海洋温度差発電プラントの設計と制御のための計算機シミュレーションの開発

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  • Computer Simulation Developments for OTEC Plant Design and Control

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Ocean thermal energy conversion (OTEC) is a system that converts heat energy into electricity by using the temperature difference between warm surface sea water and cold deep sea water. Computer simulation plays an important role in designing and controlling the system. It helps to grasp precisely the characteristics of the system and therefore, enhance an effective and steady operation of the system.<br>This paper describes the computer simulation for a generating system based on OTEC plant. To construct this computer simulation, the system was broken down into three parts; Evaporator, Condenser and Turbine, and mathematical equation models were obtained for earth parts by using physical theories and reflecting properly the structual feature. Through these mathematical equations, we constructed a computer simulation for the OTEC plant. By using this computer simulation, we examined the operating characteristics of the plant for the following cases; (1) A drastic change in sea water temperature. (2) A drastic change in sea water flow rate and working fluid flow rate. We then compared the experimental result with the computer simulation result obtained. We confirmed that this computer simulation expresses the dynamic characteristics well.<br>The results obtained from this computer simulation will be used effectively to determine the plant specifications and to evaluate the economic prospectives of the OTEC plant.

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