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Modelling the behaviour of thermal energy harvesting devices with phase-change materials
This paper presents a new general theoretical model of thermal energy harvesting devices (TEHDs), which utilise phase-change materials (PCMs) for energy storage. The model's major goal is to identify a set of parameters under which these devices perform optimally, that is, attain the largest th...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8520016/ https://www.ncbi.nlm.nih.gov/pubmed/34654840 http://dx.doi.org/10.1038/s41598-021-00079-y |
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author | Kulish, Vladimir Hyhlík, Tomáš Sláma, Pavel |
author_facet | Kulish, Vladimir Hyhlík, Tomáš Sláma, Pavel |
author_sort | Kulish, Vladimir |
collection | PubMed |
description | This paper presents a new general theoretical model of thermal energy harvesting devices (TEHDs), which utilise phase-change materials (PCMs) for energy storage. The model's major goal is to identify a set of parameters under which these devices perform optimally, that is, attain the largest thermal buffering capacity and exchange heat with the surrounding phase as quickly as possible. For the first time, an expression for the characteristic harvesting time is developed from the constructal theory viewpoint under the optimal performance assumption, and a dimensionless criterion that characterizes PCM performance is provided. Furthermore, a new non-field solution of the energy equation governing the process of heat transfer within TEHDs with PCMs has also been derived. An expression for the effective thermal effusivity is then obtained. Finally, under a given set of boundary conditions and geometrical constraints, a novel simple technique for the optimal choice of PCMs in TEHDs has been established. |
format | Online Article Text |
id | pubmed-8520016 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-85200162021-10-20 Modelling the behaviour of thermal energy harvesting devices with phase-change materials Kulish, Vladimir Hyhlík, Tomáš Sláma, Pavel Sci Rep Article This paper presents a new general theoretical model of thermal energy harvesting devices (TEHDs), which utilise phase-change materials (PCMs) for energy storage. The model's major goal is to identify a set of parameters under which these devices perform optimally, that is, attain the largest thermal buffering capacity and exchange heat with the surrounding phase as quickly as possible. For the first time, an expression for the characteristic harvesting time is developed from the constructal theory viewpoint under the optimal performance assumption, and a dimensionless criterion that characterizes PCM performance is provided. Furthermore, a new non-field solution of the energy equation governing the process of heat transfer within TEHDs with PCMs has also been derived. An expression for the effective thermal effusivity is then obtained. Finally, under a given set of boundary conditions and geometrical constraints, a novel simple technique for the optimal choice of PCMs in TEHDs has been established. Nature Publishing Group UK 2021-10-15 /pmc/articles/PMC8520016/ /pubmed/34654840 http://dx.doi.org/10.1038/s41598-021-00079-y Text en © The Author(s) 2021 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 Kulish, Vladimir Hyhlík, Tomáš Sláma, Pavel Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title | Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title_full | Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title_fullStr | Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title_full_unstemmed | Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title_short | Modelling the behaviour of thermal energy harvesting devices with phase-change materials |
title_sort | modelling the behaviour of thermal energy harvesting devices with phase-change materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8520016/ https://www.ncbi.nlm.nih.gov/pubmed/34654840 http://dx.doi.org/10.1038/s41598-021-00079-y |
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