126468 20241125101153.0 doi 10.1016/j.renene.2023.03.125 sideral 133844 ART-2023-133844 eng Herrando, María (orcid)0000-0002-0787-8938 Numerical analysis of the fluid flow and heat transfer of a hybrid PV-thermal collector and performance assessment 2023 Access copy available to the general public Unrestricted In recent years, new materials and absorber configurations have been proposed to improve the performance of hybrid photovoltaic-thermal (PV-T) collectors. This work analyses the fluid flow and the energy performance of an uncovered water-based PV-T collector with a roll-bond thermal absorber. A detailed CFD model was developed and the results were compared with the experimental performance features provided by the PV-T manufacturer. The fluid flow results show uneven flow distribution among the roll-bond microchannels which leads to areas with larger PV cell temperatures and thus a lower electricity generation. The PV-T collector layers were also modelled using the energy transfer equations layer-by-layer. The model was run for several water inlet temperatures and water flow-rates to obtain the thermal performance curve. The results show that the electrical efficiency of the PV-T collector is 14.5–10.3% larger than for a PV-only system for water inlet temperatures of 20–30 °C, respectively. The developed CFD model reproduces accurately the thermal performance of the PV-T collector, with a maximum error of 6.5% for inlet water temperatures of 20–60 °C. Therefore, this model can be used with confidence to propose alternative designs that achieve a homogeneous temperature distribution in the PV layer and improve the overall PV-T collector performance. info:eu-repo/grantAgreement/ES/MCIU-FEDER/RTC-2017-6026-3 info:eu-repo/grantAgreement/ES/MCIU/IJC-2020-043717-I info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 9.0 2023 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 16 / 91 = 0.176 2023 Q1 T1 ENERGY & FUELS 24 / 171 = 0.14 2023 Q1 T1 1.923 2023 Renewable Energy, Sustainability and the Environment 2023 Q1 18.4 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fantoni, Guillermo Cubero, Ana Universidad de Zaragoza (orcid)0000-0003-3432-310X Simón-Allué, Raquel (orcid)0000-0003-0978-3489 Guedea, Isabel Fueyo, Norberto Universidad de Zaragoza (orcid)0000-0001-6205-5160 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 209 (2023), 122-132 Renew. energy Renewable Energy 0960-1481 6744405 http://zaguan.unizar.es/record/126468/files/texto_completo.pdf Versión publicada 2517765 http://zaguan.unizar.es/record/126468/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:126468 articulos driver 2024-11-22-12:07:53 ARTICLE