الفهرس 
Chapter (1) IntroductionOnly 14 pages are availabe for public view
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Abstract
The productivity and efficiency of solar stills depends on different parameters. The evaporative surface area, ambient temperature, insulation, depth of water, wind velocity and number of transparent glass covers. In this work, the focus was placed to increase the evaporation surface area by using wick (pin-finned wick) on the performance of solar still. The experimental system involves two identical solar stills one of them is conventional and the other has an evaporation pin-finned wick surface. The fins are supported vertically on the basin of the still using steel wires. Outdoor experimental tests are conducted to investigate the effect of using pin- finned wick on the still productivity. Tests are carried out at wide range of ambient temperatures and solar radiation. Temperatures at different locations (glass surface, water in the still, wick surface and air-vapor mixture) as well as ambient temperature are recorded with time. Solar radiation as well as collected distillate are also recorded during the experiments at different operating days. Enhancing the still productivity is approved when pin-finned wick is applied in the still. System efficiency of about 58.35% is recorded when pin-finned wick is used. An enhancement in the still efficiency of about 18 % is recorded during this set of experiments. Results have shown that the average distillate productivity reaches 6630 mL /m2.day.