This document summarizes the design, fabrication, and testing of a modified single slope solar still. Key findings include:
1) The still was tested in Allahabad, India and found that a glass condensing cover produced 64% more distillate than a PVC cover.
2) Temperature measurements showed the glass cover reached higher temperatures than the basin water, with the largest difference occurring in the afternoon.
3) Over six days of testing, the still produced an average of 2.25 liters of distillate daily, with an efficiency as high as 39%.
4) The total fabrication cost of the still was estimated at 10,600 rupees, with a payback period of