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Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins

Due to the potential cost saving and minimal temperature stratification, the energy storage based on phase-change materials (PCMs) can be a reliable approach for decoupling energy demand from immediate supply availability. However, due to their high heat resistance, these materials necessitate the i...

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Autores principales: Mahmoud, Mustafa Z., Mohammed, Hayder I., Mahdi, Jasim M., Bokov, Dmitry Olegovich, Ben Khedher, Nidhal, Alshammari, Naif Khalaf, Talebizadehsardari, Pouyan, Yaïci, Wahiba
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623326/
https://www.ncbi.nlm.nih.gov/pubmed/34835917
http://dx.doi.org/10.3390/nano11113153
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author Mahmoud, Mustafa Z.
Mohammed, Hayder I.
Mahdi, Jasim M.
Bokov, Dmitry Olegovich
Ben Khedher, Nidhal
Alshammari, Naif Khalaf
Talebizadehsardari, Pouyan
Yaïci, Wahiba
author_facet Mahmoud, Mustafa Z.
Mohammed, Hayder I.
Mahdi, Jasim M.
Bokov, Dmitry Olegovich
Ben Khedher, Nidhal
Alshammari, Naif Khalaf
Talebizadehsardari, Pouyan
Yaïci, Wahiba
author_sort Mahmoud, Mustafa Z.
collection PubMed
description Due to the potential cost saving and minimal temperature stratification, the energy storage based on phase-change materials (PCMs) can be a reliable approach for decoupling energy demand from immediate supply availability. However, due to their high heat resistance, these materials necessitate the introduction of enhancing additives, such as expanded surfaces and fins, to enable their deployment in more widespread thermal and energy storage applications. This study reports on how circular fins with staggered distribution and variable orientations can be employed for addressing the low thermal response rates in a PCM (Paraffin RT-35) triple-tube heat exchanger consisting of two heat-transfer fluids flow in opposites directions through the inner and the outer tubes. Various configurations, dimensions, and orientations of the circular fins at different flow conditions of the heat-transfer fluid were numerically examined and optimized using an experimentally validated computational fluid-dynamic model. The results show that the melting rate, compared with the base case of finless, can be improved by 88% and the heat charging rate by 34%, when the fin orientation is downward–upward along the left side and the right side of the PCM shell. The results also show that there is a benefit if longer fins with smaller thicknesses are adopted in the vertical direction of the storage unit. This benefit helps natural convection to play a greater role, resulting in higher melting rates. Changing the fins’ dimensions from (thickness × length) 2 × 7.071 mm(2) to 0.55 × 25.76 mm(2) decreases the melting time by 22% and increases the heat charging rate by 9.6%. This study has also confirmed the importance of selecting the suitable values of Reynolds numbers and the inlet temperatures of the heat-transfer fluid for optimizing the melting enhancement potential of circular fins with downward–upward fin orientations.
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spelling pubmed-86233262021-11-27 Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins Mahmoud, Mustafa Z. Mohammed, Hayder I. Mahdi, Jasim M. Bokov, Dmitry Olegovich Ben Khedher, Nidhal Alshammari, Naif Khalaf Talebizadehsardari, Pouyan Yaïci, Wahiba Nanomaterials (Basel) Article Due to the potential cost saving and minimal temperature stratification, the energy storage based on phase-change materials (PCMs) can be a reliable approach for decoupling energy demand from immediate supply availability. However, due to their high heat resistance, these materials necessitate the introduction of enhancing additives, such as expanded surfaces and fins, to enable their deployment in more widespread thermal and energy storage applications. This study reports on how circular fins with staggered distribution and variable orientations can be employed for addressing the low thermal response rates in a PCM (Paraffin RT-35) triple-tube heat exchanger consisting of two heat-transfer fluids flow in opposites directions through the inner and the outer tubes. Various configurations, dimensions, and orientations of the circular fins at different flow conditions of the heat-transfer fluid were numerically examined and optimized using an experimentally validated computational fluid-dynamic model. The results show that the melting rate, compared with the base case of finless, can be improved by 88% and the heat charging rate by 34%, when the fin orientation is downward–upward along the left side and the right side of the PCM shell. The results also show that there is a benefit if longer fins with smaller thicknesses are adopted in the vertical direction of the storage unit. This benefit helps natural convection to play a greater role, resulting in higher melting rates. Changing the fins’ dimensions from (thickness × length) 2 × 7.071 mm(2) to 0.55 × 25.76 mm(2) decreases the melting time by 22% and increases the heat charging rate by 9.6%. This study has also confirmed the importance of selecting the suitable values of Reynolds numbers and the inlet temperatures of the heat-transfer fluid for optimizing the melting enhancement potential of circular fins with downward–upward fin orientations. MDPI 2021-11-22 /pmc/articles/PMC8623326/ /pubmed/34835917 http://dx.doi.org/10.3390/nano11113153 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mahmoud, Mustafa Z.
Mohammed, Hayder I.
Mahdi, Jasim M.
Bokov, Dmitry Olegovich
Ben Khedher, Nidhal
Alshammari, Naif Khalaf
Talebizadehsardari, Pouyan
Yaïci, Wahiba
Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title_full Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title_fullStr Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title_full_unstemmed Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title_short Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
title_sort melting enhancement in a triple-tube latent heat storage system with sloped fins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623326/
https://www.ncbi.nlm.nih.gov/pubmed/34835917
http://dx.doi.org/10.3390/nano11113153
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