Experimental Investigation of Single Slope Solar Still Using Black Granite and Marble Stones as Energy Storage Material (ESM)

Theoretical and experimental research into solar stills that employ black granite stones and Marbles stone as heat storage medium have been conducted in this research. For the aforementioned evaluation, three identical solar stills were built at 1m
²
. Every solar still has its own glass top with both cool and drip systems to keep the water level stable and reduce water loss due to evaporation. Distillate yields from solar stills can be greatly improved by employing black granite stones in both arrangements. One of its aims is to improve everyday distillation outcome. The concordance between theoretically and experimentally results is so confirmed. The solar still's output was doubled by using a black granite stone instead of a marble one, and it was increased by 21% when using both stones instead of just one. The cooling system on the glass top maintained a temperature of around 5°C to 6°C.