In the present study, the analysis of the daily exergy of passive solar still is presented. Basically, there are mainly two approaches for the analysis of exergy of solar stills, namely (i) Carnot efficiency and (ii) entropy concept. The daily exergy analysis has been carried out by using both these approaches. It has been found that the daily exergy output based on entropy concept is more acceptable due to the lower value of total known and unknown exergy destruction in comparison with the Carnot method for a given design and climatic parameters. The instantaneous exergy efficiency is also obtained which is found to be in accordance with the results reported by various other studies.
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G.N. Tiwari (2020) studied this question.
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