Abstract
Small islands in Indonesia sea water are current heavily dependent of fossil fuels. Environmental concerns at global, regional and local levels, past and recent price hikes in the price of oil among others, have been drives behind a regional wide interest in renewable energy technologies. One of the renewable energy resources is the he temperature difference between the upper layer of warm sea water and the bottom layer of cold sea water. As long as the temperature between the warm sea water and cold deep sea water differ by about 18 to 24 OC, an Ocean Thermal Energy (OTEC) system can produce a significant amount of electricity. The sea area in Indonesia region is ideal for OEC power plant to generate electricity for small islands, because the sea area in Indonesia have average monthly temperature difference between 20 to 22 OC of warm sea water surface and colder sea water in the bottom layer. Therefore OTEC is very promoting as an alternative energy source for small islands. OTEC has important benefit other than power production, as by product of OTEC, support chilled soil agriculture, aquaculture, fresh water, mariculture and OTEC power plant is not source of environmental pollution. In this study, we presently propose an OTEC system that utilizes not only thermal energy but also mariculture, chilled soil agriculture, aquaculture, fresh water as by product of OTEC power plant.