1MW 해수온도차 발전 플랜트의 터빈 형상 최적화를 위한 유동 해석

Abstract

According to the Renewable Energy White Paper 2018 published by Ministry of Trade, Industry ad Energy, renewable energy is 24 percent's share of world power supply in 2016. The portion of this renewable energy is forecasted continuously increase until it has 63 percent share by 2040. In this study, a fluid analysis is conducted to optimize the shape of turbines used in the 1MW OTEC plant which had the demonstration test in last September. Grid dependency test is conducted and the two phase model is applied to cover condensation in the rotor exit. Then, computational fluid dynamics using the 1MW OTEC turbine are performed and show the power of 1,284kW and mass flow rate of 125kg/s. The optimization is performed using the velocity vector and contour in the rotor inlet and the absolute angle at the rotor exit. In conclusion, the relative angle in the rotor inlet should be smaller and blade angle should be adjusted along the spanwise direction to make uniform relative angle distribution in the rotor exit.