Importance

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Abstract

A portable, collapsible still includes an upper reservoir for coolant water, an intermediate condensing chamber, and a lower reservoir of an aqueous solution, for example, seawater. A condenser coil is in fluid communication with the headspace in the lower reservoir above its fluid level, with the coil extending into the condenser chamber and to an external fluid port. A reflector is positioned below the lower reservoir, to reflect sunlight onto the lower reservoir to heat it. As the water vapor pressure in the lower reservoir increases as a result of the solar heating, the water vapor enters the coil, which is bathed in the lower temperature coolant water from the upper reservoir, causing the water vapor to condense inside the coil and thus be available for drinking.

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First Claim