干旱区生态环境知识资源中心(Arid): Modeling and analysis of air-cooled heat exchanger integrated with supercritical carbon dioxide recompression Brayton cycle

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DOI	10.1016/j.enconman.2021.113895
	Modeling and analysis of air-cooled heat exchanger integrated with supercritical carbon dioxide recompression Brayton cycle
	Khatoon, Saboora; Ishaque, Shehryar; Kim, Man-Hoe
通讯作者	Kim, MH (corresponding author), Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea.
来源期刊	ENERGY CONVERSION AND MANAGEMENT
ISSN	0196-8904
EISSN	1879-2227
出版年	2021
卷号	232
英文摘要	This paper investigates the thermal performance of the recompression supercritical carbon dioxide power cycle integrated with a direct air-cooled heat exchanger. The desirable attributes for economical concentrated solar power plants are their integration ability with thermal energy storage and to accommodate dry cooling. The expressively influencing parameters such as compressor inlet temperature, pressure, and split mass fraction have been investigated for cycle maximum efficiency under arid climatic conditions. The cooling process of supercritical carbon dioxide, unlike steam condensation, is sensible heat transfer with the non-linear variation of thermophysical properties. Effective, efficient, and affordable heat exchanger technology is crucial for the deployment of supercritical carbon dioxide Brayton power cycles in concentrated solar power plants. A MATLAB code has been developed for an air-cooled heat exchanger with multi-pass sub heat exchanger approach to overcome the inevitable temperature variations at the extreme end of the gas cooler. A two dimensional discretization methodology is used to model the heat exchanger to accommodate the rapidly varying isobaric heat capacity in the critical temperature region. The heat transfer and pressure drop performance are calculated using empirical correlations for the Nusselt number and friction factor for each sub-heat exchanger. With the increased contact time of cooling and process fluid, the desired gas cooler outlet temperature of 33.5 degrees C is achieved by rejecting 823.76 kW, 359.5 kW, and 219.46 kW amount of heat from each sub-heat exchanger, respectively. The results of this work are of significance for the design of the air-cooled heat exchanger for the supercritical carbon dioxide power generation system.
英文关键词	Supercritical carbon dioxide recompression Brayton cycle Air-cooled heat exchanger Heat transfer Pressure drop
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000623942500002
WOS类目	Thermodynamics ; Energy & Fuels ; Mechanics
WOS研究方向	Thermodynamics ; Energy & Fuels ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368943
作者单位	[Kim, Man-Hoe] Kyungpook Natl Univ, Sch Mech Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, IEDT, Daegu 41566, South Korea
推荐引用方式 GB/T 7714	Khatoon, Saboora,Ishaque, Shehryar,Kim, Man-Hoe. Modeling and analysis of air-cooled heat exchanger integrated with supercritical carbon dioxide recompression Brayton cycle[J],2021,232.
APA	Khatoon, Saboora,Ishaque, Shehryar,&Kim, Man-Hoe.(2021).Modeling and analysis of air-cooled heat exchanger integrated with supercritical carbon dioxide recompression Brayton cycle.ENERGY CONVERSION AND MANAGEMENT,232.
MLA	Khatoon, Saboora,et al."Modeling and analysis of air-cooled heat exchanger integrated with supercritical carbon dioxide recompression Brayton cycle".ENERGY CONVERSION AND MANAGEMENT 232(2021).