Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61735
Title: Optimizing water supply pump replacement in buildings of Hong Kong
Authors: Wong, LT 
Zhou, Y
Mui, KW 
Lau, CP
Keywords: Energy cost
High-rise buildings
Replacement schedule
Water supply pump
Issue Date: 2016
Publisher: SAGE Publications
Source: Building services engineering research and technology, 2016, v. 37, no. 4, p. 489-498 How to cite?
Journal: Building services engineering research and technology 
Abstract: This paper investigates the pump efficiency of existing water supply systems in high-rise buildings in Hong Kong and provides economic justification for pump replacement by comparing the long-term energy cost savings to the initial installation costs. Energy consumptions of water supply pumps were measured with the pump efficiencies determined from the water consumptions of 20 water supply systems in buildings. The study results indicate that for typical pump motor ratings that range from 1 to 40 kW in a high-rise water system, with new pump efficiencies and annual pump efficiency drops that range from 0.68 to 0.74 and 0.012 to 0.028 respectively, a shorter replacement period can be justified on energy cost grounds for larger pumps with greater annual efficiency drops. Practical application: This paper exhibits numerical solutions of replacement period justified on energy cost grounds for typical pump motor ratings that range from 1 to 40 kW in a high-rise water system, with new pump efficiencies and annual pump efficiency drops that range from 0.68 to 0.74 and 0.012 to 0.028, respectively.
URI: http://hdl.handle.net/10397/61735
ISSN: 0143-6244
EISSN: 1477-0849
DOI: 10.1177/0143624415612045
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