Energy performance assessment and optimization of campus building

Pao Yue-kong Library Electronic Theses Database

Energy performance assessment and optimization of campus building

 

Author: Li, Yuyuan
Title: Energy performance assessment and optimization of campus building
Degree: M.Eng.
Year: 2015
Subject: Buildings -- Energy conservation.
Buildings -- Energy consumption.
Air conditioning -- Energy conservation.
Air conditioning -- Energy consumption.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Building Services Engineering
Pages: ix, 59 pages : illustrations (some color)
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2826122
URI: http://theses.lib.polyu.edu.hk/handle/200/8218
Abstract: This dissertation presents energy performance assessment and optimal control strategies for The Hong Kong Polytechnic University Phase 5 buildings. New water-cooled chillers replaced old air-cooled chillers of Phase 5 buildings. For the new chiller plant energy performance assessment, BMS measurement-based method was used. For the improvement of the building central chilling system, the operation schedule and cooling tower sequence were mainly concerned. According to new chiller plant energy analysis of second half year of 2014, the new chiller plant energy consumption of 2014 was much lower than that in 2013, which energy saving counted 249,431 KWh and occupied 34% for the total energy use of 2013. Though the analysis of CDD, the cooling demand of 2014 was higher than that in 2013. Obviously, the new chiller plant saved energy without the optimal control. The maximum monthly energy saving appeared in Nov. 2014, which saved 42% for the total chiller plant energy use of 2013. Chilled water pump and cooling tower fan performed at required condition under the high load condition. Their control strategy was improved under part load condition. And the operation schedule and cooling tower sequence were considered to be enhanced. It was assumed that new water-cooled chillers would work at night mode instead of old air-cooled chillers during Oct. to Dec. 2014. Energy reduction would be 156,501 KWh, which accounted for average 44.6% of the energy use of old chiller plant. The availability of operation and power information has restricted the search of energy saving measures.

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