Evaluating the Performance of a Single Basin Solar Still with Annulus Fins

Abstract

This article evaluates the performance of single basin solar still with circular annulus fins. Two systems are examined in this regard: a 1 m² solar still without fins (conventional solar still) and another solar still with fins. A total of 60 black steel fins (33.5 mm diameter, 40 mm height, and 3.3 mm thick) were welded onto a 6 mm black steel absorber. In July 2021, the performance of conventional and finned solar stills at various saline water levels (1 cm, 2 cm, 3 cm, and 4 cm) was evaluated. The results show that the productivity of the solar still increases with decreasing saline water level, with 1 cm being the most productive for both stills. The solar still with fins produced 4.52 Littre per day for the 1cm basin water depth, whereas the conventional solar still had 3.6 Littre per day.