Effect of Design Parameters on Productivity of Various Passive Solar Stills

Fresh water and shortage of conventional energy are two major problems of the world. Water is the basic necessity for sustenance of all living entities. Human beings are considered most refined living entities. They need clean and fresh water for their sustenance at less consumption of conventional energy or by consumption of renewable energy. In this perspective, many non-renewable and renewable techniques have been developed for the purification of brackish or saline water. Among many water purification techniques, domestic solar still is most attractive and sustainable method to cater the need of fresh drinkable water in distant areas at a reasonable cost. Any amount of effort to improve the yield from solar stills by considering various design parameters is worth to discuss. In the last three decades, so many design parameters are considered to improve the productivity of fresh water. Various designs and design parameters used by researchers to improve the productivity of solar stills were reviewed in this chapter for passive solar stills.