Abstract
The performance of the storage unit during the discharging process can be improved with installing extended surfaces and this study aims to show the effect of two arrangements of fins on solidification. The same area of I and V shaped fins indicates that the volume of paraffin will not change with altering the configuration of the system. Unsteady terms were applied via implicit technique and two dimensional domains were simulated via FVM to show the behavior of the system during discharging. The conductivity of utilized paraffin (RT28) has been improved by loading nanoparticles of CuO. Since the fraction of additives is low, it is logical to use homogeneous model formulation to derive the properties of NEPCM. The both cases were compared and outputs showed that the required time for case 1 is 8.93 % lower than that of case 2. With involving I and V shaped fins, the required time of freezing will be 47.26 min and 51.89 min, respectively.
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