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Simple solar water desalination system


The experimental new solar distiller incorporates a rectangular basin, inside of which is a horizontally oriented black steel cylinder. The basin is filled with undrinkable water, and the cylinder is slowly rotated by a solar-powered DC motor. The rotating hollow cylinder inside the solar distiller accelerates water evaporation in the vessel by forming a thin film of water on the outer and inner surface of the cylinder, which is constantly renewed with each turn. As the film is so thin, the water film quickly evaporates due to the rapid transfer of heat from the surface of the cylinder to the adjacent water film. To increase the temperature of water under the cylinder, the engineers used a solar collector.
“The performance improvement factor of the created solar distiller, compared to traditional devices, was at least 280% in the relatively hot months (June, July, and August) and at least 300% and 400% in the cooler months (September and October), at the same time, the cumulative water distillation capacity reached 12.5 l/m2 per day in summer and 3.5 l/m2 per day in winter,”

CSS- commercial solar still, - MSS-modified solar still



Source:
https://www.sciencedirect.com/science/article/pii/S2214157X21003798#fig1

 

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