Blue Energy
Rather than sunlight or wind power, sustainable energy research is now focussing on “blue energy” which will produce electricity using only sea and river water as a new source of renewable energy.
- Osmotic Power
Demonstration movie
Reverse electrodialysis
Systems for the desalination of seawater using electrodialysis insert seawater between a cation exchange membrane and an anion exchange membrane. Fresh water is produced by getting the ions to move through application of electrical pressure. Reverse electrodialysis is the reverse of this process, and is a method of producing electical energy from seawater and freshwater. This method is also called gradient power or concentration cell. If the ratio of concentration is 30 at either end, then a power output of 1.2W per each pair of cation/anion exchange membranes at 1m2.
Demonstration movie