Implementation of the effect of turbines on water currents in MOHID Modelling System

Abstract

The present document describes the project of including into the hydrodynamic model of MOHID Studio application the effect of current energy extraction with turbines. This implementation intends to be a reliable tool for promoting renewable energies, in particular tidal energy, and allow users to study flow modification and energy extraction as well as other sub-consequent effects in a medium-big scale resolution ( for example water level effect or sedimentation transport). The implementation is thought for axial turbines that can turbine on both direction, with free rotation on the vertical axis and pitch control for the power harvested. It can work in 2D and 3D simulations, even though the turbine is only discretised in the vertical direction (for 3D simulations only), not in the horizontal plane. The horizontal resolution, in order to obtain useful results, must be as little as the dimension of the turbines blades. Biggest size of the grid works fine but graphically the results are inaccurate. The programming is made in Fortran90, the same language as MOHID Studio application, and the code is Open Source, so it is not included in this memory, it can be found in MOHID github repository [13].