Experimental investigation on the performance analysis of blue metal stones and pebble stones as thermal energy storage materials in single slope solar still

Solar stills that use blue metal stones and Pebble stones to store heat are the subject of experimental studies and theoretical studies. Three identical solar stills measure 1 m2 constructs for the analysis mentioned above. To avert water from evaporation and to maintain a consistent water level, each solar still has its glass cover with cooling and dripping mechanisms. Distillate yield from a solar still can be significantly increased by using blue metal stones in a cooling and dripping setup. Its purpose is to increase daily distillate output. It shows that theoretical predictions and experimental findings agree well. The blue metal stone in the solar still produced 1.5 times as much drinkable water as the pebble stone, while the combination of the two stones increased output by 18 % compared to a single still. The temperature was lowered to about 4 °C to 5 °C thanks to the cooling system on the glass cover. © 2022