Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/9989
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dc.contributorDepartment of Building Services Engineeringen_US
dc.contributorDepartment of Health Technology and Informaticsen_US
dc.creatorYik, FWHen_US
dc.creatorLai, JHKen_US
dc.creatorFong, NKen_US
dc.creatorLeung, PHMen_US
dc.creatorYuen, PLen_US
dc.date.accessioned2015-07-14T01:28:04Z-
dc.date.available2015-07-14T01:28:04Z-
dc.identifier.issn0143-6244en_US
dc.identifier.urihttp://hdl.handle.net/10397/9989-
dc.language.isoenen_US
dc.publisherSAGE Publicationsen_US
dc.rightsThis is the accepted version of the publication Yik FW, Lai JH, Fong N, Leung PH, Yuen P. A case study on the application of air- and water-cooled oil-free chillers to hospitals in Hong Kong. Building Services Engineering Research and Technology. 2012;33(3):263-279. Copyright © The Chartered Institution of Building Services Engineers 2011. DOI: 10.1177/0143624411408034en_US
dc.titleA case study on the application of air- and water-cooled oil-free chillers to hospitals in Hong Kongen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage263en_US
dc.identifier.epage279en_US
dc.identifier.volume33en_US
dc.identifier.issue3en_US
dc.identifier.doi10.1177/0143624411408034en_US
dcterms.abstractA comparison study on using air-cooled and water-cooled conventional and oil-free chillers in hospitals in Hong Kong is reported. The study commenced with a comprehensive literature review to reaffirm the effectiveness of recommended precaution measures for containing the risk of Legionnaires' disease (LD) associated with using cooling towers. Numerical performance models for oil-free chillers established for use in the study are presented. Based on recorded cooling demands of two existing hospitals, the life-cycle energy consumption and cost of system options involving different combinations of heat rejection method and chiller type were evaluated, compared and discussed. The results show that water-cooled air-conditioning systems with conventional chillers and cooling towers are still more energy efficient than air-cooled systems with oil-free chillers. Water-cooled oil-free chillers may become an economically viable choice when their price is lowered in future. Pilot installation is recommendable, as it would allow the reliability and maintainability of the new oil-free chillers to be ascertained.Practical applications: Findings of the literature review reaffirmed the effectiveness of measures recommended in contemporary guidelines for LD prevention, which would ease the mind of owners, designers and operation and maintenance personnel in regard of using cooling towers in hospitals. The numerical models for oil-free chillers presented in the paper are useful for evaluation of the energy consumption of this new type of chiller and for comparison with other types of chillers. The study approach described in the paper, including the energy consumption prediction and life-cycle cost evaluation methods, provides a useful framework for similar studies.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationBuilding services engineering research and technology, 1 Aug. 2012, v. 33, no. 3, p. 263-279en_US
dcterms.isPartOfBuilding services engineering research and technologyen_US
dcterms.issued2012-08-01-
dc.identifier.isiWOS:000306176200002-
dc.identifier.scopus2-s2.0-84863705966-
dc.identifier.eissn1477-0849en_US
dc.identifier.rosgroupidr56384-
dc.description.ros2011-2012 > Academic research: refereed > Publication in refereed journalen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumbera0861-n15-
dc.description.fundingSourceSelf-fundeden_US
dc.description.pubStatusPublisheden_US
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