Jafar
    Mälardalen University. Outokumpu Copper, RandD Division, Västeras, Sweden.
    Modeling of fluid flow and heat transfer in a copper based heat sink application2006In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 3, no 3, p. 219-237Article in journal (Refereed)
    Abstract [en]

    With the trend towards increasing the speed of processors in smaller sized of computers, there has been considerable interest in heat sink technologies with higher levels of performance and further miniaturization. This work addresses the fundamental heat transfer augmentation question of how to design a copper-based heat sink, when the overall dimensions of the bottom plate or fan are specified. A three-dimensional finite-volume model has been developed and applied to investigate flow and conjugate heat transfer in the copper-based heat sink. The model was produced with the commercial program FLUENT, which allows this nonlinear, highly turbulent problem to be simulated using the k-ε turbulence model. The theoretical model developed is validated by comparing the model predictions with available experimental data. The thermal performance and temperature distribution for the heat sink were analyzed and a procedure for optimizing the geometrical design parameters based on less space occupation and more efficient heat transfer coefficient is presented. Several design examples with different types of cooling methods and manufacturing processes have been analyzed. The reliability and effectiveness in heat spreading of those has been compared. It has been shown that the copper-based heat sink with louvered fins (case No.3) has an optimum design configuration.

  • 10.
    Mahmoudi, Jafar
    et al.
    Mälardalen University, School of Sustainable Development of Society and Technology. Outokumpu Copper, Sweden.
    Nabati, Hamid
    Mälardalen University, School of Sustainable Development of Society and Technology.
    An Experimental Study on Productivity and Quality Improvement of Horizontal Continuous Casting Process2006In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 3, no 2, p. 185-199Article in journal (Refereed)
    Abstract [en]

    The aim of the current work is to provide information on how to improve the productivity and quality in the Horizontal Continuous Casting process (HCC). After a first numerical 2D/3D survey about the solidification in the HCC, an experimental investigation has been carried out to validate numerical results. Some casting parameters have been measured and collected: inlet and outlet temperatures, flow rate, heat flux and casting temperature. The study results lead to a correlation between these casting parameters and the casting quality. To obtain the best quality for each alloy, a set of operating parameters has been proposed. There is a very good agreement between the current results and earlier numerical results. Also based on the results, one can gain an insight on the productions of each casting machine and the grades of its quality.

  • 11.
    Sandberg, Jan
    et al.
    Mälardalen University, Department of Public Technology.
    Sand, Ulf
    Bel Fdhila, Rebei
    Measurements, theories and simulations of particle deposits on super-heater tubes in a CFB biomass boiler2006In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 3, no 1, p. 43-61Article in journal (Refereed)
    Abstract [en]

    The present investigation involves theories, simulations and experiments on deposit layers on super-heater tubes in a circulating fluidised bed in Vdsteras in Sweden. Simulation of particle trajectories in the vicinity of two super-heater tubes is conducted in a Eulerian-Lagrangian mode for the flue gas and the ash particles from the combustion process. Particle impingements on the tubes are investigated for different particle sizes. Measurements of the buildup of deposit layers in the super-heater environment are conducted using a deposit probe. Deposit layer growth and growth rate is analysed for different probe temperatures, as well as the aspect of sintering on the probe ring surface. Analysis of the probe deposit material and deposits from the super-heaters and from textile filters are chemically analysed. The temperature dependence of the deposit materials viscosity is predicted from the chemical analysis of the samples. A model is included to simulate the effect of the deposit layer thickness on the tube heat exchange. The results from the particle trajectory simulations show that particle larger than 10 mu m will mainly impinge on the front of the first tube and that smaller particles are more dispersed due to turbulence and thermophorectic forces, enabling a more even impingement on the whole surface of the tubes. The probe deposit layer growth measurements show significant temperature dependence. The deposit material sintering and distribution is proven to be dependent on; temperature, particle size and exposure time. The stickiness of the deposit material is shown to be dependent on the SiO2 and alkali relation in the samples, estimated through a viscosity model.

  • 12.
    Stigson, Peter
    et al.
    Mälardalen University, School of Business, Society and Engineering.
    Dotzauer, Erik
    KTH Royal Institute of Technology.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Climate and Energy Policy Evaluation in Terms of Relative Industrial Performance and Competitiveness2009In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 6, no 5, p. 450-465Article in journal (Refereed)
    Abstract [en]

    Due to differences in greenhouse-gas abatement costs within the industrial sectors, there is an ongoing discussion on potential negative competitive effects of climate and energy policies. This article argues that policymakers must acknowledge the relative performance of industrial operations parallel to the competitors, the compulsoriness of policies, and the harmonization of policies accordingly. To this end, the authors suggest a tool aimed for robust participatory policy evaluations at decision-maker levels. The tool promotes policy learning, transparency, and consensus building, hence contributing to more effective and efficient policy design and management process. The tool is exemplified in a Swedish context.

  • 13.
    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 metabolism2016In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 13, no 8, p. 793-802Article in journal (Refereed)
    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.

  • 14.
    Tao, Jun
    et al.
    North China Electric Power University ,China.
    Dong, Changqing
    North China Electric Power University, China.
    Lu, Qiang
    North China Electric Power University, China.
    Liao, Xiaolang
    North China Electric Power University, China.
    Yang, Yongping
    North China Electric Power University, China.
    Du, Xiaoze
    North China Electric Power University, China.
    Dahlquist, Erik
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Catalytic cracking of biomass high-temperature pyrolysis tar using NiO/AC catalysts2015In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 12, no 8, p. 773-779Article in journal (Refereed)
    Abstract [en]

    Nickel oxide supported on activated carbon (NiO/AC) catalysts were prepared and used for catalytic cracking of tars from inert high-temperature pyrolysis of biomass. Rice husk was selected as the feedstock, and pyrolyzed at 800 °C using a lab-scale pyrolysis set. The pyrolysis vapors were subjected to either thermal cracking or catalytic cracking under 500-700 °C. The results indicated the thermal cracking was not very efficient to convert the tars, while the catalytic cracking reduced both the light and heavy tars significantly. The yield of the light and heavy tars were decreased from 4.4 wt% and 1.9 wt% in the non-catalytic process to 0.2 wt% and 0.1 wt% in the catalytic process by the NiO/AC (4.3 wt%) at 700 °C. The catalytic cracking also increased the gas product remarkably, mainly the H2 and CO2. The catalytic performance of the NiO/AC catalyst could enhance at elevated catalytic temperatures and increased NiO content of the catalyst.

  • 15.
    Wang, C.
    et al.
    Luleå University of Technology, Luleå, Sweden.
    Larsson, M.
    MEFOS - Metallurgical Research Institute AB, Luleå, Sweden.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Dahl, J.
    Luleå University of Technology, Luleå, Sweden.
    CO2 emission reduction in the steel industry by using emission trading programs2007In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 4, no 5, p. 505-518Article in journal (Refereed)
    Abstract [en]

    The implementation of the EU Emission Trading Scheme ( ETS) started on January 1(st) 2005 according to national plans for allocating emissions rights. The steel industry is one of the industrial sectors included in this scheme. The objective of this paper is to investigate and evaluate the optimum solution( s) for European steel plants to meet their emission allowance with low reduction cost. An optimization model based on a Swedish steel plant is developed and used. Three scenarios were created in the model, i. e., internal changes within the steel plant, EU ETS, and the Kyoto Protocol's clean development mechanism ( CDM). For the last scenario, China was selected as a country of the non- Annex I Party for the emission trading by CDM. The modeling results show that the studied plant will face an emission gap between allowed and calculated emissions in the near future. Compared to EU ETS, the implementation of CDM projects will make the plant reduce CO2 emissions at a lower cost. The internal changes within the plant will also play an important role for the solution of low abatement cost. The model developed could serve as a benchmark for the future emission trading simulation's purpose within the European steel industry.

  • 16.
    Yan, Jinyue
    et al.
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Chou, S. K.
    National University of Singapore, Singapore.
    Dahlquist, Erik
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Li, Hailong
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Innovative research for sustainable energy systems2015In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 12, no 3, p. 191-191Article in journal (Other academic)
  • 17.
    Yan, Jinyue
    et al.
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Royal Institute of Technology, Stockholm, Sweden.
    Desideri, U.
    Universita’ di Perugia, Università degli Studi di Pisa, Pisa, Italy.
    Chou, S. K.
    National University of Singapore, Singapore.
    Li, Hailong
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center.
    Energy solutions for a sustainable world2016In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 13, no 8, p. 757-758Article in journal (Refereed)
  • 18.
    Yang, Hongxing
    et al.
    Hong Kong Polytech Univ, Hong Kong, Hong Kong, Peoples R China..
    Leung, Dennis Y. C.
    Univ Hong Kong, Hong Kong, Hong Kong, Peoples R China..
    Yan, Jinyue
    Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Royal Inst Technol, Stockholm, Sweden..
    First International Congress on Applied Energy, Hong Kong, January 5-7, 20092010In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 7, no 3, p. 223-223, article id PII 922586049Article in journal (Other academic)
  • 19.
    Zeng, Lei
    et al.
    Luleå University of Technology , Luleå, Sweden.
    Yan, Jinyue
    Luleå University of Technology , Luleå, Sweden.
    Policy, Institutional and Market Barriers to the Implementation of Clean Development Mechanisms (CDM) in China2005In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, no 2, p. 259-271Article in journal (Refereed)
    Abstract [en]

    China is the second largest emitter of greenhouse gases (GHG) in the world, with potentially about two thirds of total Certified Emission Reductions (CERs) for Asia on the world carbon market (Gruetter, 2002). Since 68% of its primary energy is from coal, China’s average energy intensity is 7.5 times higher than the EU and 4.3 times higher than the US (EU, 2003). Therefore, introducing advanced clean technologies and management to China represents opportunities for Annex I countries to obtain low-cost CERs through CDM projects, and access to one of the largest potential energy conservation markets in the world. CDM can provide a win-win solution for both China and Annex I countries, and the Chinese government considers that the introduction of CDM projects can bring advanced energy technologies and foreign investment to China, thereby helping China’s sustainable economy and generating CERs. As energy efficiency is generally low and carbon intensity is high in both China’s energy supply and demand sectors, numerous options exist for costeffective energy conservation and GHG mitigation with CDM. This paper reviews current Chinese policies and administrative and institutional settings for CDM cooperation, and discusses existing policy, institutional and other barriers in the energy market by drawing on observations and experience from previous initiatives such as Cleaner Production and energy efficiency. Some options to remove these barriers are addressed. In order to make CDM projects feasible, China’s government needs to promote awareness, streamline administrative

  • 20.
    Zhang, Guoqiang
    et al.
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Yan, Jinyue
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Jin, Hongguang
    Chinese Acad Sci, Inst Engn Thermophys, Beijing.
    Dahlquist, Erik
    Mälardalen University, School of Sustainable Development of Society and Technology.
    Integrated black liquor gasification polygeneration system with CO2 Capture in pulp and paper mills to produce methanol and electricity2011In: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 8, no 2, p. 275-293Article in journal (Refereed)
    Abstract [en]

    Based on KAMa pulp and paper mill, a polygeneration system integrated with a black liquor gasifier is proposed. The effects of CO2 captured by oxygen-fuel combustion and Selexol absorption on the performance of the polygeneration system are studied in terms of both thermodynamic performance and cost assessment. Using the Aspen Plus simulator, the performance of the studied polygeneration systems are analyzed from the perspectives of the first and second laws of thermodynamics. Compared with the reference system, the first law efficiency of the polygeneration system increased from 15.7% to 29.3%, with an investment increment of 17.9%. The investment incremental rates for CO 2 capture by oxyfuel combustion and Selexol absorption are 15.1% and 16.7%, respectively. Energy penalty due to CO2 capture and compression is 0.61 MJ electricity/kg CO2, avoided in the oxygen-fuel method at a cost of $29.6/tonne CO2. However, energy penalty can reach 1.03 MJ product (electricity and methanol) per kg CO2, avoided in the Selexol absorption CO2 capture process at a cost of $46.0/tonne CO2.

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