Anti-freezing of natural draft dry cooling system of power generation by water re-distribution during winter

doi:10.1016/j.ijheatmasstransfer.2019.119194

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	Anti-freezing of natural draft dry cooling system of power generation by water re-distribution during winter
	Wei, Huimin 1; Yang, Xiaoru 1; Ge, Zhihua 1; Yang, Lijun 1; Du, Xiaoze 2
刊名	International Journal of Heat and Mass Transfer
	2020-03-01
卷号	149
关键词	Cooling Cooling systems Cooling water Energy conservation Flow of water Freezing Lagrange multipliers Operating costs Thermoelectric equipment Anti-freezing Dry cooling systems Energy saving potential Entransy dissipation Freezing environment Lagrange multiplier method Thermal power generating units Waterside adjustments
ISSN号	00179310
DOI	10.1016/j.ijheatmasstransfer.2019.119194
英文摘要	The freezing risk of heat exchangers of the natural draft dry cooling system (NDDCs) in winter has great threaten on the safe and efficient operation of thermal power generating unit. This study concentrated on the potential of waterside re-distribution to relieve the adverse weather effects during winter. Based on the requirements of the thermal cycle and cooling system, a global control anti-freezing method with water flow distribution for NDDCs under crosswinds during winter was proposed. Taking the operation cost as the objective function, the Lagrange multiplier method combined with the so-called entransy dissipation analysis was employed to obtain the optimal results. A 660 MW supercritical coal-fired power generating unit was taken as an example to show the applications. The results indicated that energy saving potential of cooling water re-distributions increased with ambient natural wind, but also with the increase of total costs during hasher freezing environment. The saved consumption cost of coal would cover the growth of pump power. Compared with the previous research, the maximum savings of operation cost can reach 1.11 g/kWh after optimization. © 2019
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000538009600058
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115374]
专题	兰州理工大学能源与动力工程学院新能源学院
作者单位	1.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (North China Electric Power University), Ministry of Education, Beijing; 102206, China; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wei, Huimin,Yang, Xiaoru,Ge, Zhihua,et al. Anti-freezing of natural draft dry cooling system of power generation by water re-distribution during winter[J]. International Journal of Heat and Mass Transfer,2020,149.
APA	Wei, Huimin,Yang, Xiaoru,Ge, Zhihua,Yang, Lijun,&Du, Xiaoze.(2020).Anti-freezing of natural draft dry cooling system of power generation by water re-distribution during winter.International Journal of Heat and Mass Transfer,149.
MLA	Wei, Huimin,et al."Anti-freezing of natural draft dry cooling system of power generation by water re-distribution during winter".International Journal of Heat and Mass Transfer 149(2020).