Solar Water Desalination


Solar desalination is a technique to desalinate water using solar energy. In general, there are two different designs for solar stills: electrically and mechanically driven systems which utilize reverse osmosis and thermally driven systems.

Reverse osmosis is a pressure-driven process that forces the separation of fresh water from other constituents through a semi-permeable membrane. This is the preferred method in large-scale desalination implementations where electricity is cheaply available. Here, solar energy is collected and converted into electrical or mechanical energy to initiate the process.

The solar humidification-dehumidification (HDH) process (also called the multiple-effect humidification-dehumidification process, solar multistage condensation evaporation cycle (SMCEC) or multiple-effect humidification (MEH), is a technique that mimics the natural water cycle on a shorter time frame by evaporating and condensing water to separate it from other substances. The driving force in this process is thermal solar energy to produce water vapor which is later condensed in a separate chamber.



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Residential applications

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Commercial applications

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