mdh.sePublications
Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 192) Show all publications
Li, H., Song, J., Sun, Q., Wallin, F. & Zhang, Q. (2019). A dynamic price model based on levelized cost for district heating. Energy, Ecology and Environment, 4(1), 15-25
Open this publication in new window or tab >>A dynamic price model based on levelized cost for district heating
Show others...
2019 (English)In: Energy, Ecology and Environment, ISSN 2363-7692, Vol. 4, no 1, p. 15-25Article in journal (Refereed) Published
Abstract [en]

District Heating (DH) is facing a tough competition in the market. In order to improve its competence, an effective way is to reform price models for DH. This work proposed a new dynamic price model based on the levelized cost of heat (LCOH) and the predicted hourly heat demand. A DH system in Sweden was used as a case study. Three methods were adopted to allocate the fuel cost to the variable costs of heat production, including (1) in proportion to the amount of heat and electricity generation; (2) in proportion to the exergy of generated heat and electricity; and (3) deducting the market price of electricity from the total cost. Results indicated that the LCOH-based pricie model can clearly reflect the production cost of heat. Through the comparison with other market-implemented price models, it was found that even though the market-implemented price models can, to certain extent, reflect the variations in heat demand, they cannot reflect the changes in production cost when different methods of heat production are involved. In addition, price model reforming can lead to a significant change in the expense of consumers and consequently, affect the selection of heating solution.

Place, publisher, year, edition, pages
Joint Center on Global Change and Earth System Science of the University of Maryland and Beijing Normal University, 2019
Keywords
District heating, Dynamic heat price, Heat demand, Levelized cost of heat, Price model
National Category
Energy Engineering Energy Systems
Identifiers
urn:nbn:se:mdh:diva-42917 (URN)10.1007/s40974-019-00109-6 (DOI)2-s2.0-85062437670 (Scopus ID)
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-08-13Bibliographically approved
Nian, V., Jindal, G. & Li, H. (2019). A feasibility study on integrating large-scale battery energy storage systems with combined cycle power generation – Setting the bottom line. Energy, 185, 396-408
Open this publication in new window or tab >>A feasibility study on integrating large-scale battery energy storage systems with combined cycle power generation – Setting the bottom line
2019 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 185, p. 396-408Article in journal (Refereed) Published
Abstract [en]

Strong attention has been given to the costs and benefits of integrating battery energy storage systems (BESS) with intermittent renewable energy systems. What's neglected is the feasibility of integrating BESS into the existing fossil-dominated power generation system to achieve economic and environmental objectives. In response, a life cycle cost-benefit analysis method is introduced in this study taking into consideration three types of battery technologies, namely, vanadium redox flow battery, zinc bromine flow battery, and lithium-iron-phosphate battery. The objective is to evaluate the life cycle carbon emissions and cost of electricity production by combined cycle power generation with grid-connected BESS. Findings from the Singapore case study suggest a potential 3–5% reduction in the life cycle carbon emission factors which could translate to a cumulative carbon emission reduction of 9–16 million tonnes from 2018 to 2030 from electricity generation. Grid-connected BESS could reduce the levelized cost of electricity by 4–7%. A synergistic planning of CCGT and BESS could theoretically reduce the system level power generation capacity by 26% albeit a potential increase in the overall capital cost at the current cost of batteries. The projected battery cost reduction is critical in improving the feasibility of large-scale deployment. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Cost benefit analysis, Energy storage system, Life cycle analysis, Lithium ion battery, Vanadium redox flow battery, Zinc bromine flow battery
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:mdh:diva-44932 (URN)10.1016/j.energy.2019.07.028 (DOI)000484869400033 ()2-s2.0-85068930332 (Scopus ID)
Available from: 2019-08-01 Created: 2019-08-01 Last updated: 2019-09-26Bibliographically approved
Lu, H., Yu, X., Li, H., Schwede, S. & Tu, S.-T. -. (2019). Accurately measurement and efficiently recovery of ionic liquid in energy utilization of microalgae. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 1337-1341). Elsevier Ltd, 158
Open this publication in new window or tab >>Accurately measurement and efficiently recovery of ionic liquid in energy utilization of microalgae
Show others...
2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 1337-1341Conference paper, Published paper (Refereed)
Abstract [en]

Chlorella vulgais, a kind of micro-alagae, is an attracting feedstock for bioenergy production, such as biodiesel and biogas. But its tough cell wall structure is the main obstacle to efficiently extracting lipids and other biomass. Ionic liquid (IL) can be used to hydrolyze its cell-wall. However, due to its high cost and toxicity, it is important to recover IL as much as possible. Therefore, a method that can accurately measure the content of ILs, is urgently needed. In this work, two common methods that are used to measure the content of ILs: equimolar titration method and ultraviolet absorbance spectra were compared. The results show that equimolar titration method is not available for trace quantity analysis of ionic liquids as the endpoint of titration is hard to be identified at low IL content (<10 mg/L); while UV absorbance spectra method can be used at low IL contents, whereas, it may result in big deviations. To further improve the accuracy of UV absorbance spectra method, concentrating the sample could be a potential solution.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Chlorella, Industrial ionic liquid, Lipids extraction, Biomass, Energy utilization, Lipids, Titration, Bioenergy productions, Cell wall structure, Cell walls, Micro-algae, Quantity analysis, Ultraviolet absorbance, UV absorbance spectra, Ionic liquids
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-43193 (URN)10.1016/j.egypro.2019.01.328 (DOI)000471031701108 ()2-s2.0-85063873518 (Scopus ID)
Conference
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-07-11Bibliographically approved
Xi, X., Li, H., Wallin, F., Avelin, A., Yang, X. & Yu, Z. (2019). Air pollution related externality of district heating - A case study of Changping, Beijing. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China (pp. 4323-4330). Elsevier Ltd
Open this publication in new window or tab >>Air pollution related externality of district heating - A case study of Changping, Beijing
Show others...
2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, p. 4323-4330Conference paper, Published paper (Refereed)
Abstract [en]

Air pollution, caused by the use of fossil fuel, has been an environmental plague in China. It has a strong negative impact on human health. Since the costs of damage to health are not born by the pollution producers, these costs translate to social externality. Policies have an important role in optimizing resource allocation, such as penalizing the pollutant producers and incentivizing clean energy development. Among others, replacing coal with natural gas for heating represents an important example of air quality improvement measures. This paper presents a study that evaluates the health impacts from air pollution and the external cost of the "Coal-To-Gas" policy in district heating using Changping District (Beijing, China) as an example. Four scenarios were considered based on the historical and standard PM2.5 concentration. Results show that PM2.5 is responsible for causing an increase of 40% premature deaths in 2015 and that the monetary value of damage to health is higher than 1.2 billion CNY. In 2016 and 2017, the reported air quality was better than that in 2015. As a result, 13.3% and 26% premature deaths caused by air pollution were avoided in 2016 and 2017 compared to 2015 respectively. If the PM2.5 concentration level were to be reduced to national standard, the number of premature deaths attributed to PM2.5 could further decrease to 47.7% compared to 2015. Overall, the Coal-To-Gas policy in district heating reduces 0.017%~0.45% of premature death caused by air pollution each year. Air pollution reduction policies, which are expected to improve air quality together in the future, and the specific policy of Coal-To-Gas in district heating, could make great contribution to reducing the premature death caused by environmental problem and need more attention from the government and the public.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Coal-To-Gas, District heating, Externality, Health effect, PM2.5
National Category
Medical Engineering
Identifiers
urn:nbn:se:mdh:diva-43140 (URN)10.1016/j.egypro.2019.01.789 (DOI)000471031704105 ()2-s2.0-85063905381 (Scopus ID)
Conference
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Available from: 2019-04-18 Created: 2019-04-18 Last updated: 2019-07-11Bibliographically approved
Lin, H., Fu, K., Wang, Y., Sun, Q., Li, H., Hu, Y., . . . Wennersten, R. (2019). Characteristics of electric vehicle charging demand at multiple types of location - Application of an agent-based trip chain model. Energy, 188, Article ID 116122.
Open this publication in new window or tab >>Characteristics of electric vehicle charging demand at multiple types of location - Application of an agent-based trip chain model
Show others...
2019 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 188, article id 116122Article in journal (Refereed) Published
Abstract [en]

This paper developed an agent-based trip chain model (ABTCM) to study the distribution of electric vehicles (EVs) charging demand and its dynamic characteristics, including flexibility and uncertainty, at different types of location. Key parameters affecting charging demand include charging strategies, i.e. uncontrolled charging (UC) and off-peak charging (OPC), and EV supply equipment, including three levels of charging equipment. The results indicate that the distributions of charging demand are similar as the travel patterns, featured by traffic flow at each location. A discrete peak effect was found in revealing the relation between traffic flow and charging demand, and it results in the smallest equivalent daily charging demand and peak load at public locations. EV charging and vehicle-to-grid (V2G) flexibility were examined by instantaneous adjustable power and accumulative adjustable amount of electricity. The EVs at home locations have the largest charging and V2G flexibility under the UC strategy, except for a period of regular working time. The V2G flexibility at work and public locations is generally larger than charging flexibility. Due to the fast charging application, the uncertainties of charging demand at public locations are the highest in all locations. In addition, the OPC strategy mitigates the uncertainty of charging demand. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Agent-based trip chain model, Charging flexibility, Electric vehicle, Fast charging, Vehicle to grid
National Category
Transport Systems and Logistics Vehicle Engineering
Identifiers
urn:nbn:se:mdh:diva-45314 (URN)10.1016/j.energy.2019.116122 (DOI)2-s2.0-85072302928 (Scopus ID)
Available from: 2019-09-26 Created: 2019-09-26 Last updated: 2019-09-27Bibliographically approved
Du, Y., Wang, C., Li, H., Song, J. & Li, B. (2019). Clustering heat users based on consumption data. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 3196-3201). Elsevier Ltd, 158
Open this publication in new window or tab >>Clustering heat users based on consumption data
Show others...
2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 3196-3201Conference paper, Published paper (Refereed)
Abstract [en]

In today's district heating (DH) energy market, it is common to use user functional categories in price models to determine the heat price. However, users in the same category do not necessarily have the same energy consumption patterns, which potentially leads to unfair prices and many other practical issues. Taking into account heat usage characteristics, this work proposes two data-driven methods to cluster DH users to identify similar usage patterns, using practical energy consumption data. Efforts are focused on extracting representative features of users from their daily usage profiles and duration curves, respectively. Employing clustering based on these features, the resulting typical usage patterns and user category distributions are discussed. Our results can serve as potential inputs for future energy price models, demand-side management, and load reshaping strategies.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Consumption profile, District heating, Duration curve, User clustering, Electric utilities, Data-driven methods, Energy markets, Future energies, Practical energies, Practical issues, Energy utilization
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-43194 (URN)10.1016/j.egypro.2019.01.1010 (DOI)000471031703087 ()2-s2.0-85063916560 (Scopus ID)
Conference
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-08-13Bibliographically approved
Liu, S., Wu, S., Hu, Y. & Li, H. (2019). Comparative analysis of air and CO2 as working fluids for compressed and liquefied gas energy storage technologies. Energy Conversion and Management, feb, 608-620
Open this publication in new window or tab >>Comparative analysis of air and CO2 as working fluids for compressed and liquefied gas energy storage technologies
2019 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. feb, p. 608-620Article in journal (Refereed) Published
Abstract [en]

With the large-scale use of intermittent renewable energy worldwide, such as wind energy and solar energy, energy storage systems are urgently needed and have been rapidly developed. Technologies of compressed gas energy storage (CGES) and liquefied gas energy storage (LGES) are playing an important role, and air has been commonly used as working fluid. CO2 is another potential working fluid and attracting more and more attention due to the rise of CO2 capture and utilization. However, it is still unclear which is the better working fluid. This paper comparatively analyzed the performance of CGES and LGES systems using air and CO2 as working fluids. Both diabatic and adiabatic CGES are considered. Simulation results show that except diabatic CGES systems, using CO2 could achieve a similar or even higher round-trip efficiency than using air. In addition, the use of CO2 instead of air as a working fluid has additional advantages, such as a lower storage temperature can be achieved at the same storage pressure for the adiabatic CGES system; and a higher condensing temperature can be achieved at the same condensing pressure for the LGES system, which can benefit the system design and operation.

National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41805 (URN)10.1016/j.enconman.2018.12.031 (DOI)000458221800048 ()2-s2.0-85059173064 (Scopus ID)
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2019-02-28Bibliographically approved
Song, C., Liu, Q., Deng, S., Li, H. & Kitamura, Y. (2019). Cryogenic-based CO2 capture technologies: State-of-the-art developments and current challenges. Renewable & sustainable energy reviews, 101, 265-278
Open this publication in new window or tab >>Cryogenic-based CO2 capture technologies: State-of-the-art developments and current challenges
Show others...
2019 (English)In: Renewable & sustainable energy reviews, ISSN 1364-0321, E-ISSN 1879-0690, Vol. 101, p. 265-278Article in journal (Refereed) Published
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. 

National Category
Energy Systems
Identifiers
urn:nbn:se:mdh:diva-41504 (URN)10.1016/j.rser.2018.11.018 (DOI)000454429100019 ()2-s2.0-85057097526 (Scopus ID)
Available from: 2018-12-06 Created: 2018-12-06 Last updated: 2019-01-10Bibliographically approved
Li, Y., Jin, Y., Borrion, A. & Li, H. (2019). Current status of food waste generation and management in China. Bioresource Technology, 273, 654-665
Open this publication in new window or tab >>Current status of food waste generation and management in China
2019 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 273, p. 654-665Article in journal (Refereed) Published
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-41789 (URN)10.1016/j.biortech.2018.10.083 (DOI)000453742100079 ()30446254 (PubMedID)2-s2.0-85056380462 (Scopus ID)
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2019-06-18Bibliographically approved
Tang, Y., Zhang, Q., Li, H., Li, Y. & Liu, B. (2019). Economic analysis on repurposed EV batteries in a distributed PV system under sharing business models. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 4304-4310). Elsevier Ltd, 158
Open this publication in new window or tab >>Economic analysis on repurposed EV batteries in a distributed PV system under sharing business models
Show others...
2019 (English)In: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, p. 4304-4310Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
Elsevier Ltd, 2019
Keywords
Non-cooperative game, Retired EV batteries, Sharing business models, Economic analysis, Electric batteries, Game theory, Photovoltaic cells, Business modeling, Business models, Distributed energies, Economic viability, EV battery, Feed-in tariff, Noncooperative game, PV generation, Battery storage
National Category
Energy Engineering
Identifiers
urn:nbn:se:mdh:diva-43189 (URN)10.1016/j.egypro.2019.01.793 (DOI)000471031704102 ()2-s2.0-85063872354 (Scopus ID)
Conference
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Available from: 2019-04-25 Created: 2019-04-25 Last updated: 2019-07-11Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6279-4446

Search in DiVA

Show all publications