Experimental and theoretical impact of the coco peat powder on the performance of conventional solar still (CSS) compared to MSS has been reported. Dunkle model was used in this experiment as the mathematical model. With the help of this model variation of partial pressure, internal heat transfer coefficients, yield, internal efficiency, and exergy efficiency has been evaluated. The average partial pressure for MSS is 94.19% higher than CSS in the experiment of 13 h. Use of coco peat powder the value of h?? and h?? were 9.63% and 2.53% respectively were recorded higher than the CSS. There was a rise of 30.89% of distillate output from the MSS when compared to CSS. It seems that the use of coco peat powder has enhanced the exergy efficiency by 28.14% of MSS when compared with CSS.

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