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Investigation of Current Energy Converter System Array Power Production – A Case Study in the Mississippi River

Abstract

Site and resource assessment are conducted at the Mississippi River near St. Louis, MS, to identify locations suitable for Current Energy Converter (CEC) deployment. Several CEC array configurations are then simulated to study the power production at the potential deployment site. As part of the study, a shallow water hydrodynamic model Delft3D Flexible Mesh is constructed using inflow discharge and outflow water level boundary conditions from historical field data, to simulate a wide range of flow conditions according to the International Electro-technical Commission (IEC) TC 114 62600-301 River Resource Assessment Technical Specifications.   The numerical model is built to cover approximately 112km of the Mississippi River segment. Five different flow percentiles, 15th, 25th, 50th, 75th, and 90th, are simulated. Previous results on spatial and temporal convergence, as well as bed roughness coefficients are employed in constructing the simulations. Water levels are successfully calibrated within 5% of the measured data at the gaging stations. For the case study, a relatively flat channel section with high velocity suitable for CEC array are identified. The river current turbine (Department of Energy (DOE) Reference Model 2) are employed in this project. Two array configurations including 1 isolated turbine and 10 turbine systems are simulated to study the power production. The power production of the array for each flow percentile are reported.