Advantages
- A shroud of suitable geometry can increase the flow velocity across the turbine by 3 to 4 times the open or free stream velocity.
- More power generated means greater returns on investment.
- The number of suitable sites is increased as sites formerly too slow for commercial development become viable.
- Where large cumbersome turbines are not suitable, smaller shrouded turbines can be sea-bed-mounted in shallow rivers and estuaries allowing safe navigation of the water ways.
- Hidden in a shroud, a turbine is less likely to be damaged by floating debris.
- Bio-fouling is also reduced as the turbine is shaded from natural light in shallow water.
- The increased velocities through the turbine effectively water-blast the shroud throat and turbine clean as organisms are unable to attached at increased velocities.
- Described as 'eco-benign', the slow r.p.m. of tidal stream turbines does not interfere with marine life or the environment and has little or no visual amenity impact.
Read more about this topic: Shrouded Tidal Turbine, Types of Shroud
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