This communication presents the thermal analysis of passive and active solar distillation system by using the concept of
solar fraction inside the solar still with the help of AUTOCAD 2000 for given solar azimuth and altitude angle and latitude, longitude of the place. Experiments have been conducted for 24 h (9 am to 8 am) for New Delhi climatic conditions
(latitude 2835
0
N, longitude 7712
0
E) during the months of November and December for different water depths in the
basin (0.05, 0.1 and 0.15 m) for passive as well as active solar distillation system. Analytical expressions for water and glass
cover temperatures and yield have been derived in terms of design and climatic parameters. It is observed that