Abstract
This work presents the experimental investigation on a single and double basin solar still equipped with external heater in the lower basin with continuous circulation. The increased temperature of water with the electric heater in the lower basin of solar still increased the temperature of water in the upper basin while continuous evaporation from both the basin occurs. Similarly, the water temperature is increased by 15% by solar radiation in the upper basin. The results of water produced from single basin and double basin were observed as 2.74 and 5.78 kg/m2 day respectively whereas, the yield from double basin solar still with electric heater is found as 6.72 kg/m2 day.
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