Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17426
Title: Simulation and electricity savings estimation of air-cooled centrifugal chiller system with mist pre-cooling
Authors: Yu, FW
Chan, KT 
Keywords: Air-cooled chiller
Coefficient of performance
Electricity consumption
Water mist
Issue Date: 2010
Publisher: Elsevier Sci Ltd
Source: Applied Energy, 2010, v. 87, no. 4, p. 1198-1206 How to cite?
Journal: Applied Energy 
Abstract: This paper analyses how to apply mist pre-cooling coupled with condensing temperature control to enhance the coefficient of performance (COP) of an air-cooled chiller system and hence achieve electricity savings. A modified DOE-2.1E chiller model was developed to predict the change of chiller COP due to various set points of condensing temperature and pre-cooling of air stream entering the condenser. The model was calibrated by using manufacturer's data and used to estimate the annual electricity consumption of a chiller system serving an office building under four operating schemes: traditional head pressure control (HPC); HPC with a fixed mist generation rate; condensing temperature control (CTC) with a fixed mist generation rate; CTC with an optimal mist generation rate. It was estimated that using optimal mist control with CTC could achieve a 19.84% reduction in the annual electricity consumption of the system. Considerations when using mist pre-cooling to maximize electricity savings have been discussed.
URI: http://hdl.handle.net/10397/17426
DOI: 10.1016/j.apenergy.2009.08.023
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