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Heat pump-Kalina cycle Carnot battery driven by extracted steam in coal-fired power station and its performance evaluation
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Yong YANG1, Shude XU2, Xiang ZHANG3, Yuanxiang ZHOU4, Yang LI4, Siyuan WANG3, Rui ZHU3, Bin WEN3, Ying ZOU5
Thermal Power Generation | 2025, 54(9) : 46 - 53
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Thermal Power Generation | 2025, 54(9): 46-53
• Special topic on energy storage and power generation coupling technology •
Heat pump-Kalina cycle Carnot battery driven by extracted steam in coal-fired power station and its performance evaluation
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Yong YANG1, Shude XU2, Xiang ZHANG3, Yuanxiang ZHOU4, Yang LI4, Siyuan WANG3, Rui ZHU3, Bin WEN3, Ying ZOU5
Affiliations
  • 1.State Power Hebei Dingzhou Power Generation Co., Ltd., Dingzhou 073099, China
  • 2.Zhejiang Provincial Energy Group Co., Ltd., Hangzhou 310007, China
  • 3.Xi’an Yitong Thermal Service Co., Ltd., Xi’an 710054, China
  • 4.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
  • 5.Shool of Foreign Studies, Xi’an Jiaotong University, Xi’an 710049, China
Published: 2025-09-25 doi: 10.19666/j.rlfd.202411250
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As an emerging large-scale electricity storage technology, the Carnot battery has the advantages of low cost, large capacity, and being free from geographical limitations. Aiming at the current situation that the low discharge cycle efficiency restrains further improvement of round-trip efficiency of the Carnot battery, combined with the heat demand of the thermally integrated Carnot battery and the relatively high discharge efficiency of the Kalina cycle, a heat pumped-Kalina cycle Carnot battery system driven by extraction steam of a coal-fired power station is proposed. A thermodynamic model of the Carnot battery system is established, and the influences of thermal energy storage temperature, temperature difference in thermal energy storage, and ammonia mass fraction on thermodynamic performance of the Carnot battery are mainly studied. The results show that, with different temperature differences of thermal energy storage and at different temperatures, the round-trip efficiency can reach 44.8%~108.0%. With the increase of the ammonia mass fraction, the round-trip efficiency will be significantly improved. However, when the ammonia mass fraction exceeds 90%, the efficiency will drop sharply, and the Kalina cycle is close to a one-component cycle. Therefore, when designing a Carnot battery based on the Kalina cycle, the ammonia mass fraction should be controlled within 80%~90%.

Carnot battery  /  Kalina cycle  /  heat pump  /  thermal integration  /  thermodynamic analysis
Yong YANG, Shude XU, Xiang ZHANG, Yuanxiang ZHOU, Yang LI, Siyuan WANG, Rui ZHU, Bin WEN, Ying ZOU. Heat pump-Kalina cycle Carnot battery driven by extracted steam in coal-fired power station and its performance evaluation[J]. Thermal Power Generation, 2025 , 54 (9) : 46 -53 . DOI: 10.19666/j.rlfd.202411250
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doi: 10.19666/j.rlfd.202411250
  • Receive Date：2024-11-13
  • Online Date：2026-03-05
  • Published：2025-09-25
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  • Received：2024-11-13
Affiliations
    1.State Power Hebei Dingzhou Power Generation Co., Ltd., Dingzhou 073099, China
    2.Zhejiang Provincial Energy Group Co., Ltd., Hangzhou 310007, China
    3.Xi’an Yitong Thermal Service Co., Ltd., Xi’an 710054, China
    4.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
    5.Shool of Foreign Studies, Xi’an Jiaotong University, Xi’an 710049, China
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表12种不同金属材料的力学参数
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Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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