Energy utilization

Thermodynamic Analysis of Solid Oxide Fuel Cell Based Combined Cooling, Heating, and Power System Integrated with Solar-Assisted Electrolytic Cell

  • GAO Yuefen ,
  • YAO Wenqi ,
  • WANG Jiangjiang ,
  • CUI Zhiheng
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  • Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology, North China Electric Power University, Baoding 071003, China

Online published: 2023-11-28

Supported by

This research has been supported by the National Natural Science Foundation of China (Grant No. 51876064 and 52090064) and the Bureau of Shihezi Science & Technology (Grant No. 2021ZD02).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Abstract

Syngas fuel such as hydrogen and carbon monoxide generated by solar energy is a promising method to use solar energy and overcome its fluctuation effectively. This study proposes a combined cooling, heating, and power system using the reversible solid oxide fuel cell assisted by solar energy to produce solar fuel and then supply energy products for users during the period without solar radiation. The system runs a solar-assisted solid oxide electrolysis cell mode and a solid oxide fuel cell mode. The thermodynamic models are constructed, and the energetic and exergetic performances are analyzed. Under the design work conditions, the SOEC mode’s overall system energy and exergy efficiencies are 19.0% and 20.5%, respectively. The electrical, energy and exergy efficiencies in the SOFC mode are 51.4%, 71.3%, and 45.2%, respectively. The solid oxide fuel cell accounts for 60.0% of total exergy destruction, caused by the electrochemical reactions' thermodynamic irreversibilities. The increase of operating temperature of solid oxide fuel cell from 800℃ to 1050℃ rises the exergy and energy efficiencies by 11.3% and 12.3%, respectively. Its pressure from 0.2 to 0.7 MPa improves electrical efficiency by 13.8% while decreasing energy and exergy efficiencies by 5.2% and 6.0%, respectively.

Cite this article

GAO Yuefen , YAO Wenqi , WANG Jiangjiang , CUI Zhiheng . Thermodynamic Analysis of Solid Oxide Fuel Cell Based Combined Cooling, Heating, and Power System Integrated with Solar-Assisted Electrolytic Cell[J]. Journal of Thermal Science, 2023 , 32(1) : 93 -108 . DOI: 10.1007/s11630-022-1680-z

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