Melting Enhancement in a Triple-Tube Latent Heat Storage System with Sloped Fins.
Mustafa Z. Mahmoud,Hayder I. Mohammed,Jasim M. Mahdi,Dmitry Bokov,Nidhal Ben Khedher,Naif Khalaf Alshammari,Pouyan Talebizadehsardari,Wahiba Yaïci +7 more
TLDR
In this article, the effect of different configurations, dimensions, and orientations of the circular fin at different flow conditions of the heat transfer fluid were numerically examined and optimized using an experimentally validated computational fluid-dynamic model.Abstract:
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 mm2 to 0.55 × 25.76 mm2 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.read more
Citations
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Improved Melting of Latent Heat Storage Using Fin Arrays with Non-Uniform Dimensions and Distinct Patterns
Farqad T. Najim,Hayder I. Mohammed,Hussein M. Taqi Al-Najjar,Lakshmi Thangavelu,Mustafa Z. Mahmoud,Jasim M. Mahdi,Mohammadreza Ebrahimnataj Tiji,Wahiba Yaïci,Pouyan Talebizadehsardari +8 more
TL;DR: In this article , the authors investigated the impact of modifying the fin geometric characteristics and distribution patterns in various spatial zones of the heat exchanger, and found that changing the fin dimensions with the heat flow direction results in a faster charging rate, a higher storage rate, and a more uniform temperature distribution when compared to a uniform fin size.
Journal ArticleDOI
Performance investigation of a vertically configured LHTES via the combination of nano-enhanced PCM and fins: experimental and numerical approaches
TL;DR: In this paper , a 3D numerical study is presented to investigate the performance of a vertically-configured cylindrical copper LHTES using nano-enhanced PCM (NEPCM) with both outer and inner longitudinal fins.
Journal ArticleDOI
Emergence of asymmetric straight and branched fins in horizontally oriented latent heat thermal energy storage units
TL;DR: In this article , the effect of fin structures on the melting performance of phase change materials in a shell-and-tube heat exchanger was investigated, and it was found that fin structures in all cases performed better when located at the top of the heat transfer fluid tube, even though the literature considers that top-located fin inhibit natural convection circulations.
Journal ArticleDOI
Heat transfer enhancement technology for fins in phase change energy storage
Xuwu Zhu,Yan Li,QunZhi Zhu +2 more
TL;DR: In this paper , the authors summarized the current development process of new fins in the industry and the optimization results of the size, shape, and arrangement of fin by related researchers and analyzed the strengthening mechanism of heat transfer effect enhancement.
Journal ArticleDOI
Improving the melting performance in a triple-pipe latent heat storage system using hemispherical and quarter-spherical fins with a staggered arrangement
Azher M. Abed,Hayder I. Mohammed,Indrajit Patra,Jasim M. Mahdi,Adeel Arshad,R. Sivaraman,Raed Khalid Ibrahem,Fadhil Abbas Mahdi Al-Qrimli,Sami Dhahbi,Pouyan Talebizadehsardari +9 more
TL;DR: In this paper , a phase change material (PCM) based latent heat storage system with hemispherical and quarter-spherical fin arrays was evaluated. And the results of the system equipped with novel fins were compared with those without fins.
References
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TL;DR: In this article, a detailed parametric investigation is performed for melting in spherical shells of 40, 60, and 80mm in diameter, when the wall-temperature is uniform and varies from 2 ÂC to 20 Â C above the mean melting temperature of the PCM.
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Enhance heat transfer for PCM melting in triplex tube with internal-external fins
Sohif Mat,Abduljalil A. Al-Abidi,Abduljalil A. Al-Abidi,Kamaruzzaman Sopian,M. Y. Sulaiman,Abdulrahman Th Mohammad +5 more
TL;DR: In this paper, the melting process in a triplex-tube heat exchanger with phase-change material (PCM) RT82.26 was numerically investigated using the Fluent 6.3.
Journal ArticleDOI
Internal and external fin heat transfer enhancement technique for latent heat thermal energy storage in triplex tube heat exchangers
Abduljalil A. Al-Abidi,Abduljalil A. Al-Abidi,Sohif Mat,Kamaruzzaman Sopian,M. Y. Sulaiman,Abdulrahman Th Mohammad +5 more
TL;DR: In this article, heat transfer enhancement technique by using internal and external fins for PCM melting in a triplex tube heat exchanger (TTHX) was investigated numerically.
Journal ArticleDOI
Thermal performance of a shell-and-tube latent heat thermal energy storage unit : Role of annular fins
Xiaohu Yang,Xiaohu Yang,Xiaohu Yang,Zhao Lu,Qingsong Bai,Qunli Zhang,Liwen Jin,Jinyue Yan,Jinyue Yan +8 more
TL;DR: In this article, the melting process in a shell-and-tube latent heat thermal energy storage (LHTES) unit with annular fins was investigated and commercial grade paraffin was employed as the p...
Journal ArticleDOI
Geometric and design parameters of fins employed for enhancing thermal energy storage systems: a review
Ammar M. Abdulateef,Ammar M. Abdulateef,Sohif Mat,Jasim Abdulateef,Jasim Abdulateef,Kamaruzzaman Sopian,Abduljalil A. Al-Abidi,Abduljalil A. Al-Abidi +7 more
TL;DR: In this article, a review of heat transfer enhancement techniques between phase change material (PCM) and the heat transfer fluid (HTF) based on the application of fins embedded in the PCM is presented.