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Abstract

In this work, an attempt was made for improving the performance of single basin solar still using Omani rock stone bed as an energy storage medium. The Omani rock stone bed would absorb solar energy during day time and would release the energy for vapourizing the seawater during night time. Two sets of experiments (one without rock stone bed and another with Omani rock stone bed) were conducted in this study. The productivity and thermal efficiency of the still in both cases were analyzed. It was observed that the use of Omani rock stone bed was able to produce 2.5 liters of daily yield and able to obtain 25% thermal efficiency, which are about 19% greater than the performance of the solar still with the absence of stone bed. The quality of fresh water was verified through water quality test and confirmed its suitability for the domestic use.