Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65934
Title: Cooling effectiveness of mist precooler for improving energy performance of air-cooled chiller
Authors: Yu, FW
Chan, KT
Yang, J
Sit, RKY
Keywords: Air-cooled chiller
Coefficient of performance
Mist precooling
Issue Date: 2016
Publisher: Vinča Institute of Nuclear Sciences
Source: Thermal science, 2016, v. 2016, p. 1-12 How to cite?
Journal: Thermal science 
Abstract: Mist is increasingly applied to precool outdoor air in heat rejection. This study investigates how the coefficient of performance (COP) of an air-cooled chiller varies with a mist precooler at different levels of cooling effectiveness. A multivariate regression model was developed to simulate the operating variables of an air-cooled chiller with mist precooling. The model was validated with typical performance data of an air-cooled centrifugal chiller. The COP would increase by up to 30%, depending on the cooling effectiveness and the wet bulb depression-the difference between the dry bulb and wet bulb temperatures of outdoor air. At a large wet bulb depression, the percentage increase of COP tended to correlate linearly with the chiller capacity. Yet at a small wet bulb depression, the dynamic control of condensing temperature resulted in a non-linear relationship between the percentage change of COP and the cooling effectiveness. Further experimental work is required to optimize cooling effectiveness for the maximum COP.
URI: http://hdl.handle.net/10397/65934
EISSN: 0354-9836
DOI: 10.2298/TSCI151112071Y
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