per the liquified density, 1.9 kg of selected palmitic acid is filled in each tube. Table 1: Description of the several thermocouples locations on the SWH system Table 2: Specification of the experimental setup LPH for clear weather conditions and Run-/I at 20 LPH for cloudy weather conditions. For 2:00 p.m. due to an overcast sky with dense clouds. 4.2 Thermal energy gain variation for a clear and cloudy day during intermittent cloudy conditions. 4.3 Average PCM temperature variation for clear and cloudy days has aextended phase change period than the standard SWH system. Table 3: Various experimental results comparison with the present study study, as shown in Table 3.