Improved melting of latent heat storage via porous medium and uniform Joule heat generation

Mohammed, Hayder I.; Talebizadehsardari, Pouyan; Mahdi, Jasim M.; Arshad, Adeel; Sciacovelli, Adriano; Giddings, Donald

doi:10.1016/j.est.2020.101747

Cited by 43 publications

(16 citation statements)

References 54 publications

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“…Still, a major concern for the LHTES system is PCM's minimal thermal Energies 2021, 14, 7179 2 of 23 efficiency, which decreases the phase change rate [14][15][16][17]. Researchers developed several techniques to improve the heat transfer rate of such systems, including the expansion of the heat transfer surface area [18][19][20], adding micro or nano-sized particles [21][22][23][24], using cascade layer PCM [25], encapsulation techniques [26,27], changing the location of the heat transfer fluid (HTF) channel [28][29][30], fins combinations [31][32][33], conductive foams [34][35][36], and using magnetic fields [37,38].…”

Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

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This work evaluates the influence of combining twisted fins in a triple-tube heat exchanger utilised for latent heat thermal energy storage (LHTES) in three-dimensional numerical simulation and comparing the outcome with the cases of the straight fins and no fins. The phase change material (PCM) is in the annulus between the inner and the outer tube, these tubes include a cold fluid that flows in the counter current path, to solidify the PCM and release the heat storage energy. The performance of the unit was assessed based on the liquid fraction and temperature profiles as well as solidification and the energy storage rate. This study aims to find suitable and efficient fins number and the optimum values of the Re and the inlet temperature of the heat transfer fluid. The outcomes stated the benefits of using twisted fins related to those cases of straight fins and the no-fins. The impact of multi-twisted fins was also considered to detect their influences on the solidification process. The outcomes reveal that the operation of four twisted fins decreased the solidification time by 12.7% and 22.9% compared with four straight fins and the no-fins cases, respectively. Four twisted fins improved the discharging rate by 12.4% and 22.8% compared with the cases of four straight fins and no-fins, respectively. Besides, by reducing the fins’ number from six to four and two, the solidification time reduces by 11.9% and 25.6%, respectively. The current work shows the impacts of innovative designs of fins in the LHTES to produce novel inventions for commercialisation, besides saving the power grid.

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Section: Introductionmentioning

confidence: 99%

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

et al. 2021

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“…The key drawback that requires substantial consideration is the low rate of thermal transition during phase transition, owing to the comparatively weak thermal properties of the most present-day PCMs. Some feasible suggestions for resolving the issue involve the proper design of containment system able to deliver a proper thermal transport from the heat transfer fluid (HTF) to the store material, and the application of relevant heat-transfer enhancers such as metal nanoparticles [1][2][3][4][5][6], fin arrays [7][8][9][10], and porous foams [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Intensifying the Charging Response of a Phase-Change Material with Twisted Fin Arrays in a Shell-And-Tube Storage System

et al. 2021

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A twisted-fin array as an innovative structure for intensifying the charging response of a phase-change material (PCM) within a shell-and-tube storage system is introduced in this work. A three-dimensional model describing the thermal management with charging phase change process in PCM was developed and numerically analyzed by the enthalpy-porosity method using commercial CFD software. Efficacy of the proposed structure of fins for performing better heat communication between the active heating surface and the adjacent layers of PCM was verified via comparing with conventional longitudinal fins within the same design limitations of fin material and volume usage. Optimization of the fin geometric parameters including the pitch, number, thickness, and the height of the twisted fins for superior performance of the proposed fin structure, was also introduced via the Taguchi method. The results show that a faster charging rate, higher storage rate, and better uniformity in temperature distribution could be achieved in the PCMs with Twisted fins. Based on the design of twisted fins, it was found that the energy charging time could be reduced by up to 42%, and the energy storage rate could be enhanced up to 63% compared to the reference case of straight longitudinal fins within the same PCM mass limitations.

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“…6 Different methods have been developed to improve PCM characteristics, including fins deployment, 7,8 incorporating design features in air conditioning ducts, 9 heat pipes, 10 multi-tube usages in shell and tube heat exchangers, 11 encapsulated PCMs in microencapsulation 12 in larger-scale capsules, 13 molten salt capsules, 14 direct contact heat transfer enhancement by convective transport. 15 Some other improvement methods are enlarging the temperature variation between the heating source and the PCMs, 16 localized heat generation inside the PCM, 17 using nanomaterials in the PCM, 18 and deployment of the extended surface heat transfer by inserting fibrous materials such as carbon fiber brushes and carbon nanofibre, 19,20 use of expanded graphite foam, 21,22 and the use of metal foams. 23,24 The high thermal conductive porous medium approach significantly improves PCM-based heat exchangers' thermal performance as the porous medium has great thermal conductivity, high porosity, and high thermal surface area with negligible effect on the storage capacity 25 using metal or graphite foams.…”

Section: Introductionmentioning

confidence: 99%

Localized heating element distribution in composite metal foam‐phase change material: Fourier's law and creeping flow effects

et al. 2021

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Improved melting of latent heat storage via porous medium and uniform Joule heat generation

Cited by 43 publications

References 54 publications

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Solidification Enhancement in a Triple-Tube Latent Heat Energy Storage System Using Twisted Fins

Intensifying the Charging Response of a Phase-Change Material with Twisted Fin Arrays in a Shell-And-Tube Storage System

Localized heating element distribution in composite metal foam‐phase change material: Fourier's law and creeping flow effects

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