Al-Hayeka and Badran have found the productivity of freshwater of two different designs of stills, which are asymmetric greenhouse with mirror and symmetric greenhouse solar stills, under the climatic conditions of Jordan. They found that the 23° cover tilt angle, 0.1-m insulation thickness, and asphalt coating of solar still of the shallow water basin are the optimum parameters for producing higher yields. have studied the effect of climatic, design, and operational parameters such as solar intensity, wind velocity, ambient temperature, glass cover slope angle, feedwater temperature water depth on the basin, and basin material on the distillate output of the basin-type solar still.
It has been shown that for the active and multi-effective passive stills, daily productivity increases with the increase of wind velocity up to a typical velocity beyond that, the productivity becomes insignificant for single-effect passive stills. The effect of wind speed on daily productivity of some active and passive solar stills using computer simulation for different solar still designs has been studied by El-Sebaii.
have studied the basin-type solar still under local climatic conditions and concluded that lower water depth and salinity of the brine produced higher distillate yields for the double-slope passive solar still. Garg and Mann have investigated the effect of climatic, operational, and design parameters for single- and double-slope solar stills under the Indian arid zone regions and to find the effect of all possible variables on the performance of the single-effect solar still. Results of the simulation indicate that water depth and thermal insulation have little effect on the productivity at shallow water depth and that a double glass cover and high cover slopes are not justifiable. A digital simulation method has been done for the productivity of a complicated still by Cooper, and the influence of more common variables such as water depth, wind velocity, still insulation, double glass cover, cover slope, and daily variability on the productivity has been investigated. įurther attempts have been made by researchers to investigate the effect of water depth in double-slope single-basin solar still. Many researchers have found the productivity for different brine depths in the basin of a single-slope single-basin solar still. A solar still is a simple device which is used in converting brackish/saline water into potable/drinkable water. Supplying drinkable water is one of the major problems in developing countries. Water is very much essential for human beings.
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