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Modeling the effect of hygroscopic curtains on relative humidity for spaces air conditioned by DX split air conditioning system

Show simple item record Ghali K. Katanani O. Al-Hindi M.
dc.contributor.editor 2011 2017-10-04T11:15:48Z 2017-10-04T11:15:48Z 2011
dc.identifier 10.1016/j.enbuild.2011.04.017
dc.identifier.issn 03787788
dc.description.abstract The use of hygroscopic materials for moisture buffering is a passive way to moderate the variation of indoor humidity. Through absorption and desorption, surface materials in the indoor environment, such as curtains, carpets and wall paper, are able to dampen the moisture variations. The moisture buffering capacity of these materials may be used to improve the relative humidity of the indoor environment at reduced energy costs. The objectives of this paper are threefold. The first objective is to derive a theoretical model for the transient moisture transfer between a curtain system and the indoor air for the case where the curtain is placed in front of a wall. The second objective is to conduct experiments inside environmental chambers to validate the theoretical model and to test the ability of curtains to moderate indoor humidity. It is shown that the experimental results for the curtain moisture uptake and the relative humidity inside the chamber compared well with the model simulation results. The third and final objective is to test and evaluate the model under real environment conditions for a case study of a hygroscopic cotton curtain, placed in a typical office space in the city of Beirut with an area of 25 m2 that uses direct expansion (DX) air conditioning system. It is found that hygroscopic curtains maintain humidity of less than 65percent during part load operation compared to the upper limit of 70percent relative humidity when no curtain is used. On the other hand, it is found that the energy use, as determined by the daily electrical power consumption of the DX system, is almost the same for the two cases, (with and without a curtain), where approximately 20 kWh of energy input is required 13 kWh of sensible energy and 7 kWh of latent energy. © 2011 Elsevier B.V. All rights reserved.
dc.format.extent Pages: (2093-2100)
dc.language English
dc.publisher LAUSANNE
dc.relation.ispartof Publication Name: Energy and Buildings; Publication Year: 2011; Volume: 43; no. 9; Pages: (2093-2100);
dc.source Scopus
dc.title Modeling the effect of hygroscopic curtains on relative humidity for spaces air conditioned by DX split air conditioning system
dc.type Article
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 Katanani, O., Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon
dc.contributor.affiliation Al-Hindi, M., Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Beirut 1107-2020, Lebanon
dc.contributor.authorAddress Ghali, K.; Department of Mechanical Engineering, College of Engineering and Architecture, P.O. Box 1107-2020, Beirut, Lebanon; email:
dc.contributor.authorCorporate University: American University of Beirut; Faculty: Faculty of Engineering and Architecture; Department: Mechanical Engineering;
dc.contributor.authorDepartment Mechanical Engineering
dc.contributor.faculty Faculty of Engineering and Architecture
dc.contributor.authorInitials Ghali, K
dc.contributor.authorInitials Katanani, O
dc.contributor.authorInitials Al-Hindi, M
dc.contributor.authorReprintAddress Ghali, K (reprint author), Amer Univ Beirut, Dept Mech Engn, Coll Engn and Architecture, POB 11-0236, Beirut 11072020, Lebanon.
dc.contributor.authorUniversity American University of Beirut
dc.description.cited Bejan A., 1993, HEAT TRANSFER; Cerolini S, 2009, ENERG BUILDINGS, V41, P164, DOI 10.1016-j.enbuild.2008.08.006; DOE, 1982, LBL11353 DOE; Ghaddar N., 1998, INT J ENERG RES, V32, P523; GHADDAR N, 2008, J HEAT TRANSFER, V130, P1; Ghaddar N, 2005, J HEAT TRANS-T ASME, V127, P287, DOI 10.1115-1.1857949; GRIFFITHS WC, 1989, ENERG ENG, V86, P39; Hameury S, 2005, BUILD ENVIRON, V40, P1400, DOI 10.1016-j.buildenv.2004.10.017; Harriman L., 2001, HUMIDITY CONTROL DES; Henderson HI, 1996, ASHRAE TRAN, V102, P266; Hens HSLC, 2009, ASHRAE TRAN, V115, P88; Holm Andreas H, 2004, ASHRAE T, V110, P820; Laret L., 1980, P 7 INT C HEAT AIR C; Mara TA, 2005, J SOL ENERG-T ASME, V127, P294, DOI 10.1115-1.1862267; Morton W.E., 1975, PHYS PROPERTIES TEXT; ONEAL DL, 1991, ASHRAE TRAN, V97, P316; PENG CSP, 1984, J SOL ENERG-T ASME, V106, P133; Rode C, 2004, J THERMAL ENVELOPE B, V27, P221, DOI 10.1177-1097196304040543; Simonson CJ, 2004, ASHRAE T, V110, P804; Simonson CJ, 2002, INDOOR AIR, V12, P243, DOI 10.1034-j.1600-0668.2002.01128.x; STRAUBE J, 2002, ASHRAE J, P1; SVENNBERG K, 2006, TVBH1016; Toftum J, 1998, ENERG BUILDINGS, V28, P1, DOI 10.1016-S0378-7788(97)00017-0
dc.description.citedCount 2
dc.description.citedTotWOSCount 3
dc.description.citedWOSCount 2
dc.format.extentCount 8
dc.identifier.coden ENEBD
dc.identifier.scopusID 79960744388
dc.publisher.address PO BOX 564, 1001 LAUSANNE, SWITZERLAND
dc.relation.ispartOfISOAbbr Energy Build.
dc.relation.ispartOfIssue 9
dc.relation.ispartofPubTitle Energy and Buildings
dc.relation.ispartofPubTitleAbbr Energy Build.
dc.relation.ispartOfVolume 43
dc.source.ID WOS:000294834900006
dc.type.publication Journal
dc.subject.otherAuthKeyword DX air conditioning system
dc.subject.otherAuthKeyword Hygroscopic moisture absorption of cloth curtains
dc.subject.otherAuthKeyword Indoor relative humidity
dc.subject.otherAuthKeyword Modeling and experimentation
dc.subject.otherIndex Airconditioning systems
dc.subject.otherIndex Direct expansion
dc.subject.otherIndex Electrical power consumption
dc.subject.otherIndex Energy inputs
dc.subject.otherIndex Energy use
dc.subject.otherIndex Final objective
dc.subject.otherIndex Hygroscopic materials
dc.subject.otherIndex Hygroscopic moisture
dc.subject.otherIndex Indoor air
dc.subject.otherIndex Indoor environment
dc.subject.otherIndex Model simulation
dc.subject.otherIndex Moisture buffering capacity
dc.subject.otherIndex Moisture transfer
dc.subject.otherIndex Moisture uptake
dc.subject.otherIndex Moisture variation
dc.subject.otherIndex Moisture-buffering
dc.subject.otherIndex Office space
dc.subject.otherIndex Part load operation
dc.subject.otherIndex Real environments
dc.subject.otherIndex Reduced energy
dc.subject.otherIndex Relative humidities
dc.subject.otherIndex Surface materials
dc.subject.otherIndex Theoretical models
dc.subject.otherIndex Upper limits
dc.subject.otherIndex Absorption
dc.subject.otherIndex Air conditioning
dc.subject.otherIndex Computer simulation
dc.subject.otherIndex Desorption
dc.subject.otherIndex Environmental chambers
dc.subject.otherIndex Experiments
dc.subject.otherIndex Moisture control
dc.subject.otherIndex Office buildings
dc.subject.otherIndex Driers (materials)
dc.subject.otherKeywordPlus MOISTURE BUFFERING CAPACITY
dc.subject.otherKeywordPlus PART-LOAD CONDITIONS
dc.subject.otherKeywordPlus HEAT-PUMPS
dc.subject.otherKeywordPlus PERFORMANCE
dc.subject.otherWOS Construction and Building Technology
dc.subject.otherWOS Energy and Fuels
dc.subject.otherWOS Engineering, Civil

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