Journal of The School of Marine Science and Technology,Vol.6 No.1
Recovery of Sea and Tidal Current Energy in Japan’s Exclusive
Economic Zone using Straight-Wing Vertical-Axis Hydro Turbine
Tadashi TORII, Kinji SEKITA and Kazuichi SEKI
Abstract
Even the sea and tidal current are widely distributed whole through the ocean, the density of their energy are relatively low same as the wind one.However, the flow of the sea current is steady,the flow of the tidal current is cyclic and the density of energy increases in the water where the fluid concentrated.Since the reduction of the global warming gas and the switching of energy resource from the fossil fuel to renewable energy are the common issue of the human beings at present, this paper focused to realize the recovery of the sea and tidal current energy as a utilization of the renewable energy in the Japan’s Exclusive Economic Zone(EEZ).The first,the quantity of current energy passing through the Japan’s EEZ is shown.Then,the Straight-Wing Vertical-Axis Turbine(SWVAT),which has a lot of truck record as wind turbine,is adopted as the hydro turbine to recover the energy from the current,and its applicability to the water flow with wave as a natural sea condition is studied. Finally, the recoverable amount of the current energy by using the SWVAT is calculated.