Abstract
A basin-type solar still has been developed that is practical and economical to use in some parts of the world. Materials of construction and performance characteristics, as determined from extensive field testing and from analytical and laboratory investigations, are discussed. These studies indicate that the primary factor affecting still productivity, in addition to solar radiation, is basin depth. Of the many still designs and materials evaluated, one basic design and combination of materials appears most promising. An Office of Saline Water report giving details on the construction of such a still has been published. This paper describes that still briefly. An economic comparison of vapor-compression, flash-distillation, and basin-type solar stills shows that the solar still produces water at the lowest cost when plant capacity is below 50,000 gallons per day.
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