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Study and Development of Closed-Cycle Systems of Ocean Thermal Energy Conversion
Pages: 109-121
Year: Issue:  6
Journal: Journal of Ocean Technology

Keyword:  Ocean Thermal Energy Conversion(OTEC)working fluidRankine cycleKalina cycle;
Abstract: This paper has briefly reviewed the progress of the Ocean Thermal Energy Conversion(OTEC)generation and development, and summarized the current situation on how working fluid employed in the OTEC cycle system affects the efficiency of energy circulation, and the research developments of Rankine cycle and non-azeotropic working fluid cycles, such as Kalina cycle. Most current studies on efficiency improvement have been concentrated on the selection of working fluid consisting of pure and non-azeotropic working fluids, the increment of evaporation temperature, the decrease of the condensation temperature, and the utilization of the regeneration, extraction, reheat and ejector. Although the cycle efficiency has been increased from 3% of basic Rankine cycle to 5% of Uehara cycle and Guohai cycle at present, the up-to-date research seems more theoretical rather than experimental. Meanwhile, other problems also exist such as only a few choices available for non-azeotropic working fluid.
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