Solar still; Purification; Distillation processes; Solar energy
In this communication, an analysis of a double effect, active solar distillation unit has been
presented by incorporating the effect of climatic and design parameters. Based on an energy balance in a quasi-steady condition, an analytical expression for hourly yield for each effect has been derived. Numerical computations have been carried out for a typical day in Delhi, and the results have also been compared with single effect, active solar distillation unit. It has been observed that there is a significant improvement in the performance for a minimum flow rate of water in the upper basin.