The more we use renewable energy, the more we benefit the environment, strengthen our energy security, create jobs locally, and help improve our economy. (NREL, USA) Still in experimental stage, not common Three types: Waves energy Tidal energy Ocean thermal energy When the air flows, turbine is turned and it would drive the generator. Electricity is produced. Tidal energy similar to hydropower plant dam traps the sea water when high tide when tide drops, water flow turns the turbine and drives the production of electricity of generator Ocean thermal energy application of the temperature difference of sea water Oceanic Thermal Energy Conversion OTEC utilizes the oceans 20C natural thermal gradient between the warm surface water and the cold deep sea water to drive a Rankine Cycle OTEC utilizes the worlds largest solar radiation collector - the ocean. The ocean contains enough energy power all of the worlds electrical needs. 1. Power input to pumps to start process 4. Expanding vapor drive the turbine, and electricity is created by a generator 5. Heat extraction from cold-water sink to condense the working fluid in the condenser. Cycle begins again Return to step 2 3. Heat addition from the hot- water source used to evaporate the working fluid within the heat exchanger (Evaporator) Controls Water Pump Fluid Pump OTEC CPU Turbine Generator Heat Exchangers Pipes Working fluid (Noise Factors) Temperature Sea state Weather Corrosion (Output Functions) Power Water (Input Signals) Water Startup Power OTEC System 1.Clean energy production 2.Fresh water production 3.Continuous power 4.Energy independence 5.Aquaculture enterprises 6.Air-conditioning/refrigeration 7.Mineral extraction Low efficiency High capital costs for initial construction Potential ecological consequences Siting considerations Must operate in a corrosive marine environment