Patent ID: 6440275
Filing Date: 2002-08-27
Classification: C02F,F28F,Y02A,Y10S

Abstract:
A solar still for producing fresh water comprising:means for absorbing solar radiation and for containing water to be distilled; a condensation surface on which vapor, produced by heating up of said water to be distilled, can condense; means for collecting fresh water that trickles down the condensation surface; a flexible, stretched, impermeable membrane of a dark color exposed to the sun; a hydrophilic fleece supplied with water by capillarity and gravity arranged in a shade and forming a covering for said membrane; means for recovering formed brine arranged at the bottom of said fleece; said impermeable membrane and its hydrophilic fleece constituting a wall of an elongated evaporation chamber installed underneath transparent sheltering means; said transparent sheltering means being a closed space, an inner face of a wall thereof constituting said condensation surface; and a blower for producing a flow of air in a closed circuit between the evaporation chamber and a condensation chamber constituted by the volume of said transparent sheltering means external to the evaporation chamber.