This study introduces a novel solar still (SS) design that stores energy in a
phase change material (PCM) with the use of fins. Three distinct types of
stills were considered for this study of the fin and energy storage unit.
Type I stills were conventional type, whereas Type II stills added round
hollow fins above the basin liner. As with type II, type III used fins in
addition to a PCM packed energy storage unit located below the basin
liner. Over the basin liner, fins were added to the absorber to increase its
surface area. Experiments were conducted using all three types, with the
water level in the basin maintained at 3 cm throughout. It was calculated
that CSS may produce up to 3.25 L/m2/day. In contrast, type II and type III
show increases in production of 17.54% and 48.61%, and 55.69%
respectively. In addition, modified solar still (MSS) is proven to have a
shorter payback period than conventional solar still (CSS).