Effect of glass slope angle and water depth on productivity of double slope solar still

This study presents design, fabrication and testing of double slope solar still and also optimization of glass tilt angle (25, 30, 35 and 40°) and water depth (1, 2 and 3 cm) in Saudi Arabian climatic conditions. Optimum tilt angle was found to be 35° for both summer and winter seasons, and also productivity increases with reduction in water depth. A number of existing energy and mass balance equations were used to validate experimental results. Numerical and experimental results were in good agreement with an RMS error of 5-10%.