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Effective desiccant dehumidification system with two-stage evaporative cooling for hot and humid climates

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dc.contributor.author El Hourani M.
dc.contributor.author Ghali K.
dc.contributor.author Ghaddar N.
dc.contributor.editor
dc.date 2014
dc.date.accessioned 2017-10-04T11:15:58Z
dc.date.available 2017-10-04T11:15:58Z
dc.date.issued 2014
dc.identifier 10.1016/j.enbuild.2013.09.040
dc.identifier.isbn
dc.identifier.issn 03787788
dc.identifier.uri http://hdl.handle.net/10938/14964
dc.description.abstract This study examines the design and operation of a hybrid air conditioning system that uses 100percent fresh air and integrates a solid desiccant dehumidification system with a two-stage evaporative cooling system to optimize the system operation with respect to energy and water consumption while maintaining occupant thermal comfort. The first stage consists of cooling a fraction of the dehumidified air stream using an evaporative cooling pad, mixing the cooled air with the remaining bypassed air fraction and then supplying it to the space in order to minimize water consumption and limit the indoor relative humidity to acceptable levels. The second stage consists of locally cooling the occupant's microclimate using a personalized evaporative cooler (PEC) that will allow for higher room bulk air temperatures. The system was implemented in an office space in Beirut and the optimization was carried using a derivative free genetic algorithm that handled three variables: the regeneration temperature; the air mass flow rate; and the fraction of air entering the evaporative cooler. The two-stage system achieved a 16.15percent reduction in energy consumption and a 26.93percent reduction in water consumption compared to a single-stage evaporative cooling system at the same thermal comfort level.© 2013 Published by Elsevier B.V.
dc.format.extent
dc.format.extent Pages: (329-338)
dc.language English
dc.publisher LAUSANNE
dc.relation.ispartof Publication Name: Energy and Buildings; Publication Year: 2014; Volume: 68; part A; Pages: (329-338);
dc.relation.ispartofseries
dc.relation.uri
dc.source Scopus
dc.subject.other
dc.title Effective desiccant dehumidification system with two-stage evaporative cooling for hot and humid climates
dc.type Article
dc.contributor.affiliation El Hourani, M., Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon
dc.contributor.affiliation Ghali, K., Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon
dc.contributor.affiliation Ghaddar, N., Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon
dc.contributor.authorAddress Ghaddar, N.; Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon; email: farah@aub.edu.lb
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 farah@aub.edu.lb
dc.contributor.authorFaculty Faculty of Engineering and Architecture
dc.contributor.authorInitials El Hourani, M
dc.contributor.authorInitials Ghali, K
dc.contributor.authorInitials Ghaddar, N
dc.contributor.authorOrcidID
dc.contributor.authorReprintAddress Ghaddar, N (reprint author), Amer Univ Beirut, Dept Mech Engn, POB 11-0236, Beirut 11072020, Lebanon.
dc.contributor.authorResearcherID
dc.contributor.authorUniversity American University of Beirut
dc.description.cited ASHRAE, 2001, ASHRAE FUND; Audah N, 2011, APPL ENERG, V88, P3726, DOI 10.1016-j.apenergy.2011.04.028; Beccali M, 2003, INT J ENERG RES, V27, P17, DOI 10.1002-er.856; Chakroun W, 2011, ENERG BUILDINGS, V43, P3250, DOI 10.1016-j.enbuild.2011.08.026; Duffie J., 2003, SOLAR ENG THERMAL PR; El-Refaie MF, 2009, BUILD ENVIRON, V44, P826, DOI 10.1016-j.buildenv.2008.05.020; Hammoud M., 2012, OPTIMIZED OPERATION; Keblawi A, 2011, ENERG BUILDINGS, V43, P1359, DOI 10.1016-j.enbuild.2011.01.021; Kulkarni R.K., 2011, INT J ADV ENG SCI TE, V10, P239; Malli A, 2011, ENERG CONVERS MANAGE, V52, P2598, DOI 10.1016-j.enconman.2010.12.015; Salloum M, 2007, INT J THERM SCI, V46, P371, DOI 10.1016-j.ijthermalsci.2006.06.017; U.S. Department of Energy, 2012, BUILD EN DAT BOOK TA; Wang K., 2000, HDB AIR CONDITIONING; Wright JA, 2002, ENERG BUILDINGS, V34, P959, DOI 10.1016-S0378-7788(02)00071-3; Yassine B., 2012, ENERG BUILDINGS, V55, P613; Zhang H, 2010, BUILD ENVIRON, V45, P389, DOI 10.1016-j.buildenv.2009.06.015
dc.description.citedCount 1
dc.description.citedTotWOSCount 0
dc.description.citedWOSCount 0
dc.format.extentCount 10
dc.identifier.articleNo
dc.identifier.coden ENEBD
dc.identifier.pubmedID
dc.identifier.scopusID 84886993535
dc.identifier.url
dc.publisher.address PO BOX 564, 1001 LAUSANNE, SWITZERLAND
dc.relation.ispartofConference
dc.relation.ispartofConferenceCode
dc.relation.ispartofConferenceDate
dc.relation.ispartofConferenceHosting
dc.relation.ispartofConferenceLoc
dc.relation.ispartofConferenceSponsor
dc.relation.ispartofConferenceTitle
dc.relation.ispartofFundingAgency
dc.relation.ispartOfISOAbbr Energy Build.
dc.relation.ispartOfIssue
dc.relation.ispartOfPart A
dc.relation.ispartofPubTitle Energy and Buildings
dc.relation.ispartofPubTitleAbbr Energy Build.
dc.relation.ispartOfSpecialIssue
dc.relation.ispartOfSuppl
dc.relation.ispartOfVolume 68
dc.source.ID WOS:000329885300035
dc.type.publication Journal
dc.subject.otherAuthKeyword Desiccant dehumidification
dc.subject.otherAuthKeyword Energy efficiency
dc.subject.otherAuthKeyword Evaporative cooling
dc.subject.otherAuthKeyword Thermal comfort
dc.subject.otherChemCAS
dc.subject.otherIndex Desiccant dehumidification
dc.subject.otherIndex Desiccant dehumidification systems
dc.subject.otherIndex Design and operations
dc.subject.otherIndex Evaporative coolers
dc.subject.otherIndex Evaporative cooling
dc.subject.otherIndex Hot and humid climate
dc.subject.otherIndex Regeneration temperature
dc.subject.otherIndex Thermal comfort level
dc.subject.otherIndex Driers (materials)
dc.subject.otherIndex Energy efficiency
dc.subject.otherIndex Evaporation
dc.subject.otherIndex Genetic algorithms
dc.subject.otherIndex Humidity control
dc.subject.otherIndex Office buildings
dc.subject.otherIndex Optimization
dc.subject.otherIndex Thermal comfort
dc.subject.otherIndex Water supply
dc.subject.otherIndex Evaporative cooling systems
dc.subject.otherKeywordPlus PERFORMANCE
dc.subject.otherKeywordPlus MODELS
dc.subject.otherWOS Construction and Building Technology
dc.subject.otherWOS Energy and Fuels
dc.subject.otherWOS Engineering, Civil


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