Abstract
An intensive numerical study is performed inside the shell and tube type heat exchanger to find out the melting performance of a Phase Change Material (PCM). An axis symmetric virtual model of the thermal storage unit is created and various types of numerical schemes are implemented over it, to validate the suggested experimental results. Grid independence test of a shell-and-tube geometry, made by a horizontal cylindrical tank which is fully packed with a PCM and an inner spiral tube, is completed. Initial & boundary conditions were applied on the modeled geometry of the cylinder in which the Heat Transfer Fluid (HTF) flows from the inlet to outlet. The computational analysis of the optimized size of meshed geometry is performed to know the outcome of increasing HTF temperature during the charging process of the PCM. In this study, virtual tests are performed at a different temperature from 650C to 750C at an interval of 50C, as HTF temperature increases, the charging time of PCM reduce. This reduction in charging time of PCM melting with increment HTF temperature leads towards the improvement in the efficiency of Thermal Energy Storage System (TESS). The computational finding shows the increment in the inlet water temperature at 750C, whereas the total melting time is reduced by 20%.
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