Osmotic
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EU to meet 2020 renewable energy standards
Posted by admin2 on 13 Mar 2010 | Tagged as: Biofuel, Biomass, Conservation, Geothermal, Hydro, Ocean Energy, Osmotic, Solar, Wind
The member nations of the European Union expect to achieve 20.3% renewable energy consumption by 2020, exceeding the 20% target.
In a summary of national forecasts, the Commission says the EU will reach an overall share of 20.3% from renewable sources. 10 of the 27 member states are likely to exceed their targets for renewable energy, with another 12 countries to meet their goals domestically.
Iceland looks at osmotic, tidal energy
Posted by admin on 24 Dec 2009 | Tagged as: Ocean Energy, Osmotic
Iceland plans to build prototype tidal and osmotic power plants in the West Fjords within the next few years.
When you have a saline mass of water on one side and freshwater on the other, chemical energy separates these masses. The system uses a special diaphragm which lets the freshwater through from one side but does not let the saline water through in the opposite direction. This means that the freshwater penetrates into the saline with a resulting increase in pressure on the saline side,” the professor said.
This pressure is consequently used for powering a generator. The pressure can amount to 100 m of water column and can subsequently be used to move a generating wheel linked to an electric generator,’’ Sigfusson said. “At an estuary, two such masses of water meet. If you constantly design a situation where the freshwater and saline waters meet, you can harness this set pressure difference.
