| Summary: | Single slope solar still (S4) was the traditional distiller that used solar energy as the primary energy source. The solar energy entering the desalination system is generally large during evaporation. However, productivity tends to lower due to the energy losses that occur during the production period. This research aims to S4 testing with the addition of thermal energy storage (TES) inside the basin. This additional absorber heat could maintain the heat absorption during the production day period. The additional TES is used with the hollow circular fin shaped with the enhanced soybean wax as the phase change material. The study was conducted experimentally from 07.00 to 21.00 GMT +7 by comparing the performance of conventional S4 with additional TEM. The results show that the addition of the TES device influences the S4 performances. Based on the result, the additional TES enhanced the gained performance S4, which was 220 mL and 8.22% higher than conventional S4.
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