The shortage of drinking water around the world is a great problem, facing humanity in present and the future of humans. So we must look for solutions even if they are partial solutions. Solar distillation systems can be considered as a simple solution for this problem. Solar still can produce clean water for laboratory applications, drinking, and for agricultural purposes, depending on the size of the system. These systems have been used for a long time ago; the purpose of the current research is to introduce some improvements for the system to increase the productivity of the distilled water. Three different types of desalination plants have been designed and constructed. First one is a simple conventional solar basin. It can produce about 3L/m2D of fresh water as a maximum capacity on summer. It has a simple shape and the cheaper type of basin solar still. The second one increased the productivity to 7L/m2D. In the third model the bed divide into two side hot and cold side this allow the vapor circulate from the hot sunny part to the cold shadow part of the distillation system, led to an increase of 20% of water productivity. Also, other modification was introduce that is the sun seeker device to maintain sun ray perpendicular to glass cover, this led to an increase in production by 15%. The production of new design was about 9L/m2D of pure water as a maximum capacity on summer.

The shortage of drinking water around the world is a great problem, facing humanity in present and the future of humans. So we must look for solutions even if they are partial solutions. Solar distillation systems can be considered as a simple solution for this problem. Solar still can produce clea...