Numerical simulation of vertical ground heat exchangers: Intermittent operation in unsaturated soil conditions

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dc.contributor.authorChoi, Jung-Chanko
dc.contributor.authorLee, Seung-Raeko
dc.contributor.authorLee, Dae-Sooko
dc.date.accessioned2013-03-09T19:33:30Z-
dc.date.available2013-03-09T19:33:30Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2011-12-
dc.identifier.citationCOMPUTERS AND GEOTECHNICS, v.38, no.8, pp.949 - 958-
dc.identifier.issn0266-352X-
dc.identifier.urihttp://hdl.handle.net/10203/97304-
dc.description.abstractThe effect of varying the thermal properties of inhomogeneous unsaturated soil on the intermittent operation of a vertical ground heat exchanger (GHE) was simulated by a conjugate heat transfer simulation using a transient conductive heat transfer model. A three-phase soil model was used to introduce soil properties that vary with depth. The performance during the first few hours was significantly different from that of an analytical infinite line source model that assumes steady-state borehole conditions, although relatively good agreement was obtained thereafter. Unsaturated soil conditions afforded a 40% lower mean heat exchange rate than saturated conditions. This demonstrates the importance of considering unsaturated conditions in the design and performance evaluation of GHEs. (C) 2011 Elsevier Ltd. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER SCI LTD-
dc.subjectTHERMAL PERFORMANCE-
dc.subjectSYSTEMS-
dc.subjectMODEL-
dc.subjectPUMP-
dc.subjectPILE-
dc.titleNumerical simulation of vertical ground heat exchangers: Intermittent operation in unsaturated soil conditions-
dc.typeArticle-
dc.identifier.wosid000296114200003-
dc.identifier.scopusid2-s2.0-80052923259-
dc.type.rimsART-
dc.citation.volume38-
dc.citation.issue8-
dc.citation.beginningpage949-
dc.citation.endingpage958-
dc.citation.publicationnameCOMPUTERS AND GEOTECHNICS-
dc.identifier.doi10.1016/j.compgeo.2011.07.004-
dc.contributor.localauthorLee, Seung-Rae-
dc.contributor.nonIdAuthorLee, Dae-Soo-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorGround source heat pump-
dc.subject.keywordAuthorGround heat exchanger-
dc.subject.keywordAuthorNumerical simulation-
dc.subject.keywordAuthorUnsaturated soil-
dc.subject.keywordAuthorIntermittent operation-
dc.subject.keywordPlusTHERMAL PERFORMANCE-
dc.subject.keywordPlusSYSTEMS-
dc.subject.keywordPlusMODEL-
dc.subject.keywordPlusPUMP-
dc.subject.keywordPlusPILE-
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