Experimental and numerical investigations of thermal performance enhancement in a latent heat storage heat exchanger using bifurcated and straight fins

Safari, Vahid; Abolghasemi, Hossein; Kamkari, Babak

doi:10.1016/j.renene.2021.04.076

Cited by 95 publications

(5 citation statements)

References 44 publications

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“…In this method, the computational domain is considered as a porous region. The porosity value is associated with the generated liquid PCM in each cell volume, and it ranges from zero (solid PCM) to one (liquid PCM) [45,46]. The density of the fluid (liquid PCM) is considered to be constant in all terms except for the buoyancy term where the Boussinesq approximation is employed.…”

Section: Mathematical Formulationmentioning

confidence: 99%

Sensitivity analysis of design parameters for melting process of lauric acid in the vertically and horizontally oriented rectangular thermal storage units

Safari

Kamkari²,

Hooman³

et al. 2022

Energy

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Section: Mathematical Formulationmentioning

confidence: 99%

Sensitivity analysis of design parameters for melting process of lauric acid in the vertically and horizontally oriented rectangular thermal storage units

Safari

Kamkari²,

Hooman³

et al. 2022

Energy

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“…The majority of extant research concentrates on passive techniques for increasing melting efficiency, which include modifying the TES unit geometry [6,7], employing multiple PCMs [8,9], microencapsulation of PCM [10], optimising operating conditions [11,12] and adding high conductivity enhancers into the PCM to directly increase the effective thermal conductivity [13]. These enhancers include fins [14][15][16], nanoparticles [17][18][19], metal foam [20][21][22], heat pipe [23,24] and the combination of them [25,26]. However, these passive techniques suffer from the reduction of PCM volume, the increase in the TES unit weight and specialised construction requirements.…”

Section: Introductionmentioning

confidence: 99%

Melting and Solidification Characteristics of PCM in Oscillated Bundled-Tube Thermal Energy Storage System

Liu,

Xiao,

Chen

et al. 2024

Energies

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Phase change material (PCM) based thermal energy storage (TES) is an important solution to the waste of heat and intermittency of new energy sources. However, the thermal conductivity of most PCMs is low, which severely affects the thermal energy storage performance. Oscillation of the tube bundles in a TES unit can intensify the convection of liquid PCM and, therefore, enhance heat transfer. However, the energy storage performance of bundled-tube TES systems in response to oscillation at different amplitudes and frequencies has not been well understood yet, and the optimum time to apply the oscillation during phase transition remains unexplored. To address this issue, this present study was carried out. First, the melting behaviour of PCM with oscillation starting at different times was investigated. Then, the influences of oscillation frequency and amplitude on the melting performance were explored. Finally, the solidification behaviour of PCM with oscillation starting at different times was examined. Results show that the oscillation can accelerate the phase transition process by enhancing convective heat transfer. Compared to the case without oscillation, the complete melting and solidification times are reduced by 8.2 and 6.7% for the case with oscillation starting at 200 s, respectively. The effect of oscillation frequency on the melting enhancement is negligible, while the oscillation amplitude has an important effect on the melting enhancement.

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“…Different shapes of fins configuration and applications are studied by different researchers also. [12][13][14][15] Safari et al 16 studied the performance of latent heat storage heat exchangers with bifurcated as well as straight fins and found that the bifurcated fins perform better than the straight fins. Further, the optimum fin configuration depends on the fin length and the location at the annulus.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of melting behaviour of PCM in a square enclosure having rectangular fin and T-shaped fin, placed in vertical and horizontal direction: A numerical approach

Bhattacharjee

Nath

Bhanja

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Latent heat thermal energy storage applications are increasing in modern days for various purposes, such as solar thermal applications, air conditioning, textile industries, pharmaceutical industries, etc. In the present work melting of Laurie acid (PCM) in a square enclosure with rectangular as well as T-shaped fin in the vertical and horizontal direction is studied numerically. It is observed that among T-shaped fins and rectangular fins, a vertical T-shaped fin has the least melting time. A vertical T-shaped fin reduces the melting time by up to 70.3% in comparison with a no-fin case in the bottom wall. But up to 80% melting process, a horizontal rectangular fin placed at a lower height gives the highest melting rate. Vertical fins always perform better than horizontal fins, for having a symmetrical convection current on both sides of the fin. Further horizontal T-shaped fin placed in the middle of the vertical wall performs better than the horizontal rectangular fin placed in the same position. But, the rectangular fin placed below the centre of the vertical wall performs melting much faster than the horizontal T-shaped fin, because of intensified convection current. Rectangular fin placed below the centre of the vertical wall reduces the melting time by 57.2% in comparison with no fin casein the side wall.

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Experimental and numerical investigations of thermal performance enhancement in a latent heat storage heat exchanger using bifurcated and straight fins

Cited by 95 publications

References 44 publications

Sensitivity analysis of design parameters for melting process of lauric acid in the vertically and horizontally oriented rectangular thermal storage units

Sensitivity analysis of design parameters for melting process of lauric acid in the vertically and horizontally oriented rectangular thermal storage units

Melting and Solidification Characteristics of PCM in Oscillated Bundled-Tube Thermal Energy Storage System

A comparative study of melting behaviour of PCM in a square enclosure having rectangular fin and T-shaped fin, placed in vertical and horizontal direction: A numerical approach

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