Modeling and assessing the potential of the Boqueiráo channel for tidal exploration

Exploring the energy potential of the oceans is a promising alternative to produce clean energy with a reduced environmental impact. Brazil has a significant tidal potential, particularly in the coastal region of the north, which covers the states of Amapa, Para and Maranhao. The Boqueirao Channel, located in Sao Marcos Bay in Maranhao, is recognized for its wide tidal variability and strong tidal currents, which shows it has a significant tidal potential. This article examines the energetic characterization of this estuary in terms of tidal currents. Based on measurements taken in situ using an Acoustic Doppler Current Profiler and a Conductivity, Temperature and Depth sensor, the area is modeled in Delft3D software, with velocity results adjusted and validated to allow accurate representation of tidal currents. The theoretical potential of an area of 1.5 km2, considering a hydrokinetic turbine with diffuser, was estimated at 85.75 GWh. The results obtained are compared with those in the literature. Taking into account the available area and the physical constraints of the channel, it is possible to estimate a Levelized Cost of Energy -LCOE of 0.185 $kWh-1 for the projected hydrokinetic farm.

Automated summary

Brazil's Boqueirao Channel in Sao Marcos Bay has significant tidal potential. Measurements and simulations suggest a potential tidal energy of 85.75 GWh, with an estimated Levelized Cost of Energy (LCOE) of 0.185 $kWh-1 for a projected hydrokinetic farm.