Entransy dissipation based optimization of a large-scale dry cooling system

doi:10.1016/j.applthermaleng.2017.06.117

CORC > 兰州理工大学 > 兰州理工大学

	Entransy dissipation based optimization of a large-scale dry cooling system
	Wei, Huimin 1; Du, Xiaoze 1,2; Yang, Lijun 1; Yang, Yongping 1
刊名	APPLIED THERMAL ENGINEERING
	2017-10
卷号	125 页码:254-265
关键词	Large-scale dry cooling tower System optimization Entransy dissipation Annual cost
ISSN号	1359-4311
DOI	10.1016/j.applthermaleng.2017.06.117
英文摘要	The natural draft dry cooling tower (NDDCT) with heat exchangers accounts for about 10 percent of the total investment of a power plant, so it is meaningful to optimize the geometric parameters to explore the potential that matching the cooling load of a power generating unit in the most cost effective way. The entransy dissipation equations of two typical irreversible heat transfer processes, including that the ambient air heated by heat exchangers and circulating water heated by the exhausted steam of turbine, are derived in this paper. Combined with the force balance equation of NDDCT, all parameters that may affect the performance and annual cost of a cooling system are took into consideration. Such constituted constraints are applied to the Lagrange multiplier optimization of such a system. Based on the mathematical relation and conditional extremum method, an optimization equation group aiming to obtain the minimum of total annual cost is constructed. Finally, a practical 600 MW power generating unit is taken as an example to illustrate the applications of entransy dissipation based optimization principle. The result indicates that total annual cost of the dry cooling system can drop from $6 420 643 to $5 665 660. (C) 2017 Elsevier Ltd. All rights reserved.
资助项目	national "973 Program" of China[2015CB251503]
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000410011200024
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33079]
专题	兰州理工大学能源与动力工程学院
通讯作者	Du, Xiaoze
作者单位	1.North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wei, Huimin,Du, Xiaoze,Yang, Lijun,et al. Entransy dissipation based optimization of a large-scale dry cooling system[J]. APPLIED THERMAL ENGINEERING,2017,125:254-265.
APA	Wei, Huimin,Du, Xiaoze,Yang, Lijun,&Yang, Yongping.(2017).Entransy dissipation based optimization of a large-scale dry cooling system.APPLIED THERMAL ENGINEERING,125,254-265.
MLA	Wei, Huimin,et al."Entransy dissipation based optimization of a large-scale dry cooling system".APPLIED THERMAL ENGINEERING 125(2017):254-265.