Economically feasible and eco-friendly water treating technologies are most expected in Asia and Africa which lead to an increase in usage of renewable energy. Hence, solar stills are the best choice to resolve the issue related to water scarcity. Due to the low productivity of solar stills, continuous research is being performed considering different parameter changes to optimize its production. Research had been carried out by altering and optimizing the condensing surface of solar still for performance improvement. In this research, the modification of condensing surface is done by multiple hemispherical slopes. The flow pattern has been analysed inside the solar still before and after modification and the changes in performance have been compared with single slope solar still and presented for better understanding.
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