Melting performance enhancement of thermal storage system by utilizing shape and position of double fin

In present study, a 2D rectangular enclosure was considered as latent thermal energy storage (LTES) system. Lauric acid used PCM material. The aim of this study to use fins enhance melting process PCM. Position and shape double were investigating parameters. At first stage three different positions for shape. Results indicated that amongst aforementioned cases, best results achieved when located at lower half enclosure. revealed up 1800s could be saved during whole process. second step, two trapezoidal form one triangular shaped evaluate the effect fin these placed optimum position concluded from previous stage. presented Fo = 0.15, values Nusselt numbers related fins. After case with has least Nu number. performance which 1000s less time observed. Enhancement ratio better after 2500s.