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Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery
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Hao HU1, Qianxin GUO1, Li YANG2, 3, Xiaobing YU2, 3, Chenxi XUE2, 3, Yonglin LIU2, 3, Yanping XUE4, Qingchuan YANG2, 3, Yuheng GU2, 3
Thermal Power Generation | 2024, 53(7) : 101 - 111
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Thermal Power Generation | 2024, 53(7): 101-111
• Thermal energy science research •
Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery
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Hao HU1, Qianxin GUO1, Li YANG2, 3, Xiaobing YU2, 3, Chenxi XUE2, 3, Yonglin LIU2, 3, Yanping XUE4, Qingchuan YANG2, 3, Yuheng GU2, 3
Affiliations
  • 1.ShenhuaShendong Electric Power Co., Ltd. Technology Research Institute, Xi’an 710076, China
  • 2.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
  • 3.Xi’an TPRI Energy Conservation Technology Co., Ltd., Xi’an 710054, China
  • 4.Dianta Power Plant of Shenhua Shendong Electric Power Co., Ltd., Shenmu 719316, China
Published: 2024-07-25 doi: 10.19666/j.rlfd.202403018
Outline
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Partial heating supercritical carbon dioxide (S-CO2) power cycle system is proven to be one promising option for waste heat recovery. By using LiBr-H2O and NH3-H2O as working fluids, two types of novel combined power systems consisting of a parting pre-heating S-CO2 cycle and different absorption power cycle (APC) systems are proposed. The detailed mathematical models of the proposed parting heating S-CO2/APC systems are built and verified. Based on the results of single- and multi-objective optimization, the performances of the proposed S-CO2/APC system and the standalone S-CO2 system are compared from the perspective of thermodynamics and economics. The single-objective optimization study reveals that the net power output and net efficiency of the S-CO2/LiBr-H2O system and the S-CO2/NH3-H2O system increases by 7.40% and 4.30%, respectively, compared with the standalone S-CO2 system. The multi-objective optimization results show that, the S-CO2/LiBr-H2O system and S-CO2/NH3-H2O system can obtain improvements of 7.94% and 5.13% in net efficiency as well as promotion of 12.35% and 9.02% in the specific investment cost respectively, indicating that the S-CO2/LiBr-H2O system has a greater potential. Exergy loss analysis reveals that the main exergy loss exists in the coolers and the heaters, and the proposed S-CO2/APC systems can significantly reduce the exergy loss in the S-CO2 cooler by about 45%.

partial pre-heating supercritical carbon dioxide power cycle  /  absorption power cycle  /  waste heat recovery  /  economic analysis  /  multi-objective optimization
Hao HU, Qianxin GUO, Li YANG, Xiaobing YU, Chenxi XUE, Yonglin LIU, Yanping XUE, Qingchuan YANG, Yuheng GU. Performance evaluation and comparison of novel combined power cycles consisting of partial pre-heating supercritical carbon dioxide power cycle and different absorption power cycles for waste heat recovery[J]. Thermal Power Generation, 2024 , 53 (7) : 101 -111 . DOI: 10.19666/j.rlfd.202403018
Funding
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  • Science and Technology Project of Guoshen Company of National Energy Group(GSKJ-23-44)
Appendix
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Year 2024 volume 53 Issue 7
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Article Info
doi: 10.19666/j.rlfd.202403018
  • Receive Date：2024-03-04
  • Online Date：2026-01-07
  • Published：2024-07-25
Article Data
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History
  • Received：2024-03-04
Funding
Science and Technology Project of Guoshen Company of National Energy Group(GSKJ-23-44)
Affiliations
    1.ShenhuaShendong Electric Power Co., Ltd. Technology Research Institute, Xi’an 710076, China
    2.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
    3.Xi’an TPRI Energy Conservation Technology Co., Ltd., Xi’an 710054, China
    4.Dianta Power Plant of Shenhua Shendong Electric Power Co., Ltd., Shenmu 719316, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202403018
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