Comprehensive analysis of melting enhancement by circular Y-shaped fins in a vertical shell-and-tube heat storage system

To overcome the weak thermal conduction of phase change materials (PCM), This investigation aims to study effect circular Y-shaped fins added a two-pipe latent heat-saving unit compared with conventional fins. The system is placed in straight-up orientation, and PCM located annulus, whereas hot water moved inside internal tube charge material (PCM) point 35°C. Different independent geometric factors involving length stem angle tributaries horizontal line number are analysed. impact working fluid’s Reynolds temperature (as input parameters) evaluated as sensitivity analysis control output (melting time rate). results show that increasing height reducing angles higher performance system. For optimal case, fluid from 500 2000 31% reductions melting time. Moreover, raising 45° 55° reduces by ∼44%.