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Article: Cooling load reduction by using thermal mass and night ventilation

TitleCooling load reduction by using thermal mass and night ventilation
Authors
KeywordsAir-conditioning
Cooling load
Cooling load ratio
Night ventilation
Thermal mass
Issue Date2008
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/enbuild
Citation
Energy And Buildings, 2008, v. 40 n. 11, p. 2052-2058 How to Cite?
AbstractWe provide a quantitative understanding of the relationship between thermal mass and cooling load, i.e. the effect of thermal mass on energy consumption of air-conditioning in office buildings. A simple office-building model with air-conditioning at daytime and free cooling at nighttime is analyzed in detail to quantify the hourly and overall variation of cooling load of air-conditioning. As an important parameter, an increase of time constant can effectively reduce the cooling load, by as much as more than 60% when the time constant is more than 400 h. However, when the time constant is larger than 1000 h, a further increase may slightly increase the cooling load, as a too large time constant may also postpone the heat release of thermal mass until the daytime. For the most effective reduction of cooling load, the interior and exterior convective heat transfer numbers need to be matched. © 2008 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/59002
ISSN
2015 Impact Factor: 2.973
2015 SCImago Journal Rankings: 2.073
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong Kong SAR, China7154/05E
Funding Information:

The work was supported by a grant from the Research Grants Council of Hong Kong SAR, China (Project No. 7154/05E). The authors thank Dr. Pengcheng Xu for his assistance in mathematical derivations. The work is a part of the International Energy Agency (IEA) Annex 44 project on Integrating Environmentally Responsive Elements in Buildings.

References

 

DC FieldValueLanguage
dc.contributor.authorYang, Len_HK
dc.contributor.authorLi, Yen_HK
dc.date.accessioned2010-05-31T03:41:13Z-
dc.date.available2010-05-31T03:41:13Z-
dc.date.issued2008en_HK
dc.identifier.citationEnergy And Buildings, 2008, v. 40 n. 11, p. 2052-2058en_HK
dc.identifier.issn0378-7788en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59002-
dc.description.abstractWe provide a quantitative understanding of the relationship between thermal mass and cooling load, i.e. the effect of thermal mass on energy consumption of air-conditioning in office buildings. A simple office-building model with air-conditioning at daytime and free cooling at nighttime is analyzed in detail to quantify the hourly and overall variation of cooling load of air-conditioning. As an important parameter, an increase of time constant can effectively reduce the cooling load, by as much as more than 60% when the time constant is more than 400 h. However, when the time constant is larger than 1000 h, a further increase may slightly increase the cooling load, as a too large time constant may also postpone the heat release of thermal mass until the daytime. For the most effective reduction of cooling load, the interior and exterior convective heat transfer numbers need to be matched. © 2008 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/enbuilden_HK
dc.relation.ispartofEnergy and Buildingsen_HK
dc.subjectAir-conditioningen_HK
dc.subjectCooling loaden_HK
dc.subjectCooling load ratioen_HK
dc.subjectNight ventilationen_HK
dc.subjectThermal massen_HK
dc.titleCooling load reduction by using thermal mass and night ventilationen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0378-7788&volume=40&issue=11&spage=2052&epage=2058&date=2008&atitle=Cooling+load+reduction+by+using+thermal+mass+and+night+ventilationen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.enbuild.2008.05.014en_HK
dc.identifier.scopuseid_2-s2.0-50349085084en_HK
dc.identifier.hkuros161307en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-50349085084&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume40en_HK
dc.identifier.issue11en_HK
dc.identifier.spage2052en_HK
dc.identifier.epage2058en_HK
dc.identifier.isiWOS:000260042600009-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridYang, L=13806737800en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK

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