Power pilot installation: 50 kW. Current gain of 2,6 W/m2 membrane, should be lifted towards 5 W/m2. Potential for Dutch electricity generation: 200 MW. Estimated global potential: 5% of total energy consumption. Key technological challenge: combat pollution membranes.
Osmotic power or salinity gradient power is the energy available from the difference in the salt concentration between seawater and river water. Two practical methods for this are reverse electrodialysis (RED) and pressure retarded osmosis (PRO). Both processes rely on osmosis with ion specific membranes. The key waste product is brackish water. This byproduct is the result of natural forces that are being harnessed: the flow of fresh water into seas that are made up of salt water.
The King Willem-Alexander opens the installation (that is already operational for a year).
[rt.com] – New research to turn salty oceans into a renewable energy source