THE EFFECCT OF INITIAL WATER DEPTH ON THE PERFORMANCE OF A SINGLE SLOPE SOLAR STILL IN YOLA, NIGERIA
Abstract
The distillation of shallow-well brackish water by the use of solar still is one of the promising
methods adopted in arid zones. The population increase, economic development, in addition to
global warming are creating imbalance between supply and demand of fresh water. Many
developing countries faces the challenge of accessing the portable water for uses in homes and
clinics despite the availability of sun shine in these regions. In this paper, a single-basin single
slope solar still was design and constructed in Yola Nigeria (longitude 13oE, latitude 9.23oN)
the Daily distillate was 1.49 litres at an initial water depth of 3.0 cm and 3.3 litres at an initial
water depth of 0.5 cm. A maximum average efficiency of 28% was obtained. The performance
evaluation for different initial water depths (0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, 2.5 cm and 3.0
cm) reveals that the daily cumulative yields are 3306 ml. 2616 ml, 2224 ml, 2006 ml, 1698 ml,
1493 ml, 1490 ml, respectively.
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