Heat transfer enhancement in latent heat thermal energy storage unit using a combination of fins and rotational mechanisms

Soltani, Hossein; Soltani, Majid; Karimi, Hossein; Nathwani, Jatin

doi:10.1016/j.ijheatmasstransfer.2021.121667

Cited by 76 publications

(6 citation statements)

References 23 publications

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“…Soltani et al [29] numerically studied both the charging and discharging processes in a horizontal shell-and-tube LHTES system with n-eicosane PCM. Four cases of copper radial fins were employed with 0, 4, 8, and 16 fins at rotational speeds of 0.1, 0.5, and 1 rpm.…”

Section: System Rotationmentioning

confidence: 99%

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Shank

Tiari

2023

Energies

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Renewable energy resources require energy storage techniques to curb problems with intermittency. One potential solution is the use of phase change materials (PCMs) in latent heat thermal energy storage (LHTES) systems. Despite the high energy storage density of PCMs, their thermal response rate is restricted by low thermal conductivity. The topic of heat transfer enhancement techniques for increasing thermal performance of LHTES systems has mainly focused on passive heat transfer enhancement techniques with less attention towards active methods. Active heat transfer enhancement techniques require external power supplied to the system. In this paper, recent advances in active heat transfer enhancement techniques within LHTES systems are reviewed, including mechanical aids, vibration, jet impingement, injection, and external fields. The pertinent findings related to the field are summarized in relation to the charging and discharging processes of PCMs. Suggestions for future research are proposed, and the importance of additional energy input for storage is discussed.

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Section: System Rotationmentioning

confidence: 99%

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Shank

Tiari

2023

Energies

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“…As shown in Fig. 1(c),considering the symmetry of the physical model, half of the study model was established as the computational domain [33]，The radius of the inner tube (r1) is 11.5 mm and the radius of the outer shell (r2) is 25 mm [34]. The thickness of the inner tube is 1mm.The length of the fins is 10mm thickness is 1mm.The material of the inner tube and fins is copper and paraffin is taken as PCM , the thermophysical properties of PCM are shown in Table 1 [35].…”

Section: Description Of Simulation Model 21 Models and Boundary Condi...mentioning

confidence: 99%

“…Since the physical properties of the paraffin liquid and solid phases vary, the specific heat capacity and thermal conductivity of paraffin are set in segments for the accuracy of the calculation results [36], in the FLUENT material property parameter setting, select the "piecewise-linear" option for Cp and λ to complete the segmented setting. The physical property parameters in the pure liquid phase and pure solid phase regions are constants, respectively, which are linearized in the two-phase paste region and calculated as follows [33]:…”

Section: Description Of Simulation Model 21 Models and Boundary Condi...mentioning

confidence: 99%

Numerical simulation study of the effect of mechanical vibration on heat transfer in a six-fin latent heat thermal energy storage unit

Luo

Chen

et al. 2023

International Journal of Heat and Mass Transfer

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“…Beyond fin shape, fin spacing and height were also found to impact the natural convection of melted PCM. Soltani et al 28 conducted a numerical investigation into the combined effects of fins and rotation on the melting and solidification processes of a latent heat thermal energy storage HE. Radial fins were employed in a shell‐and‐tube PCM HE.…”

Section: Introductionmentioning

confidence: 99%

The optimum fin length distribution of tabular PCM heat exchanger

Saleh,

Mussa

2024

Heat Trans

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The study aims to find the optimal fin length distribution for improved heat transfer during melting and solidification in a tubular phase change material (PCM) heat exchanger (HE) designed for heat storage. Three types of horizontal PCM tabular HEs, all with five longitudinal fins, were studied numerically. While maintaining a constant heat‐transfer area, each model depicts a unique fin length distribution design. The first model, which serves as the reference design, has a uniform fin length distribution and each fi\n is 30 mm long. The second model has shorter upper and side fins and longer lower fins. The third model has long lower fins but shorter than that of the second model, with short side fins and no change in upper fin length with reference design. The findings indicate that the second model exhibits the best heat‐transfer performance for the melting process, while the first model is most effective for solidification. Interestingly, the third design emerges as the optimum choice for both melting and solidification processes, where for 1 h of melting operation, results obtained 87%, 92%, and 90% for three models, respectively, from the first uniform model to the third model. While for 2 h of solidification the result obtained 11%, 17%, and 13% liquid fraction for the three models, respectively.

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Heat transfer enhancement in latent heat thermal energy storage unit using a combination of fins and rotational mechanisms

Cited by 76 publications

References 23 publications

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

A Review on Active Heat Transfer Enhancement Techniques within Latent Heat Thermal Energy Storage Systems

Numerical simulation study of the effect of mechanical vibration on heat transfer in a six-fin latent heat thermal energy storage unit

The optimum fin length distribution of tabular PCM heat exchanger

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