Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow

The circulating cooling water system is widely used in various industrial production fields, and its operating cost largely depends on external factors, such as ambient temperature and working medium flow. Considering the relative elevation of the heat exchanger, this study establishes a total syste...

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Autores principales:	Peng Wang, Jinling Lu, Qingsen Cai, Senlin Chen, Xingqi Luo
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	circulating cooling water system operating cost ambient temperature working medium flow optimization model optimal water supply temperature Technology T
Acceso en línea:	https://doaj.org/article/7455de03f0aa407e8490e3c7e838c4be
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spelling	oai:doaj.org-article:7455de03f0aa407e8490e3c7e838c4be2021-11-11T15:44:31ZAnalysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow10.3390/en142169031996-1073https://doaj.org/article/7455de03f0aa407e8490e3c7e838c4be2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6903https://doaj.org/toc/1996-1073The circulating cooling water system is widely used in various industrial production fields, and its operating cost largely depends on external factors, such as ambient temperature and working medium flow. Considering the relative elevation of the heat exchanger, this study establishes a total system operation cost analysis and optimization model based on the superstructure method. The model uses ambient dry bulb temperature, ambient wet bulb temperature, and working medium flow as random variables. Water supply temperature is adopted as the decision variable, and the minimum operating cost of the system is used as the objective function. An analysis of the effect of the three random variables on the operation cost shows that the effect of ambient dry bulb temperature on the operation cost is negligible, and the effect of ambient wet bulb temperature and working medium flow on the operation cost is significant. In addition, a control equation of water supply temperature is established to determine the “near optimal” operation, which is based on the correlation among ambient wet bulb temperature, working medium flow, and optimal water supply temperature. Then, the method is applied to a case system. The operating cost of the system is reduced by 22–31% at different times during the sampling day.Peng WangJinling LuQingsen CaiSenlin ChenXingqi LuoMDPI AGarticlecirculating cooling water systemoperating costambient temperatureworking medium flowoptimization modeloptimal water supply temperatureTechnologyTENEnergies, Vol 14, Iss 6903, p 6903 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	circulating cooling water system operating cost ambient temperature working medium flow optimization model optimal water supply temperature Technology T
spellingShingle	circulating cooling water system operating cost ambient temperature working medium flow optimization model optimal water supply temperature Technology T Peng Wang Jinling Lu Qingsen Cai Senlin Chen Xingqi Luo Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
description	The circulating cooling water system is widely used in various industrial production fields, and its operating cost largely depends on external factors, such as ambient temperature and working medium flow. Considering the relative elevation of the heat exchanger, this study establishes a total system operation cost analysis and optimization model based on the superstructure method. The model uses ambient dry bulb temperature, ambient wet bulb temperature, and working medium flow as random variables. Water supply temperature is adopted as the decision variable, and the minimum operating cost of the system is used as the objective function. An analysis of the effect of the three random variables on the operation cost shows that the effect of ambient dry bulb temperature on the operation cost is negligible, and the effect of ambient wet bulb temperature and working medium flow on the operation cost is significant. In addition, a control equation of water supply temperature is established to determine the “near optimal” operation, which is based on the correlation among ambient wet bulb temperature, working medium flow, and optimal water supply temperature. Then, the method is applied to a case system. The operating cost of the system is reduced by 22–31% at different times during the sampling day.
format	article
author	Peng Wang Jinling Lu Qingsen Cai Senlin Chen Xingqi Luo
author_facet	Peng Wang Jinling Lu Qingsen Cai Senlin Chen Xingqi Luo
author_sort	Peng Wang
title	Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
title_short	Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
title_full	Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
title_fullStr	Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
title_full_unstemmed	Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow
title_sort	analysis and optimization of cooling water system operating cost under changes in ambient temperature and working medium flow
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7455de03f0aa407e8490e3c7e838c4be
work_keys_str_mv	AT pengwang analysisandoptimizationofcoolingwatersystemoperatingcostunderchangesinambienttemperatureandworkingmediumflow AT jinlinglu analysisandoptimizationofcoolingwatersystemoperatingcostunderchangesinambienttemperatureandworkingmediumflow AT qingsencai analysisandoptimizationofcoolingwatersystemoperatingcostunderchangesinambienttemperatureandworkingmediumflow AT senlinchen analysisandoptimizationofcoolingwatersystemoperatingcostunderchangesinambienttemperatureandworkingmediumflow AT xingqiluo analysisandoptimizationofcoolingwatersystemoperatingcostunderchangesinambienttemperatureandworkingmediumflow
_version_	1718434090380689408

Analysis and Optimization of Cooling Water System Operating Cost under Changes in Ambient Temperature and Working Medium Flow

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