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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Mustafa Z. Mahmoud, Hayder I. Mohammed, Jasim M. Mahdi, Dmitry Olegovich Bokov, Nidhal Ben Khedher, Naif Khalaf Alshammari, Pouyan Talebizadehsardari, Wahiba Yaïci
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
Acceso en línea:https://doaj.org/article/6999ad83a0a94bdfa58a6c626facbace
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:6999ad83a0a94bdfa58a6c626facbace
record_format dspace
spelling oai:doaj.org-article:6999ad83a0a94bdfa58a6c626facbace2021-11-25T18:32:51ZMelting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins10.3390/nano111131532079-4991https://doaj.org/article/6999ad83a0a94bdfa58a6c626facbace2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3153https://doaj.org/toc/2079-4991Due 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<sup>2</sup> to 0.55 × 25.76 mm<sup>2</sup> 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.Mustafa Z. MahmoudHayder I. MohammedJasim M. MahdiDmitry Olegovich BokovNidhal Ben KhedherNaif Khalaf AlshammariPouyan TalebizadehsardariWahiba YaïciMDPI AGarticlemeltingheat-transfer enhancementphase-change materialsloped finstriple-pipe heat exchangerChemistryQD1-999ENNanomaterials, Vol 11, Iss 3153, p 3153 (2021)
institution DOAJ
collection DOAJ
language EN
topic melting
heat-transfer enhancement
phase-change material
sloped fins
triple-pipe heat exchanger
Chemistry
QD1-999
spellingShingle melting
heat-transfer enhancement
phase-change material
sloped fins
triple-pipe heat exchanger
Chemistry
QD1-999
Mustafa Z. Mahmoud
Hayder I. Mohammed
Jasim M. Mahdi
Dmitry Olegovich Bokov
Nidhal Ben Khedher
Naif Khalaf Alshammari
Pouyan Talebizadehsardari
Wahiba Yaïci
Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins
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<sup>2</sup> to 0.55 × 25.76 mm<sup>2</sup> 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.
format article
author Mustafa Z. Mahmoud
Hayder I. Mohammed
Jasim M. Mahdi
Dmitry Olegovich Bokov
Nidhal Ben Khedher
Naif Khalaf Alshammari
Pouyan Talebizadehsardari
Wahiba Yaïci
author_facet Mustafa Z. Mahmoud
Hayder I. Mohammed
Jasim M. Mahdi
Dmitry Olegovich Bokov
Nidhal Ben Khedher
Naif Khalaf Alshammari
Pouyan Talebizadehsardari
Wahiba Yaïci
author_sort Mustafa Z. Mahmoud
title 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_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_sort melting enhancement in a triple-tube latent heat storage system with sloped fins
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/6999ad83a0a94bdfa58a6c626facbace
work_keys_str_mv AT mustafazmahmoud meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT hayderimohammed meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT jasimmmahdi meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT dmitryolegovichbokov meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT nidhalbenkhedher meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT naifkhalafalshammari meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT pouyantalebizadehsardari meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
AT wahibayaici meltingenhancementinatripletubelatentheatstoragesystemwithslopedfins
_version_ 1718411021509459968