Effect of wind on solar distillation

Abstract A study has been made of roof type solar stills under forced convection conditions. Since the roof type solar still has two inclined surfaces and two vertical surfaces, two arrangements of flow — one parallel to the inclined surfaces of the cover and one parallel to the vertical surfaces of the cover — are investigated. A theoretical equation which gives the heat transfer coefficient for both the inclined and vertical surfaces of the cover is derived. The effect of water and ambient air temperatures, wind velocity, and angle of inclination of the cover on the performance of the still is shown by means of tables and graphs.