Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17299
Title: Optimizing condenser fan control for air-cooled centrifugal chillers
Authors: Yu, FW
Chan, KT 
Keywords: Air-cooled chiller
Centrifugal compressor
Coefficient of performance
Electricity consumption
Issue Date: 2008
Publisher: Elsevier Masson
Source: International journal of thermal sciences, 2008, v. 47, no. 7, p. 942-953 How to cite?
Journal: International journal of thermal sciences 
Abstract: The current design and operation of air-cooled condensers can cause a significant decrease in chiller performance under part load conditions. This paper demonstrates optimal condenser fan control to improve the coefficient of performance (COP) of air-cooled chillers. This control involves identifying the optimum set point of condensing temperature with the optimized power relationships of the compressors and condenser fans and enhancing the airflow and heat transfer area of the condensers. An example application of this control for an air-cooled centrifugal chiller indicated that the COP could increase by 11.4-237.2%, depending on the operating conditions. Such the increase of the COP results in a reduction of up to 14.1 kWh/m2, or 27.3% in the annual electricity consumption per unit A/C floor area of chillers, given that the chillers serve an office building requiring an annual cooling energy per unit A/C floor area of 173.3 kWh/m2. The simulation results of this study will give HVAC engineers a better understanding of how to optimize the design and operation of air-cooled chillers.
URI: http://hdl.handle.net/10397/17299
ISSN: 1290-0729
DOI: 10.1016/j.ijthermalsci.2007.07.018
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