Critique of improved performance of air-cooled chillers with evaporative cooling

F. W. Yu, K. T. Chan, J. Yang, R. K.Y. Sit

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This article examines how evaporative cooling helps improve the energy performance of air-cooled chillers installed in refrigeration and central air-conditioning systems. Precooling of condenser air for heat rejection can be done by direct evaporative coolers and mist generators. The refrigeration effect and coefficient of performance of the chillers can be enhanced in various degrees by the devices under different outdoor conditions. Mist generators are more preferable because of their flexibility in retrofitting in existing chillers, the negligible flow resistance by mist and higher cooling effectiveness with limited water use. A higher difference between the dry bulb and wet bulb temperatures in future climates would call for a wider application of evaporative cooling for air-cooled chillers for sustainable development. Discussion has been given on how the mist generation rate should be regulated to complement condenser fan control. More research should be conducted to develop a mist nozzle layout to maximize cooling effectiveness while optimizing the control of condensing temperature for maximum performance.

Original languageEnglish
Title of host publication24th IIR International Congress of Refrigeration, ICR 2015
PublisherInternational Institute of Refrigeration
Pages3119-3125
Number of pages7
ISBN (Electronic)9782362150128
DOIs
Publication statusPublished - 2015
Event24th IIR International Congress of Refrigeration, ICR 2015 - Yokohama, Japan
Duration: 16 Aug 201522 Aug 2015

Publication series

NameRefrigeration Science and Technology
ISSN (Print)0151-1637

Conference

Conference24th IIR International Congress of Refrigeration, ICR 2015
Country/TerritoryJapan
CityYokohama
Period16/08/1522/08/15

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