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Design and off-design operating characteristics analysis of Brayton cycle cold end air-cooled heat exchanger
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Wei WANG1, Haoran FENG2, Na YUE3, Qing LUO1, Jianyuan ZHANG1, Ruyi GENG1, Guolong ZHANG1
Thermal Power Generation | 2024, 53(4) : 63 - 72
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Thermal Power Generation | 2024, 53(4): 63-72
• Thermal energy science research •
Design and off-design operating characteristics analysis of Brayton cycle cold end air-cooled heat exchanger
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Wei WANG1, Haoran FENG2, Na YUE3, Qing LUO1, Jianyuan ZHANG1, Ruyi GENG1, Guolong ZHANG1
Affiliations
  • 1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
  • 2.School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049,China
  • 3.CRRCGC Harbin Rolling Stock Co., Ltd., Harbin 150056, China
Published: 2024-04-25 doi: 10.19666/j.rlfd.202310161
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The gas cooler, as an essential heat exchange device in Brayton cycle system, has a significant influence on structural compactness and operational efficiency of the cycle system. The performance and influencing factors of a cross flow printed circuit heat exchanger (PCHE)-plate-fin gas cooler are analyzed. A calculation model is established for this type of heat exchanger, and a MATLAB program is written to verify its reliability. Based on this, the coolers are designed, and the power density is above 1 MW/m3, indicating the cooler is compact heat exchanger. Moreover, the design and performance analysis of the heat exchanger are carried out under varying working conditions, and the change law of the pressure drop and heat transfer performance of the gas cooler with the inlet state of the circulating working medium and cooling air is given. The pressure drop and heat transfer performance are compared when the working medium of the Brayton cycle is supercritical carbon dioxide, nitrogen and air. The results show that, the change of cold and hot fluid mass flow has the most obvious influence on the heat transfer performance. The research has reference significance for the design and operation of Brayton circulating air cooling heat exchangers.

Brayton cycle  /  air-cooled heat exchanger  /  off-design condition calculation  /  heat transfer performance  /  pressure drop performance
Wei WANG, Haoran FENG, Na YUE, Qing LUO, Jianyuan ZHANG, Ruyi GENG, Guolong ZHANG. Design and off-design operating characteristics analysis of Brayton cycle cold end air-cooled heat exchanger[J]. Thermal Power Generation, 2024 , 53 (4) : 63 -72 . DOI: 10.19666/j.rlfd.202310161
Funding
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  • National Key Research and Development Program(2019YFB1505400)
Appendix
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Year 2024 volume 53 Issue 4
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Article Info
doi: 10.19666/j.rlfd.202310161
  • Receive Date：2023-10-08
  • Online Date：2026-03-06
  • Published：2024-04-25
Article Data
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History
  • Received：2023-10-08
Funding
National Key Research and Development Program(2019YFB1505400)
Affiliations
    1.Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710054, China
    2.School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049,China
    3.CRRCGC Harbin Rolling Stock Co., Ltd., Harbin 150056, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202310161
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
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Number of
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Percentage 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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