Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8184
Title: Developing a simplified model for evaluating chiller-system configurations
Authors: Lee, WL 
Lee, SH
Keywords: Multiple chiller
Part-load performance
Statistical analysis
System configurations
Issue Date: 2007
Publisher: Pergamon Press
Source: Applied energy, 2007, v. 84, no. 3, p. 290-306 How to cite?
Journal: Applied energy 
Abstract: Optimizing system configuration is always an interest of building designers. By statistical analysis of the design data of 50 commercial buildings in Hong Kong and the performance data of 186 chiller models, it is ascertained that the chiller capacity and the fraction of full-load capacity have little influence on the system's energy performance. Following on this, this paper presents an evaluation of the energy performance of a multiple-chiller system consisting of 2-10 equally sized chillers. Such an analysis was based on performance data from three major manufacturers. It is found that the energy efficiency of multiple-chiller system improves with a higher number of chillers, and the maximum saving is estimated to be 9.5%. Based on the results of the study, a simplified model relating energy use with number of chillers has been established. The model can help designers more quickly determine how the energy efficiency can be weighted against other factors, such as the additional plant room space and the financial implications.
URI: http://hdl.handle.net/10397/8184
ISSN: 0306-2619
EISSN: 1872-9118
DOI: 10.1016/j.apenergy.2006.07.006
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