Economic Evaluation of Passive Solar Distillation System

A economic analysis of passive solar distillation unit is presented in the paper. Initial cost and maintenance costs, life of the system and estimates the cost of unit mass of distilled water were used to evaluate net present worth (NPW), benefit-cost ratio, payback period (PP) and internal rate of return (IRR) of solar distillation unit. Net Present Worth (NPW), Benefit-cost ratio, Payback Period (PP) and Internal Rate of Return (IRR) was calculated and found to be Rs. 26945.72, 1.5632, 1.538 year and 50 per cent respectively. This study found solar energy is one of the most attractive resources of energy to generate distilled water.