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Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector

In the current investigation, the thermal and thermodynamic behavior of a buoyancy-driven evacuated tube solar collector (ETSC) has undergone precise evaluation, and the efficacy of nanoparticle dispersion in the testing fluid was scrutinized. The natural convection process was analyzed in different...

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Autores principales: Tabarhoseini, S. Mojtaba, Sheikholeslami, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8792030/
https://www.ncbi.nlm.nih.gov/pubmed/35082336
http://dx.doi.org/10.1038/s41598-022-05263-2
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author Tabarhoseini, S. Mojtaba
Sheikholeslami, M.
author_facet Tabarhoseini, S. Mojtaba
Sheikholeslami, M.
author_sort Tabarhoseini, S. Mojtaba
collection PubMed
description In the current investigation, the thermal and thermodynamic behavior of a buoyancy-driven evacuated tube solar collector (ETSC) has undergone precise evaluation, and the efficacy of nanoparticle dispersion in the testing fluid was scrutinized. The natural convection process was analyzed in different vertical sections of the absorber tube. The outputs for water and the utilized nanofluid were compared at various cutting planes along the tube during the simulation time. In this problem, CuO nanoparticles with optimum thermal properties were distributed in the base fluid. According to the surveyed results, the temperature distribution analysis illustrates that the mean wall temperature experiences more enhancement when the nanofluid is used. The comparison of the heat transfer coefficient between the two simulated cases show the competency of utilizing CuO-[Formula: see text] nanofluid and highlight its crucial character in improving the thermal treatment of the operate fluid through the collector pipe. Based on irreversibility assessment, the irreversibility due to fluid friction rises when the nanofluid is applied during the flow time. In contrast, the entropy generation of pure water owing to heat transfer surpasses the case with nanofluid. More specifically, the heat transfer entropy generation experience a reduction of about 6.3% (0.143–0.134 W/K) by utilization of CuO with a volume fraction of 5% after 1 h of flow time, whereas the entropy generation by fluid viscosity enhances up to 23% when the nanofluid is applied in the system. The irreversibility originated from heating and fluid viscosity has significant difference in value, owing to the fluid’s low-velocity range in the natural convection process.
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spelling pubmed-87920302022-01-28 Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector Tabarhoseini, S. Mojtaba Sheikholeslami, M. Sci Rep Article In the current investigation, the thermal and thermodynamic behavior of a buoyancy-driven evacuated tube solar collector (ETSC) has undergone precise evaluation, and the efficacy of nanoparticle dispersion in the testing fluid was scrutinized. The natural convection process was analyzed in different vertical sections of the absorber tube. The outputs for water and the utilized nanofluid were compared at various cutting planes along the tube during the simulation time. In this problem, CuO nanoparticles with optimum thermal properties were distributed in the base fluid. According to the surveyed results, the temperature distribution analysis illustrates that the mean wall temperature experiences more enhancement when the nanofluid is used. The comparison of the heat transfer coefficient between the two simulated cases show the competency of utilizing CuO-[Formula: see text] nanofluid and highlight its crucial character in improving the thermal treatment of the operate fluid through the collector pipe. Based on irreversibility assessment, the irreversibility due to fluid friction rises when the nanofluid is applied during the flow time. In contrast, the entropy generation of pure water owing to heat transfer surpasses the case with nanofluid. More specifically, the heat transfer entropy generation experience a reduction of about 6.3% (0.143–0.134 W/K) by utilization of CuO with a volume fraction of 5% after 1 h of flow time, whereas the entropy generation by fluid viscosity enhances up to 23% when the nanofluid is applied in the system. The irreversibility originated from heating and fluid viscosity has significant difference in value, owing to the fluid’s low-velocity range in the natural convection process. Nature Publishing Group UK 2022-01-26 /pmc/articles/PMC8792030/ /pubmed/35082336 http://dx.doi.org/10.1038/s41598-022-05263-2 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Tabarhoseini, S. Mojtaba
Sheikholeslami, M.
Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title_full Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title_fullStr Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title_full_unstemmed Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title_short Entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
title_sort entropy generation and thermal analysis of nanofluid flow inside the evacuated tube solar collector
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8792030/
https://www.ncbi.nlm.nih.gov/pubmed/35082336
http://dx.doi.org/10.1038/s41598-022-05263-2
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