Chul-Hee Jo
Inha University, S. Korea
Title: Application of single point mooring concept to ducted tidal current device
Biography
Biography: Chul-Hee Jo
Abstract
The importance of renewable energy has been increased with the great concern for global climate changes and intranational agreement to reduce the carbon emission. Among various renewable energy sources, the ocean energy has a great potential to substitute the fossil fuel in the future considering the great amount being present in the earth. The tidal energy however is considered as very reliable, sustainable and predictable energy among ocean energies. Even tidal barrage is also very predictable energy, many project over the world have been delayed or cancelled due to the significant environmental impacts. The tidal current power (TPC) is now regarded as the one of best ocean energies with the minimum environment impact. It is ideal to apply TPC in the areas with strong current. As the energy is proportional to cube of current speed, the duct implementation can increase the inflow velocity resulting in higher power production. This approach can extend the application of TPC in relatively low current regions. The effect of duct is dependent on various parameter including its configurations of inlet and outlet, inner and outer diameters, overall length, etc. In this research study, the duct design was optimized for a floating TCP system and the extensive CFD analyses together with the physical model test in a circulating water channel (CWC) are presented. Even the floating concept for TCP can improve the economic feasibility, it is very important to understand the dynamic behavior for various attack flow conditions. The analysis results from the 6 degrees of freedom movement in time domain based on the hydrodynamic coefficients in frequency domain using impulse response function (IRF) method, Orcaflex software and Matlab are introduced in this paper.