Abstract
In this work, a vertical solar still was constructed in Basra city in Iraq. Anexperimental achievement was carried out on two solar stills under the same conditions.Also, each still has one evaporative side. The still contains a basin with the total area of(0.125 m2). The still basin covers with a piece of black cotton cloth wet with brackishwater. In addition, one of the still was provided with an external reflector, in order toreflect the direct sunlight to the absorber surface. The solar still was prepared fromavailable local materials. We found in this experimental study that the efficiency withoutany improvement vertical solar still is (17.6 %) and increases to (38.2 %) by usingvertical solar still with external reflector of the day 17 July 2012.
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