Numerical Study of Thermal Conductivity Effect on The Performance of Thermal Energy Storage

In this study, the effect of thermal conductivity phase change material (PCM) on performance energy storage has been analyzed numerically. A horizontal concentric shell-and-tube latent heat system (LHTESS) performed during solidification process. Two types paraffin wax with different melting temperatures and were used as a PCM shell side, case1=0.265W/m.K case2=0.311 W/m.K. Water transfer fluid (HTF) flow through in tube side. Ansys fluent to analyze model by taking into account enthalpy method deal transition. The numerical simulation assumptions three-dimensional, transient, laminar was used. result for PCMs performance, temperature distribution, liquid fraction discharge process compared each other. Furthermore, Nusselt number analyzed. showed that increase reduces time 20%. LHTESS case 2 is 63.2%, whereas case1 54.6%.