“…The copper, aluminium and brass encapsulating materials are used in this study and the experimentation was done by changing different encapsulating material. During off sun shine hours the PTC was bypassed from the circuit, the cooled oil enters the storage tank and gets heated up by transferring heat from the PCM, Discharging process of PCM [8,9]. The inlet and outlet temperature of HTF in the PTC was recorded in order to calculate the thermal gain of the oil through PTC.…”