Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7838
Title: Effects of alternative control strategies of water-evaporative cooling systems on energy efficiency and plume control : a case study
Authors: Wang, S 
Xu, X
Keywords: Control strategy
Energy efficiency
Evaporative cooling system
Plume control
Plume potential
Wet-dry cooling tower
Issue Date: 2008
Publisher: Pergamon Press
Source: Building and environment, 2008, v. 43, no. 11, p. 1973-1989 How to cite?
Journal: Building and environment 
Abstract: 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.
URI: http://hdl.handle.net/10397/7838
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2007.11.017
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