SELECT THE INSTALLATION POSITION OF THE POWER GENERATOR CONSIDERING THE TURBULENCE IN TIDAL CURRENT POWER GENERATION USING BRIDGE PIERS

Abstract

Tidal current power generation using bridge piers was verified by selecting the installation optimal position of the power generator considering the turbulence. As a case study, south-east end of 4th pier of Oshima-ohashi Bridge over Obatakeseto Strait in Yamaguchi Prefecture targeted. Tidal currents observation was carried out installing AD2CP on the sea bottom. AD2CP was installed at 3.0 m south of the bridge pier. At the same time, similar observation was carried out in sea area where is not affected by bridge piers. Observation was conducted at 40.0 m south of the bridge pier. Tidal currents distribution was observed at 8 Hz in the vertical direction. The water depth range was about 1.0 m to 21.5 m deep, and the observation was carried out at 42 layers with 0.5 m thickness. Tidal currents distribution and turbulence intensity were compared vicinity the bridge piers and in sea area where is not affected by bridge piers. And the installation optimal position of tidal current power generator using bridge piers was selected considering the turbulence.