抄録
This paper describes the performance analysis of the Integrated Hybrid Ocean Thermal Energy Conversion (I-H OTEC) system and an oceanographic investigation for effective utilization of ocean thermal energy offshore of Tsushima Island which is one suitable site proposed for the I-H OTEC system. We made oceanographic observations in the area north west of Tsushima Island in August, October, and December of 2005; July, August, October, and November of 2006; and August, September, October, and November of 2007 to obtain physical and chemical data (water temperature, salinity, dissolved oxygen, nutrients), as well as topographic data using a research ship of the National Fisheries University, which is necessary for designing the I-H OTEC system. A conventional design for the I-H OTEC system is being conducted with these data. The total heat transfer area of heat exchanger per net power is used as an objective function. Numerical results are reported for a 1,000 kW I-H OTEC system with plate-type heat exchangers and ammonia as a working fluid. The objective function obtained is 10.1m2/kW when the warm sea water inlet temperate is 28.7°C and cold sea water inlet temperate is 4.1°C.
