Study of a Solar Still Using a Concrete Slab as a Solar Collector

Abstract

A solar still using a concrete slab as a solar collector was developed. Brine was filmwisely fed into the grooves of parallel polyethylene ropes under the slab onto which a porous sheet was attached. The production of distillate depended strongly on the feed rate divided into three liquid flow rate regions: dry-out, effective, and independent. The result of simulation with respect to meniscus film flow shows that the mechanism of heat transfer is due to the surface area ratio of the sheet to the meniscus film.