Effect of reference state on the performance of energy and exergy evaluation of geothermal district heating systems: Balcova example

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dc.contributor.authorOzgener, L
dc.contributor.authorHepbasli, A
dc.contributor.authorDincer, I
dc.date.accessioned2019-10-27T19:18:17Z
dc.date.available2019-10-27T19:18:17Z
dc.date.issued2006
dc.departmentEge Üniversitesien_US
dc.description.abstractIn this paper, we undertake a parametric study to investigate how varying reference temperature from 0 to 25 degrees C will affect the energy and exergy efficiencies of the Balcova geothermal district heating system (BGDHS) and develop two significant correlations (with a correlation coefficient of 0.99) that can be used for predicting the efficiencies. The exergy losses in the overall BGDHS are quantified and illustrated using exergy flow diagram particularly for a reference temperature of 11.4 degrees C for comparison purposes. This reference temperature is taken as an average value of the ambient temperatures measured during the past 5 years for the day of 2nd January to reflect the actual situation. The results show that the exergy losses within the system occur mainly due to the losses in pumps, heat exchangers, reinjection sections of the geothermal water back into reservoir and pipeline, and account for 1.75%, 8.84%, 14.20%, and 28.69%, respectively. In addition, we study energy and exergy efficiencies to determine the possibilities to improve the system, and energy and exergy efficiencies of the system are found to be 42.36% and 46.55%, respectively, for 2nd January 2004. (C) 2005 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.buildenv.2005.03.007
dc.identifier.endpage709en_US
dc.identifier.issn0360-1323
dc.identifier.issn0360-1323en_US
dc.identifier.issue6en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage699en_US
dc.identifier.urihttps://doi.org/10.1016/j.buildenv.2005.03.007
dc.identifier.urihttps://hdl.handle.net/11454/38552
dc.identifier.volume41en_US
dc.identifier.wosWOS:000235477600001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofBuilding and Environmenten_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectgeothermal energyen_US
dc.subjectenergyen_US
dc.subjectexergyen_US
dc.subjectefficiencyen_US
dc.subjectrenewable energyen_US
dc.titleEffect of reference state on the performance of energy and exergy evaluation of geothermal district heating systems: Balcova exampleen_US
dc.typeArticleen_US

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