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Performance analysis of Parabolic Trough Collectors with Double Glass Envelope

dc.creatorOsorio, J.D.spa
dc.creatorRivera-Alvarez, A.spa
dc.date.accessioned2018-10-31T13:09:03Z
dc.date.available2018-10-31T13:09:03Z
dc.date.created2019
dc.identifier.issn9601481
dc.identifier.urihttp://hdl.handle.net/11407/4841
dc.descriptionIn this work, the performance of Parabolic Trough Collectors (PTCs) with Double Glass Envelope (DGE) is studied. A one-dimensional model comprising optical and thermal analyses is developed. The effect of an Inner Glass Envelope (IGE), thermal emittance of the envelopes, and vacuum conditions in the two resulting annuli are analyzed in detail and compared with the performance of a traditional PTC. The incorporation of an additional envelope into a traditional PTC reduces heat losses. At high operating temperatures, the reduction in thermal losses achieved with the DGE PTC leads to a superior efficiency. It is found that an IGE having low emittance values could be used to reduce heat losses and replace the vacuum in conventional PTCs. In addition, in a DGE PTC, vacuum is more important in the annulus between the absorber pipe and the IGE. The effect of solar irradiance on the performance of a DGE PTC is also studied considering clear sky and partially cloudy sky day conditions. In general, higher solar irradiance values favor collectors' efficiency. Finally, the efficiency of a DGE PTC is analyzed considering a commercially architectural glass and a glass for solar applications. The DGE PTC with IGE made of a glass for solar applications exhibits higher performance than a traditional PTC at high temperatures. However, a detailed economic analysis is required in order to determine the total energy cost with the proposed DGE PTC concept. Using a DGE improves the collector efficiency at high temperatures especially during partially cloudy sky days. © 2018 Elsevier Ltdspa
dc.language.isoeng
dc.publisherElsevier Ltdspa
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85053207099&doi=10.1016%2fj.renene.2018.06.024&partnerID=40&md5=25163b132cad85c9ef7ba4bd3b552da6spa
dc.sourceScopusspa
dc.subjectDouble Glass Envelope (DGE)spa
dc.subjectEfficiencyspa
dc.subjectParabolic Trough Collector (PTC)spa
dc.subjectSolar irradiancespa
dc.subjectThermal emittancespa
dc.subjectThermal lossesspa
dc.subjectVacuum conditionsspa
dc.titlePerformance analysis of Parabolic Trough Collectors with Double Glass Envelopespa
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.publisher.programIngeniería en Energíaspa
dc.contributor.affiliationOsorio, J.D., Universidad de Medellín; Ingeniería Térmica Ltda;Rivera-Alvarez, A., Ingeniería Térmica Ltda; Fundación Ergonspa
dc.identifier.doi10.1016/j.renene.2018.06.024
dc.relation.citationvolume130
dc.relation.citationstartpage1092
dc.relation.citationendpage1107
dc.publisher.facultyFacultad de Ingenieríasspa
dc.relation.ispartofesRenewable Energyspa
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dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.type.driverinfo:eu-repo/semantics/article


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