10 Dec '12, 1pm

Solar Energy and Water: Solar Powering Desalination #solarenergy #solartech

Energy-intensive desalination plants have traditionally run on fossil fuels, but renewables, particularly solar power, are now beginning to play a part. Around half the operating cost of a desalination plant comes from energy use, and on current trends Saudi Arabia and many other countries in the region would consume most of the oil they produce on desalination by 2050. The dominant desalination technology at present, with around 60% of global capacity, is Reverse Osmosis (RO), which pushes brine water through a membrane that retains the salt and other impurities. Thermal desalination uses heat as well as electricity in distillation processes with saline feedwater heated to vaporise, so fresh water evaporates and the brine is left behind. Cooling and condensation are then used to obtain fresh water for consumption. Multi Stage Flash (MSF), the most common thermal technique...

Full article: http://www.renewableenergyworld.com/rea/news/article/2012...

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