Experimental analysis of one and two-stage thermoelectric heat pumps to enhance the performance of a thermal energy storage
| dc.contributor.author | Astrain Ulibarrena, David | |
| dc.contributor.author | Aranguren Garacochea, Patricia | |
| dc.contributor.author | Erro Iturralde, Irantzu | |
| dc.contributor.author | Chavarren Oroz, David | |
| dc.contributor.author | Alzuguren Larraza, Iñaki | |
| dc.contributor.department | Ingeniería | es_ES |
| dc.contributor.department | Ingeniaritza | eu |
| dc.contributor.department | Institute of Smart Cities - ISC | en |
| dc.date.accessioned | 2024-02-06T10:23:12Z | |
| dc.date.available | 2024-02-06T10:23:12Z | |
| dc.date.issued | 2023 | |
| dc.date.updated | 2024-02-06T10:23:12Z | |
| dc.description.abstract | This experimental study demonstrates the possibility to enhance the performance of a low-temperature thermal energy storage system (~160 ¿C) based on airflow heating using electrical heaters by including thermoelectric technology. An improvement of the 17 % on COP is reached by using an optimized thermoelectric heat pump system to preheat the airflow, consisting of three one-stage and three pyramidal two-stage thermoelectric heat pumps sequentially installed along the airflow that is heating. This research experimentally analyses and compares the COP of three different configurations of thermoelectric heat pumps: one-stage, square two-stage, and pyramidal two-stage thermoelectric heat pumps. The experimental study aims to characterize the operation of each configuration for heating an airflow of 16.5 m3/h at 25 ¿C as ambient temperature. To that purpose, the airflow inlet temperature, voltage supply, and voltage ratio between stages have been modified. The experimental results show that for 25 ¿C as inlet temperature the one-stage thermoelectric heat pump has the best performance with a maximum generated heat of 78 W. Whereas, a two-stage thermoelectric heat pump is required when the inlet temperature increases. At 40 ¿C as inlet temperature, the square two-stage configuration provides the best performance with a voltage ratio of 2, which reaches a COP of 3.29 generating only 20 W of heat. However, the pyramidal two-stage configuration is able to achieve the maximum heat outputs with a voltage ratio of 1, generating 172; 161; 149 and 138 W, with corresponding COP values of 1.17; 1.16; 1.14 and 1.11 for inlet temperatures of 25; 40; 55 and 70 ¿C. This configuration is the one that achieves the greatest COP values with high inlet temperatures. | en |
| dc.description.sponsorship | The authors would like to acknowledge the support of the grant TED2021-130071A-I00 funded by MCIN/AEI/10.13039/ 501100011033 and by ¿European Union, Spain Next Generation EU/ PRTR¿, as well as the Government of Navarre, Spain as part of the ¿Grants to SINAI agents for the realization of collaborative R&D projects¿ under the PC066-067-068 FlexORCStorage and PC116-117-118 MASS-STORAGE projects. Open access funding provided by Universidad Pública de Navarra. | en |
| dc.format.extent | 12 p. | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Erro, I., Aranguren, P., Alzuguren, I., Chavarren, D., Astrain, D. (2023) Experimental analysis of one and two-stage thermoelectric heat pumps to enhance the performance of a thermal energy storage. Energy, 285(1), 1-12. https://doi.org/10.1016/j.energy.2023.129447. | en |
| dc.identifier.doi | 10.1016/j.energy.2023.129447 | |
| dc.identifier.issn | 0360-5442 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/47350 | |
| dc.language.iso | eng | en |
| dc.publisher | Elsevier | en |
| dc.relation.ispartof | Energy., 285(1), 1-12. | en |
| dc.relation.projectID | info:eu-repo/grantAgreement/MCIN/AEI/501100011033/ES/ | |
| dc.relation.publisherversion | https://doi.org/10.1016/j.energy.2023.129447 | |
| dc.rights | © 2023 The Authors. Published by Elsevier Ltd.This is an open access article under the CCBY-NC-ND License | en |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Two-stage thermoelectric heat pump | en |
| dc.subject | COP | en |
| dc.subject | Air heating | en |
| dc.subject | Thermal energy storage | en |
| dc.title | Experimental analysis of one and two-stage thermoelectric heat pumps to enhance the performance of a thermal energy storage | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
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