Recent Posts

Off-Grid Solar Desalination

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Water and Energy are the two most basic and important aspects of off grid living.  Since 2001, Sisyan has shown that Solar Photovoltaics and Reverse Osmosis Desalination can make for a reliable, efficient source of energy and water.  Until recently, the lead acid batteries required to produce water around the clock have accounted for over 60% of the cost of …

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Minimum Energy Requirement for Desalination

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Desalination Will Be Necessary A 40% gap between freshwater supply and demand is predicted by 2030, and the stress on natural water systems can be seen now in every part of the world. In addition to all methods of water recycling and conservation, new sources will be necessary. Seawater is the only sources that is drought-proof and virtually inexhaustible. Unfortunately, …

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Water Energy Management

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Energy Management for Reverse Osmosis Desalination Desalination is responsible for 200 million tons of CO2 emissions a year, significantly contributing to global warming.  Of course, global warming also contributes to drought highlighting the water-energy nexus. Energy management is the most important aspect of reducing CO2 emissions associated with desalination.  Although Reverse Osmosis (RO) consumes 4 times less energy than thermal desalination …

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