현장계측에 의한 조류 발전용 수차의 효율 평가

Abstract

The Korean peninsulas has a number of coastal sites where the rhythmic rising and lowering of water surface due to tides results in strong tidal current. The kinetic energy of these currents can be efficiently exploited by use of tidal current turbines. The polot tidal power plant is to be constructed at the Uldolmok narrow channel between Jindo and Haenam during next year and extensive castal engineering research works have been carried out. This paper describes and analyzes some observation results of field test about the efficiency of Helical turbine for tidal current power plant. The efficiency of turbine, which is diameter 2.2m and height 2.5m is evaluated measuring RPM, torque, and current velocity. The tested turbines had the maximum efficiencies of the bounds of 25 to 35% in the current velocity range between 1.4 and 2.6m/s. This result shows that the pilot tidal current power plant need three helical turbines with diameter 3.0m and height 3.6m to produce electric power 500kW.