Enhanced thermal performance of finned latent heat thermal energy storage system: fin parameters optimization

Elmaazouzi, Zakaria; Laasri, Imad Ait; Gounni, Ayoub; Alami, Mustapha El; Bennouna, El Ghali

doi:10.1016/j.est.2021.103116

Cited by 35 publications

(8 citation statements)

References 46 publications

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“…These numbers were chosen so that we could solve the numerical issue with a convergence criterion of 10 −5 in the shortest amount of time possible. The time independence test yields the same findings for various time steps when utilizing an adaptive time‐stepping strategy, as has been demonstrated in earlier work 63 . Figure 6 shows grid‐independent investigations of the model.…”

Section: Numerical Procedures and Validationsupporting

confidence: 77%

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Improvement of melting performance in a longitudinal finned latent heat thermal energy storage unit

et al. 2023

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This article presents an analysis and enhancement of the charging behavior of a double‐pipe LHTES unit with longitudinal fins for concentrated solar power applications using a finite element numerical analysis approach. The finite element approach is applied to this numerical analysis by using “COMSOL Multiphysics” software. The investigated LHTES system has an operating temperature range of 180°C‐300°C and uses “DelcoTerm Solar E 15” as the heat transfer fluid (HTF) with a eutectic inorganic mixture of sodium nitrite and sodium nitrate as the phase change material (PCM). While also taking into account the impact of the tube material and the number of fins, the primary goal of this study is to evaluate performance improvement by changing the thickness and number of fins in a linked manner without changing the storage unit capacity. The results show a maximal impact on thermal performance which decreased the melting time by 46% and the charging time by 49.6% for the configuration with a fin thickness of 1 mm, 27 longitudinal fins, an inner tube made of aluminum, and a mass flow rate of 60 kg/h.

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Section: Numerical Procedures and Validationsupporting

confidence: 77%

“…The time independence test yields the same findings for various time steps when utilizing an adaptive time-stepping strategy, as has been demonstrated in earlier work. 63 Figure 6 shows grid-independent investigations of the model.…”

Section: Grid Independent Investigationsmentioning

confidence: 99%

Improvement of melting performance in a longitudinal finned latent heat thermal energy storage unit

et al. 2023

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“…Based on the aforementioned literary survey, there are few studies concerning with the melting enhancement of PCM in wavy finned tubes latent heat thermal energy storage are presented. One of these studies is that of Elmaazouzi et al 44 where the enhancement of the thermal performance of finned latent heat thermal energy storage system was examining. Therefore, the main objective of this investigation is to examine the impacts of the non-regular outer boundaries together with heated fins attached with a rotating cylinder on the heat transfer rate, melting rate and temperature distributions.…”

Section: Abbreviationsmentioning

confidence: 99%

Melting enhancement of PCM in a finned tube latent heat thermal energy storage

Ahmed

Abderrahmane

Saeed

et al. 2022

Sci Rep

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The current paper discusses the numerical simulation results of the NePCM melting process inside an annulus thermal storage system. The TES system consists of a wavy shell wall and a cylindrical tube equipped with three fins. The enthalpy-porosity method was utilized to address the transient behavior of the melting process, while the Galerkin FE technique was used to solve the system governing equations. The results were displayed for different inner tube positions (right-left–up and down), inner cylinder rotation angle (0 ≤ α ≤ 3π/2), and the nano-additives concentration (0 ≤ ϕ ≤ 0.04). The findings indicated that high values of nano-additives concentration (0.4), bigger values of tube rotation angle (3π/2), and location of the tube at the lower position accelerated the NePCM melting process.

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“…The difference in spatial sampling results in a difference in papers which report the internal energy. In numerical studies reporting internal energy as a function of time is commonly done although most studies report latent stored internal energy (e.g., [71,99,104,130]) or total liquid fraction (e.g., [65, 66, 68, 70, 71, 75, 77, 93, 99, 102, 104, 106, 109, 111, 113, 115, 120-122, 124-128, 130-132, 134, 136]) instead of total stored energy (e.g., [75,111,115,134,137,138]). In experimental studies, the total liquid fraction is sometimes reported (e.g., [67,87,101]) however local temperature measurements are far more commonly reported (e.g., [63,64,69,72,76,83,[87][88][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][105][106][107][108][109][110][111]…”

Section: State Indicatorsmentioning

confidence: 99%

Standardised methods for the determination of key performance indicators for thermal energy storage heat exchangers

Beyne

T’Jollyn

Lecompte

et al. 2023

Renewable and Sustainable Energy Reviews

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Enhanced thermal performance of finned latent heat thermal energy storage system: fin parameters optimization

Cited by 35 publications

References 46 publications

Improvement of melting performance in a longitudinal finned latent heat thermal energy storage unit

Improvement of melting performance in a longitudinal finned latent heat thermal energy storage unit

Melting enhancement of PCM in a finned tube latent heat thermal energy storage

Standardised methods for the determination of key performance indicators for thermal energy storage heat exchangers

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