ocean thermal energy conversion

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ocean thermal energy conversion

Ocean Thermal Energy Concept (OTE)To operate a sea solar power plant involves both a heat source and a heat sink. Therefore, the 80 degrees F surface water in the tropical oceans serves as the heat source and typically 3,000 feet below the surface is the heat sink or the cold bottom water, which is 40 degrees F. This temperature difference or delta T is sufficient to operate vapor turbines, which drive generators and produces electricity and fresh water as a byproduct. SourceEnergy in the ocean can be found in the upper layers of tropical oceans because of heat is collected in that area.How it worksThe warm surface ocean water is pumped to the boiler, which transfers heat to the working fluid, turning it into a high-pressure vapor. The turbine generator spins as the vapor rushes through it to reach the low-pressure condenser, which is cooled by the nearly freezing water brought up from the ocean depths. After condensing, the working fluid is sent back to the boiler to be reused and to repeat the cycle.Pumps are needed to bring the cold water up from the deep and through the condenser. Other pumps move the warm water through the boiler. The power for moving these very large water flows, plus the power to move the working fluid from the condenser to the boiler, consumes about 20% of the total power generated (120MW Gross for 100MW Net).Costspower generation costs as low as US $0.07 per kilowatt-hour, compared with $0.05 - $0.07 for subsidized wind systems. The cost to build these power plants are not specified but it is the most expensive despite the fact that the system does not have fuel costs and produces useful by-products

Ocean Thermal Energy Conversion

By:Mikah SatoBrooke AlbeteAnna Walker


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