Thank you ! But i think that an optimization study should be done in the begining .

A.H .Elsheikh @ thank you

Rahma Ben Messai

what do you mean by geometry?? types of solar still or width and length and glass angle

In my point of view, the length and width do not have a significant impact on the freshwater productivity. Furthermore, according to previous studies, the best angle of the glass is the altitude angle in the place. But the different types of solar still such as the conventional, pyramid, duple slope, wick and ..............of course have a significant effect due to different design and operational parameters

Of course sir. Geometry affects the distillate output production

A very important parameter is the distance between the surface of evaporation and condensation. With a decrease, the distillate yield increases dramatically (my observations).

correct Dr. Arsen sit. I have also patented solar still in which I have also claimed same