Tidal fences work by utilizing multiple tidal turbines connected together in a single, fence-like structure to harness the energy of tidal currents.
Understanding Tidal Fences
Tidal fences are essentially arrays of tidal turbines arranged vertically along a supporting structure. This approach differs from single, standalone tidal turbines. The key aspects of how they function include:
- Multiple Turbines: A tidal fence isn't just one turbine, but a series of them, all linked together. This allows for the capture of a larger volume of moving water.
- Single Structure: These multiple turbines are attached to a single structure, forming what is referred to as a "fence."
- Combined Power Generation: By combining multiple turbines within a fence, the tidal fence effectively concentrates power generation in a specific location.
- Array Formation: Often, multiple tidal fences are grouped together to create a tidal array. These arrays further amplify power output to supply large amounts of power to generators.
How They Generate Power
- Tidal Flow: As tides flow in and out, the water currents push against the turbine blades within the fence.
- Rotation: This force causes the turbines to rotate, similar to how wind turns a wind turbine or water turns a hydroelectric turbine.
- Electricity Generation: The rotation of the turbines drives generators, which convert the mechanical energy into usable electricity.
- Grid Connection: The electricity generated is then transmitted through cables to the electricity grid, where it can be distributed to homes and businesses.
Advantages of Tidal Fences
- Concentrated Power: By grouping many turbines together, tidal fences efficiently generate substantial amounts of electricity in one location.
- Scalability: Tidal fences can be adjusted by adding or subtracting units to match energy demands.
- Predictable Energy: Unlike wind or solar, tidal energy is highly predictable as tides are governed by lunar cycles, offering a consistent source of renewable energy.
Practical Examples
- Some pilot projects have seen tidal fences deployed across channels or inlets.
- These often consist of multiple turbines housed in a steel framework that is anchored to the seabed.
- The combined power output from an array of such fences can be significant enough to power entire communities.
In summary, tidal fences are a powerful method for extracting clean and predictable energy from tidal movements. They combine multiple turbines into a single structure, allowing for concentrated and efficient power generation.
