熱機関の不可逆損失を考慮した海洋温度差発電の出力特性に関する研究

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  • Characteristics of Net Power in Ocean Thermal Energy Conversion System Considering Heat Engine Irreversibility

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Ocean thermal energy conversion (OTEC) is a system to convert the ocean thermal energy stored as the vertical temperature gradient in the ocean into the electricity. In OTEC system, each component has the irreversible loss such as heat exchanger, turbine and pumps, and they are not negligible for the net power production. This research describes about the theoretical net power on OTEC considering irreversibilities in the heat engine, heat exchange process and fluid flow of heat source using the coefficient of irreversibility and effectiveness of heat transfer, and compared with the 30 kW OTEC experimental results using difference type of heat exchangers. As the result, theoretical results shows the equivalent irreversibility of the heat engine of the experimental apparatus in the case of the two heat exchanger, which shows the effectiveness of the theoretical study using finite-time thermodynamics.

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