Abstract
This paper describes analysis of performance of OTEC plant using an integrated hybrid cycle (I-H cycle). The integrated hybrid cycle is a combination of a closed cycle OTEC plant and a spray flash desalination plant. The optimization of using an integrated hybrid cycle is analyzed by the method of steepest descent. The total heat transfer area of heat exchanger per net power is used as an objective function. The numerical results are shown for a 10 MW integrated hybrid cycle with plate-type heat exchangers. Ammonia is used as a working fluid. The results are compared with that of a joint hybrid cycle (J-H cycle) system.