Computational study of geothermal thermoelectric generators with phase change heat exchangers

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dc.contributor.authorCatalán Ros, Leyre
dc.contributor.authorAraiz Vega, Miguel
dc.contributor.authorAranguren Garacochea, Patricia
dc.contributor.authorAstrain Ulibarrena, David
dc.contributor.departmentIngeniaritzaeu
dc.contributor.departmentInstitute of Smart Cities - ISCen
dc.contributor.departmentIngenieríaes_ES
dc.date.accessioned2020-11-09T10:08:58Z
dc.date.available2022-10-01T23:00:12Z
dc.date.issued2020
dc.description.abstractThe use of thermoelectric generators with phase change heat exchangers has demonstrated to be an interesting and environmentally friendly alternative to enhanced geothermal systems (EGS) in shallow hot dry rock fields (HDR), since rock fracture is avoided. The present paper studies the possibilities of the former proposal in a real location: Timanfaya National Park (Canary Islands, Spain), one of the greatest shallow HDR fields in the world, with 5000 m2 of characterized geothermal anomalies presenting temperatures up to 500 °C at only 2 m deep. For this purpose, a computational model based on the thermal-electrical analogy has been developed and validated thanks to a real prototype, leading to a relative error of less than 8%. Based on this model, two prototypes have been designed and studied for two different areas within the park, varying the size of the heat exchangers and the number of thermoelectric modules installed. As a result, the potential of the solution is demonstrated, leading to an annual electricity generation of 681.53 MWh thanks to the scalability of thermoelectric generators. This generation is obtained without moving parts nor auxiliary consumption, thus increasing the robustness of the device and removing maintenance requirements.en
dc.description.sponsorshipThe authors would like to acknowledge the support of the Spanish State Research Agency and FEDER–UE under the grant RTC-2017-6628-3; as well as the FPU Program of the Spanish Ministry of Science, Innovation, and Universities (FPU16/05203).en
dc.embargo.lift2022-10-01
dc.embargo.terms2022-10-01
dc.format.extent19 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.doi10.1016/j.enconman.2020.113120
dc.identifier.issn0196-8904
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/38579
dc.language.isoengen
dc.publisherElsevieren
dc.relation.ispartofEnergy Conversion and Management 221 (2020) 113120en
dc.relation.publisherversionhttps://doi.org/10.1016/j.enconman.2020.113120
dc.rights© 2020 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectComputational modelen
dc.subjectThermoelectric generatoren
dc.subjectGeothermalen
dc.subjectHot dry rocken
dc.subjectPhase changeen
dc.subjectTimanfayaen
dc.titleComputational study of geothermal thermoelectric generators with phase change heat exchangersen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dspace.entity.typePublication
relation.isAuthorOfPublicationd19df8b0-c37b-494b-85cb-a28787bd46f9
relation.isAuthorOfPublicationb191fa17-dc29-406f-891a-6fe13ccc325a
relation.isAuthorOfPublicationb28d5c01-2691-468a-a076-5b6bb74ff88a
relation.isAuthorOfPublication5f626878-b8c6-4403-97ee-e14738ea30e2
relation.isAuthorOfPublication.latestForDiscoveryd19df8b0-c37b-494b-85cb-a28787bd46f9

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