Abstract
Pure water is renewable resource on the earth, it getting impure now a days. Solar desalination is one of the best way to produce fresh water from any type of impure water in a sustainable way. A solar still is a simply design device used to purify the water by using solar energy by the process of evaporation and condensation. Generally, the productivity of the conventional solar still is about 1–5 L/m2/day. But this quantity is not sufficient for an individual to fulfill daily needs of water in life. Hence either more than 1 L/m2 is required per person or better for modifications to improve the solar still design for the demand of the fresh water (likely more than 5 L/m2/day). In this work, an attempt has been made to categorize the different solar still designs with productivity more than 5L/m2/day. Here, we identify as such efficient high productivity of solar stills and discuss their modifications and heat transfer mechanism to reach at useful conclusions. This review will be a reference guide for future researchers who wish to concentrate only on efficient high productivity of solar stills to improve the productivity or efficiency.
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