Thermal-electrical, high efficiency solar stills

Nikolai Nijegorodov, Pushpendra K. Jain and Stig Carlsson

Renewable Energy, 1994, vol. 4, issue 1, 123-127

Abstract: The paper describes two solar thermal-electrical methods to purify water by distillation. In the first method air saturated with water vapour is removed from a basin type still by using a low power exhaust fan, and is passed through a condenser where the latent heat of water vapour is used to pre-heat the mineralised water for the basin. This also results in lower temperature for the glazing and a faster rate of evaporation from the basin. The net effect in an increased thermal efficiency of the still, more than twice the thermal efficiency of the conventional still. In the second design a concentrator-collector is used to boil water in the absorber tube. A low power vacuum pump is employed to lower the boiling temperature of water by about 10°C. The yield of distillate from the still is nearly doubled.

Date: 1994
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:4:y:1994:i:1:p:123-127

DOI: 10.1016/0960-1481(94)90074-4

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