Table 1 Different steps of an RO desalination site powered by a tidal stream generator plant.
From: Enhancing mass transfer in RO membranes powered by tidal energy using static mixers: a CFD study
A coupled RO desalination plant with the tidal stream generator | |
|---|---|
Tidal Stream Generator | |
Steps | Process |
Site selection | Identify optimal locations with strong tidal currents. |
Installation | Anchor turbines to the seabed or mount on floating platforms. |
Turbine design | Use horizontal-axis or vertical-axis turbines designed for underwater operation. |
Energy capture | Blades are turned by moving water, capturing kinetic energy. |
Energy conversion | The generator converts mechanical energy from blades into electrical energy. |
Power transmission | Transmit electricity from the underwater generator to shore via underwater cables. |
Integration with the RO plant | Use generated electricity to power high-pressure pumps of the RO plant. |
RO Plant Process | |
Steps | Process |
Pre-treatment | Filter, dechlorinate, and add anti-scaling chemicals to incoming seawater. |
Pressurization | Pressurize pre-treated seawater with high-pressure pumps powered by tidal energy. |
RO membranes | Force pressurized seawater through semi-permeable membranes, yielding freshwater and brine. |
Optimising by a static mixer | Incorporate a static mixer to improve mixing and reduce concentration polarization. |
Energy Recovery | Use ERDs to capture and reuse energy from high-pressure brine. |
Post-treatment | Adjust pH and add necessary minerals to freshwater for safe drinking water. |
Storage and distribution | Store treated water in tanks for distribution; discharge concentrated brine back to the ocean. |
