Effects of alternative control strategies of water-evaporative cooling systems on energy efficiency and plume control: A case study

被引：12
|
作者：
Wang, Shengwei [1 ]
Xu, Xinhua [1 ,2 ]
机构：
[1] Hong Kong Polytech Univ, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China
[2] Huazhong Univ Sci & Technol, Dept Bldg Environm & Serv Engn, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China
来源：
BUILDING AND ENVIRONMENT | 2008年 / 43卷 / 11期
关键词：
evaporative cooling system; control strategy; energy efficiency; plume potential; plume control; wet-dry cooling tower;
D O I：
10.1016/j.buildenv.2007.11.017
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper reports the evaluations of energy efficiency, plume potential as well as plume control of a huge chiller plant using water-evaporative cooling towers for heat rejection for a super high-rising commercial office building in a subtropical region of Hong Kong. The evaluations were carried out in a dynamic Transient Simulation Program (TRNSYS)-based simulation platform using alternative control strategies including set-point control logics of the supply cooling water temperature and cooling tower fan modulation control methods as well as different number control means of cooling towers. The results show that different control strategies have significant effects on the energy efficiency of the chiller plant. The quantification of the energy efficiency demonstrates significant energy-saving potential by using advanced technologies for implementing optimal control strategies in this cooling system. The results also reveal that the plume may occur frequently in spring and summer seasons and occasionally in other months due to the odd subtropical weather conditions. Control strategies also have significant effects on the frequency of the plume occurrence. The effective energy efficiency control and effective plume control using wet-dry (i.e., hybrid) cooling towers are also discussed. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1973 / 1989
页数：17
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