Experimental analysis of the heat transfer rate of phase change material inside a horizontal cylindrical latent heat energy storage system

Kothari, Ravi; Ahmad, Asim; Chaurasia, Shailesh Kumar; Prakash, Om

doi:10.1016/j.mset.2022.02.004

Cited by 4 publications

(6 citation statements)

References 31 publications

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“…The integration of thermal energy storage (TES) systems is very important in addressing the energy crisis by storing solar energy in the form of heat and releasing it when required [1]. One technology to be used in TES systems is latent heat thermal energy storage, which stores energy as latent heat using phase change materials [2,3]. Additionally, in comparison to other TES technologies (sensible heat and thermo-chemical energy storage) in use, it offers a high energy storage density.…”

Section: Introductionmentioning

confidence: 99%

Development of a Bio-Inspired TES Tank for Heat Transfer Enhancement in Latent Heat Thermal Energy Storage Systems

Cabeza,

Mani Kala,

Zsembinszki

et al. 2024

Applied Sciences

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Thermal energy storage (TES) systems play a very important part in addressing the energy crisis. Therefore, numerous researchers are striving to improve the efficiency of TES tanks. The TES technology has the potential to reach new heights when the biological behavior of nature is incorporated into the design of TES tanks. By mimicking the branched vein pattern observed in plants and animals, the heat transfer fluid (HTF) tube of a TES tank can enhance the heat transfer surface area, hence improving its thermal efficiency without the need to add other enhancements of heat transfer methods. Accordingly, in this study, a unique additive-manufacturing-based bio-inspired TES tank was designed, developed, and tested. A customized testing setup was used to assess the bio-inspired TES tank’s thermal performance. A comparison was made between the bio-inspired TES tank and a conventional shell-and-tube TES tank. The latent TES system’s thermal performance was significantly enhanced by the biomimetic approach for the design of a TES tank, even before the optimization of its design. The results showed that, compared to the shell-and-tube TES tank, the bio-inspired TES tank had a higher discharging rate and needed 52% less time to release the stored heat.

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Section: Introductionmentioning

confidence: 99%

Development of a Bio-Inspired TES Tank for Heat Transfer Enhancement in Latent Heat Thermal Energy Storage Systems

Cabeza,

Mani Kala,

Zsembinszki

et al. 2024

Applied Sciences

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“…TES is a well-established technology that has been included in energy systems to cope with the instant rise in energy demand and decrease energy costs through effective and sustainable integration. TES improves energy management in various thermal sectors 1) . The following articles described energy management strategies related to several sectors [2][3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

“…The HTF input temperature considerably affects the total melting time, but the HTF flow rates have little influence. Similarly, Kothari et al 1) analysed the heat transfer rate of Paraffin wax inside an annulus of the LHS unit. A copper pipe with longitudinal fins passes along the cylindrical LHS unit length to observe the thermal performance of Paraffin wax.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Stearic Acid in the Thermal Battery Comprising a Fin and Tube Heat Exchanger

Saini¹,

Chandrashekara²

2023

Evergreen

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Phase change materials (PCM) are employed in thermal energy storage (TES) systems for various applications due to their high energy density. This paper uses a fin and tube heat exchanger made of aluminium and copper in the thermal battery to enhance the heat transfer rate. The HYTHERM 600 is used as the heat transfer fluid (HTF), and stearic acid as the PCM. The experiment analyses the thermal behaviour of stearic acid in the thermal battery. The HTF maintains around 80°C and 85°C in the Hot HTF tank. Results show that conduction is dominant during the early melting stages; however, natural convection supersedes conduction after the stearic acid has liquefied. Conduction serves as the main mechanism of heat transfer during the discharging. The HTF temperature considerably enhances the stearic acid melting rate. The energy storage while charging and discharging is 248.03 kJ/kg and 211.81 kJ/kg, 254.50 kJ/kg, and 218.35 kJ/kg at 80 o C and 85 o C hot HTF temperatures. As the HTF temperature increases from 80 o C to 85 o C, the charging efficiency and higher temperature increase by 8.03% and 6.76%, and the melting time drops by 18.19% during the melting process, but in the discharging of stearic acid, discharging efficiency and lower temperature increases by 6.92% and 7.06%, and discharging time decreases by 25%.

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“…Wu et al 33 assessed the factors affecting the thermal stratification of the PCM tank. A novel PCM in‐water nano‐emulsion for cold storage was adopted by Liang et al 34 Rohit et al 35 conducted an experimental study and found that heat conduction is dominant in PCM tank at the initial charging stage, and convection is dominant after liquefaction. Rok Koželj et al 36 presented an experimental comparison between sensible and latent heat storage devices, which showed that adding 15% PCMs to the water tank can increase the heat storage capacity by 70%.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on thermal performance and inlet and outlet structure optimization of phase change heat storage tank

Zhang

et al. 2022

Intl J of Energy Research

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Summary For the sake of enhancing the heat storage tank performance, the thermal characteristics and structural improvement of a water tank equipped with phase change material (PCM) were explored in this paper. The influence of PCM on the performance of the tank under conditions was experimentally analyzed, and the optimal working condition is determined by comparing the difference in effective heat storage rate under different inlet flow rates and the temperature of the water. The concept of “heat transfer blind zone” is introduced and analyzed, and the temperature and velocity field in PCM tanks with different structures are numerically compared. The results show that the addition of PCM makes the discharging time and effective water supply increase by 12.0% and the charging time increase by 6.0%. As the inlet flow rate and temperature of water rise, the thermal storage capacity reduces, and the effective heat storage rate rises first and then drops. The PCM tank has the optimum performance at the inlet water temperature of 70°C and the inlet flow rate of 15 L/h. The inlet and outlet setting up and down has the best effect on eliminating the “heat transfer blind zone” in the water tank. The research results have a good reference value for the design and realistic operation of the phase change heat storage tank.

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Experimental analysis of the heat transfer rate of phase change material inside a horizontal cylindrical latent heat energy storage system

Cited by 4 publications

References 31 publications

Development of a Bio-Inspired TES Tank for Heat Transfer Enhancement in Latent Heat Thermal Energy Storage Systems

Development of a Bio-Inspired TES Tank for Heat Transfer Enhancement in Latent Heat Thermal Energy Storage Systems

Experimental Investigation of Stearic Acid in the Thermal Battery Comprising a Fin and Tube Heat Exchanger

Experimental and numerical study on thermal performance and inlet and outlet structure optimization of phase change heat storage tank

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