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Renewable Energy From The Deep Ocean

(kulpims)
1 decade 6 years 7 months 3 weeks ago

Ocean thermal energy conversion (OTEC) is a method for generating electricity which uses the temperature difference that exists between deep and shallow waters to run a heat engine. As with any heat engine, the greatest efficiency and power is produced with the largest temperature difference. This temperature difference generally increases with decreasing latitude, i.e. near the equator, in the tropics. However, evaporation prevents the surface temperature from exceeding 27 deg.C (80 deg.F). Also the subsurface water rarely falls below 5 deg.C. Historically, the main technical challenge of OTEC was to generate significant amounts of power, efficiently, from this very small temperature ratio. Changes in efficiency of heat exchange in modern designs allow performance approaching the theoretical maximum efficiency.
from wikipedia, video via hight3ch.com