Enhanced behaviour of a passive thermoelectric generator with phase change heat exchangers and radiative cooling

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dc.contributor.authorAstrain Ulibarrena, David
dc.contributor.authorJaramillo-Fernández, Juliana
dc.contributor.authorAraiz Vega, Miguel
dc.contributor.authorFrancone, Achille
dc.contributor.authorCatalán Ros, Leyre
dc.contributor.authorJacobo-Martín, Alejandra
dc.contributor.authorAlegría Cía, Patricia
dc.contributor.authorSotomayor-Torres, Clivia M.
dc.contributor.departmentIngenieríaes_ES
dc.contributor.departmentIngeniaritzaeu
dc.contributor.departmentInstitute of Smart Cities - ISCen
dc.contributor.funderUniversidad Pública de Navarra / Nafarroako Unibertsitate Publikoaes
dc.date.accessioned2023-04-27T16:44:15Z
dc.date.available2023-04-27T16:44:15Z
dc.date.issued2023
dc.date.updated2023-04-27T16:37:17Z
dc.description.abstractHeat exchangers are essential to optimize the efficiency of Thermoelectric Generators (TEGs), and heat pipes without fans have proven to be an advantageous design as it maintains the characteristic robustness of thermoelectricity, low maintenance and lack of moving parts. However, the efficiency of these heat exchangers decreases under natural convection conditions, reducing their heat transfer capacity and thus thermoelectric power production. This work reports on a novel heat exchanger that combines for the first time, phase change and radiative cooling in a thermoelectric generator to improve its efficiency and increase the production of electrical energy, specially under natural convection. For this, two thermoelectric generators with heat-pipes on their cold sides have been tested: one with the radiative coating and the other without it. Their thermal resistances have been determined and the electric power output was compared under different working conditions, namely, natural convection and forced convection indoors and outdoors. The experimental tests show a clear reduction of the heat exchanger thermal resistance thanks to the radiative coating and consequently, an increase of electric production 8.3 % with outdoor wind velocities of 1 m/s, and up to 54.8 % under free convection conditions. The application of the radiative surface treatment is shown to result in a more stable electrical energy production, suppressing the drastic decrease in the generated electric power that occurs in thermoelectric generators when they work under free convection.en
dc.description.sponsorshipThe authors acknowledge the support of the Spanish Ministry of Science, Innovation and Universities, and the European Regional Development Fund , under grants PID2021-124014OB-I00 (VIVOTEG), TED2021-129359B-I00 (GEOTEG), PGC2018-101743-B-I00 (SIP) and RTI2018-093921-A-C44 (SMOOTH). Open access funding provided by Universidad Pública de Navarra.en
dc.format.mimetypeapplication/pdfen
dc.format.mimetypeapplication/msworden
dc.identifier.citationAstrain, D., Jaramillo-Fernandez, J., Araiz, M., Francone, A., Catalán, L., Jacobo-Martín, A., Alegría, P., & Sotomayor-Torres, C. M. (2023). Enhanced behaviour of a passive thermoelectric generator with phase change heat exchangers and radiative cooling. Applied Thermal Engineering, 225, 120162. https://doi.org/10.1016/j.applthermaleng.2023.120162en
dc.identifier.doi10.1016/j.applthermaleng.2023.120162
dc.identifier.issn1359-4311
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/45186
dc.language.isoengen
dc.publisherElsevieren
dc.relation.ispartofApplied Thermal Engineering 225 (2023) 120162en
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI//PID2021-124014OB-I00 (VIVOTEG)/
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI//TED2021-129359B-I00 (GEOTEG)/
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-101743-B-I00/ES/
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-093921-A-C44/ES/
dc.relation.publisherversionhttps://doi.org/10.1016/j.applthermaleng.2023.120162
dc.rights© 2023 The Author(s). This is an open access article under the CC BY-NC-ND license.en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectRadiative coolingen
dc.subjectHeat-pipeen
dc.subjectThermoelectric generatoren
dc.subjectThermal resistanceen
dc.titleEnhanced behaviour of a passive thermoelectric generator with phase change heat exchangers and radiative coolingen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
relation.isAuthorOfPublication5f626878-b8c6-4403-97ee-e14738ea30e2
relation.isAuthorOfPublicationb191fa17-dc29-406f-891a-6fe13ccc325a
relation.isAuthorOfPublicationd19df8b0-c37b-494b-85cb-a28787bd46f9
relation.isAuthorOfPublication0e0cbc73-4797-4175-ad45-2ab1809d67fa
relation.isAuthorOfPublication.latestForDiscovery5f626878-b8c6-4403-97ee-e14738ea30e2

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