solar distillation; double effect still; mass flow rate
A simple transient analysis of a solar still is presented incorporating the effect of water flowing over the glass cover. An idea of utilizing the evaporated mass of the water flowing over the glass cover has been suggested and investigated. The effects of other system parameters, like addition of dye, basin water mass and basin liner absorptivity, have also been studied. It is observed that the flow of water over the glass cover enhances the still productivity remarkably and also flowing water at a very low rate and collection of condensed vapour is always advisable to obtain comparably much more distillate output.