Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30992
Title: Optimum load sharing strategy for multiple-chiller systems serving air-conditioned buildings
Authors: Yu, FW
Chan, KT 
Keywords: Air-cooled screw chiller
Multiple-chiller system
Optimum load sharing
Issue Date: 2007
Publisher: Pergamon Press
Source: Building and environment, 2007, v. 42, no. 4, p. 1581-1593 How to cite?
Journal: Building and environment 
Abstract: Many central cooling systems in air-conditioned buildings have multiple chillers to meet various cooling load requirements. This paper further develops optimum load sharing strategies for the chillers in order to maximize their aggregate coefficient of performance (COP). Based on the part load performance curves of air-cooled screw chillers, it is ascertained that for two equally sized chillers operating, one should carry a full load and the other should be partially loaded to meet the system load. When two chillers of different sizes are running, the larger chiller should be fully loaded and the smaller chiller should operate at part load in order that their combined capacity satisfies the system load. Such an uneven load sharing strategy for achieving maximum COP is independent of ambient conditions and the control of condensing temperature. The variable primary flow of chilled water should be applied to chillers in order to implement the strategy. The results of this paper are useful in developing low-energy chiller plants.
URI: http://hdl.handle.net/10397/30992
ISSN: 0360-1323
EISSN: 1873-684X
DOI: 10.1016/j.buildenv.2006.01.006
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