Heat transfer characteristics of a hybrid thermal energy storage tank with Phase Change Materials (PCMs) during indirect charging using isothermal coil heat exchanger

Charging of modular thermal energy storage tanks containing water with submerged Phase Change Materials (PCMs) using a constant temperature coil heat exchanger was numerically investigated. Under appropriate operating conditions, the energy density of this hybrid system can be significantly increased (two to five times) relative to a system containing water only (sensible energy storage system). However, due to the low thermal conductivity of …