A passive solar still (single-slope solar still) was connected to a flat plate collector, to be an active one, through a heat exchanger on the bottom of the still basin, and a small size pump to circulate the working fluid (distilled water) in a closed and separate loop from the basin water in order to transfer extra thermal energy to the solar still for improving the productivity of the solar still, as well as avoiding corrosive effects on the collector material or forming scales which clog

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... collector due to the natural chemicals of salty, brackish, or contaminated water which is the main problem of direct augmentation .The system was designed, manufactured and tested at