Theoretical and experimental investigation of total equivalent temperature difference (TETD) values for building walls and flat roofs in Turkey

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dc.contributor.authorKaska, Oender
dc.contributor.authorYumrutas, Recep
dc.contributor.authorArpa, Orhan
dc.date.accessioned2024-04-24T16:10:50Z
dc.date.available2024-04-24T16:10:50Z
dc.date.issued2009
dc.departmentDicle Üniversitesien_US
dc.description.abstractThe aim of this study is to find time lag (TL), decrement factor (DF) and total equivalent temperature difference (TETD) values for multilayer walls and flat roofs of buildings using experimental and theoretical methods, and to compare the experimental results with theoretical ones. The TETD is a method for calculating cooling load due to heat gain from the walls or flat roofs, and it can be obtained using values of inside and outside air temperatures, solar radiation, TL and DF. The TL and DF depend on the highest and the lowest temperatures at the inner and outer surfaces of the walls or flat roofs, and the time periods involved in reaching these temperatures. Hence, two testing rooms each consisting of four multilayered walls and a flat roof, air conditioner, measuring elements are built to measure all required temperatures. The required temperatures, which are hourly inside and outside air temperatures, and surface temperatures of each structure layer, are measured in every minute during testing periods of the 2007 summer season of Gaziantep, Turkey. Hourly solar radiation values on the walls are computed using hourly measured solar radiation on a horizontal surface. The TL, DF and TETD values of eight different walls and two different flat roofs commonly used in Turkey are computed utilizing the measured temperature and solar radiation values. The computed values for the TI, DF and TETD are compared with theoretical results obtained numerically using periodic solution of one dimensional transient heat transfer problem for the same structures. (C) 2008 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThe Scientific and Technological Research Council of Turkey (TUBITAK) [106M315]en_US
dc.description.sponsorshipThis study is carried out in scope of 106M315 numbered research project supported by The Scientific and Technological Research Council of Turkey (TUBITAK). Hourly values of long term outside air temperatures and solar radiation flux for all the cities in Turkey are provided by the Turkish State Meteorological Service. The authors would like to thank TUBITAK for financial support and Turkish State Meteorological Service for providing meteorological data.en_US
dc.identifier.doi10.1016/j.apenergy.2008.09.010
dc.identifier.endpage747en_US
dc.identifier.issn0306-2619
dc.identifier.issn1872-9118
dc.identifier.issue5en_US
dc.identifier.scopus2-s2.0-58949083694
dc.identifier.scopusqualityQ1
dc.identifier.startpage737en_US
dc.identifier.urihttps://doi.org/10.1016/j.apenergy.2008.09.010
dc.identifier.urihttps://hdl.handle.net/11468/15143
dc.identifier.volume86en_US
dc.identifier.wosWOS:000263766400021
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoenen_US
dc.publisherElsevier Sci Ltden_US
dc.relation.ispartofApplied Energy
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectTotal Equivalent Temperature Differenceen_US
dc.subjectTime Lagen_US
dc.subjectDecrement Factoren_US
dc.subjectHeat Gainen_US
dc.subjectCooling Loaden_US
dc.titleTheoretical and experimental investigation of total equivalent temperature difference (TETD) values for building walls and flat roofs in Turkeyen_US
dc.titleTheoretical and experimental investigation of total equivalent temperature difference (TETD) values for building walls and flat roofs in Turkey
dc.typeArticleen_US

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