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Design charts for combined chilled ceiling displacement ventilation system

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dc.contributor.author Ghaddar N.
dc.contributor.author Saadeh R.
dc.contributor.author Ghali K.
dc.contributor.author Keblawi A.
dc.contributor.editor
dc.date 2008
dc.date.accessioned 2017-10-04T11:16:07Z
dc.date.available 2017-10-04T11:16:07Z
dc.date.issued 2008
dc.identifier
dc.identifier.isbn
dc.identifier.issn 00012505
dc.identifier.uri http://hdl.handle.net/10938/15074
dc.description.abstract This paper proposes operational design charts for combined chilled ceiling (CC) displacement ventilation (DV) hybrid air conditioning system (CC-DV). The design charts were developed by performing a large number of simulations using a simplified transport plume multi-layer model of the CC-DV conditioned space. The simulation model results were validated by conducting a series of experiments that showed good agreement with the predictions of the simplified model of the stratification height, the CC load, and the room air vertical temperature gradient. The proposed design charts, like any chart in the literature, are based on the important parameter of the ratio of the CC cooling load to the total load (R), the thermal comfort represented by the temperature gradient (dT-dZ), and the amount of displaced air parameter (P = (Q-ṁ)). The design chart parameters include the temperature ranges of the supply air temperature and the chilled ceiling for any R in the feasible design regions where dT-dZ is less than 2.5 K-m and with the facility to read off the stratification height H and insure that it is above 1.2 m. The stratification height was selected as an additional criterion to the thermal comfort because in humid warm climates, designing the CC-DV system for a high stratification height might be quite costly. The CC-DV design charts have shown that R can be met by different P = [Q-ṁ) for different air supply temperature and chilled ceiling temperatures and that the stratification height is strongly correlated to P = (Q-ṁ) compared to air and ceiling temperatures. Two correlations were developed at high predictability for the stratification height and vertical temperature gradient dependence on room height and system operational parameters.
dc.format.extent
dc.format.extent Pages: (1-14)
dc.language English
dc.relation.ispartof Publication Name: ASHRAE Transactions; Conference Title: ASHRAE 2008 Winter Meeting; Conference Date: 19 January 2008 through 23 January 2008; Conference Location: New York, NY; Publication Year: 2008; Pages: (1-14);
dc.relation.ispartofseries
dc.relation.uri
dc.source Scopus
dc.subject.other
dc.title Design charts for combined chilled ceiling displacement ventilation system
dc.type Conference Paper
dc.contributor.affiliation Ghaddar, N., Department of Energy Studies, Lebanon
dc.contributor.affiliation Saadeh, R., Department of Mechanical Engineering, American University of Beirut, Lebanon
dc.contributor.affiliation Ghali, K., Department of Mechanical Engineering, Beirut Arab University, Lebanon
dc.contributor.affiliation Keblawi, A., Department of Mechanical Engineering, American University of Beirut, Lebanon
dc.contributor.authorAddress Ghaddar, N.; Department of Energy StudiesLebanon
dc.contributor.authorCorporate University: American University of Beirut; Faculty: Faculty of Engineering and Architecture; Department: Mechanical Engineering;
dc.contributor.authorDepartment Mechanical Engineering
dc.contributor.authorDivision
dc.contributor.authorEmail
dc.contributor.authorFaculty Faculty of Engineering and Architecture
dc.contributor.authorInitials
dc.contributor.authorOrcidID
dc.contributor.authorReprintAddress
dc.contributor.authorResearcherID
dc.contributor.authorUniversity American University of Beirut
dc.description.cited
dc.description.citedCount 3
dc.description.citedTotWOSCount
dc.description.citedWOSCount
dc.format.extentCount 14
dc.identifier.articleNo
dc.identifier.coden ASHTA
dc.identifier.pubmedID
dc.identifier.scopusID 79960450665
dc.identifier.url
dc.publisher.address
dc.relation.ispartofConference Conference Title: ASHRAE 2008 Winter Meeting : Conference Date: 19 January 2008 through 23 January 2008 , Conference Location: New York, NY.
dc.relation.ispartofConferenceCode 74245
dc.relation.ispartofConferenceDate 19 January 2008 through 23 January 2008
dc.relation.ispartofConferenceHosting
dc.relation.ispartofConferenceLoc New York, NY
dc.relation.ispartofConferenceSponsor
dc.relation.ispartofConferenceTitle ASHRAE 2008 Winter Meeting
dc.relation.ispartofFundingAgency
dc.relation.ispartOfISOAbbr
dc.relation.ispartOfIssue
dc.relation.ispartOfPart
dc.relation.ispartofPubTitle ASHRAE Transactions
dc.relation.ispartofPubTitleAbbr ASHRAE Trans
dc.relation.ispartOfSpecialIssue
dc.relation.ispartOfSuppl
dc.relation.ispartOfVolume
dc.source.ID
dc.type.publication Series
dc.subject.otherAuthKeyword
dc.subject.otherChemCAS
dc.subject.otherIndex Air supply
dc.subject.otherIndex Airconditioning systems
dc.subject.otherIndex Ceiling temperatures
dc.subject.otherIndex Chilled ceiling
dc.subject.otherIndex Cooling load
dc.subject.otherIndex Design charts
dc.subject.otherIndex Displacement ventilation
dc.subject.otherIndex Displacement ventilation system
dc.subject.otherIndex Feasible design
dc.subject.otherIndex Multilayer models
dc.subject.otherIndex Operational design
dc.subject.otherIndex Operational parameters
dc.subject.otherIndex Room air
dc.subject.otherIndex Simplified models
dc.subject.otherIndex Simulation model
dc.subject.otherIndex Supply air temperature
dc.subject.otherIndex Temperature gradient
dc.subject.otherIndex Temperature range
dc.subject.otherIndex Total load
dc.subject.otherIndex Vertical temperature gradients
dc.subject.otherIndex Warm climates
dc.subject.otherIndex Air conditioning
dc.subject.otherIndex Ceilings
dc.subject.otherIndex Computer simulation
dc.subject.otherIndex Graphic methods
dc.subject.otherIndex Thermal comfort
dc.subject.otherIndex Thermal gradients
dc.subject.otherIndex Ventilation
dc.subject.otherIndex Design
dc.subject.otherKeywordPlus
dc.subject.otherWOS


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