Volume 20 No 22 (2022)
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Pande Ashish Madhukar Rao, Dr. Nitin Yashwant Patil
Solar thermal technologies' commercial viability and economic viability are dependent on the creation of efficient and reasonably priced thermal storage systems. Due to its isothermal behaviour during charging and discharging and huge heat storage capacity, thermal storage units that use latent heat storage materials have gained more attention in recent years. For any application involving latent heat thermal storage (LHTS), heat transfer augmentation techniques are necessary, as the thermal conductivity of most high energy storage density phase-change materials (PCM) is unacceptable. Enhancing heat transfer in a thermal storage device made up of a cylindrical vertical tube with an arrangement of longitudinal fins inside it is studied. Following is a full mathematical and analytical model created using the enthalpy formulation to look into how non-dimensional factors affect the LHTS unit's performance. The current work creates a broad H-T relationship that works for materials that have either constant phase change temperatures or a range of them. Finding solutions to phase change problems using numerical methods is easier because of this link. What makes the computer model special is that it considers the flow of heat around the edge of the container. For a useful range of Biot numbers and other geometrical and physical factors, the need for fins and the need to think about the circumferential heat flow are scrutinised. This article explains how the experimental findings can be used to validate the numerical model. On a practical range of parameters, the temperature distribution along the radial direction in the fin, along the circumferential direction in the boundary wall and within the PCM region, the location of the interface in the PCM region, the surface heat flux, and the frozen volume fraction are all shown and talked about. This paper shows the effect of Biot and Stefan number, fin improvement factor, and subcooled factor when put together.
Enhancement Factor (EF), cylindrical glass jar, thermocouples, transportation
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