干旱区生态环境知识资源中心(Arid): A comprehensive thermal assessment of dry cooled supercritical CO2 power cycles

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DOI	10.1016/j.applthermaleng.2019.114645
	A comprehensive thermal assessment of dry cooled supercritical CO2 power cycles
	Ehsan, M. Monjurul 1; Duniam, Sam 1; Li, Jishun 2; Guan, Zhiqiang 1; Gurgenci, Hal 1; Klimenko, Alexander 1
通讯作者	Ehsan, M. Monjurul
来源期刊	APPLIED THERMAL ENGINEERING
ISSN	1359-4311
出版年	2020
卷号	166
英文摘要	In arid areas, dry cooling technology is a preferable alternate of wet cooling mainly owing to the scarcity of abundant water supply. However, the supercritical CO2 power cycle still offers considerable thermal performance even at higher ambient temperature using dry cooling. The novelty of this work is the exhaustive designing of dry cooler for supercritical CO2 cycles (recompression and partial cooling) in concentrating solar power application. Prior to the design of tower, a preliminary analysis is conducted in achieving the optimum main compressor inlet temperature (33 degrees C-recompression and 40 degrees C-partial cooling) at which the cycle delivers the maximal efficiency. The comparison is performed at same higher and lower pressure and for the partial cooling, the intermediate pressure is optimized. At relatively higher compressor inlet temperatures (above 50 degrees C), the partial cooling achieves higher efficiency while at lower temperatures (30-49 degrees C), the recompression shows superior performance. An iterative nodal method is used for the air-cooled finned tube heat exchanger units that takes account of the dramatic variation in thermodynamic properties of CO2 with the bulk temperature. Kroger's detailed methodology of designing dry cooler is adapted with the implementation of nodal approach for CO2 property variation. A dry cooling tower with 52.45 m height is essential for the recompression cycle, whereas the partial cooling requires two towers of the height of 35.4 m and 38.7 m. A thermal assessment is carried out on the dry cooler under various cycle fluid inlet temperatures and ambient temperatures. During hot and humid ambient conditions, lower compressor inlet temperatures (up to 53.1 degrees C) are obtained with the recompression cycle compared to partial cooling (up to 64.5 degrees C). In extreme climate condition of 50 degrees C air temperature, the recompression cycle provides superior thermal efficiency (46.5% against 45.5%). For future commercialization of dry cooled sCO(2) power plant, the recompression cycle is preferred due to its superior performance and lower capital cost for cooling tower design and solar field. The work demonstrates the impact of dry cooling tower design strategy in the context of cycle thermal assessment under various working condition.
英文关键词	Supercritical CO2 Concentrated solar Cooling system Heat exchange Recompression Partial cooling
类型	Article
语种	英语
国家	Australia ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000512220900044
WOS关键词	PRESSURE-DROP CHARACTERISTICS ; BRAYTON CYCLE ; THERMODYNAMIC ANALYSIS ; COOLING SYSTEM ; HEAT-TRANSFER ; GENERATION ; OPTIMIZATION ; PERFORMANCE ; DESIGN
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314060
作者单位	1.Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia; 2.Henan Univ Sci & Technol, Sch Mechatron Engn, Luoyang, Henan, Peoples R China
推荐引用方式 GB/T 7714	Ehsan, M. Monjurul,Duniam, Sam,Li, Jishun,et al. A comprehensive thermal assessment of dry cooled supercritical CO2 power cycles[J],2020,166.
APA	Ehsan, M. Monjurul,Duniam, Sam,Li, Jishun,Guan, Zhiqiang,Gurgenci, Hal,&Klimenko, Alexander.(2020).A comprehensive thermal assessment of dry cooled supercritical CO2 power cycles.APPLIED THERMAL ENGINEERING,166.
MLA	Ehsan, M. Monjurul,et al."A comprehensive thermal assessment of dry cooled supercritical CO2 power cycles".APPLIED THERMAL ENGINEERING 166(2020).