![]() Tidal Barrages Provide Protection Against Flooding The systems used to harness tidal energy are submerged and the noise pollution produced under water is low. Tidal energy produces clean electricity without releasing greenhouse gases, so it is considered an ideal source of power that can reduce our dependence on fossil fuels such as coal, oil and natural gas. Can Reduce Our Dependence On Fossil Fuels Has A Low Visual Impactīeing located under water, the systems used to harness the power of the tides have a very low visual impact. Is A Predictable Source Of Clean Energyīecause there are two tidal cycles in a lunar day (24 hours and 50 minutes) and the level of the high and low tides are predictable, we can say that tidal energy is a known source of clean electricity ideal for the electrical grid. Is A Renewable Energy Sourceĭue to the fact that the high and low tides are created by the gravitational forces of the Moon and Sun we can say that tidal energy represents an infinite resource of clean energy. There are several advantages produced by tidal power as a renewable energy source. ![]() The difference between the low and the high tide (tidal range) must be at least 7 meters. Tidal BarragesĪ tidal barrage is a dam that utilizes the potential energy generated by the change in height between the high and the low tides. With the central rotor removed, marine life has a corridor through which can get out and escape from the rotating turbine. Modern tidal turbines will have the central rotor removed to protect marine life that can be caught by the rotor and the rotating blades of the underwater turbine. The blades of the turbine will be shorter and stronger, and as I mentioned earlier, the turbine must spin in both directions forward and backward, so the generators used to turn the kinetic energy of the tides into clean electricity will be reversible electrical generators. Tidal turbines look like wind turbines, but more robust because they need to work in strong sea currents. There are several systems used to harness the power of the tides today, such as: tidal turbines, tidal barrages and tidal fences. Tidal power plants can be installed only along coastlines because coastlines receive two high tides and two low tides every day. Systems Used Today to Harness Tidal Energy The shape of the turbine can be also different because some modern tidal turbines have no central rotor in order to protect marine life. This type of turbines will use reversible electrical generators, which are more expensive than the single direction generators. The only difference is represented by the fact that the turbines used to produce clean electricity from tidal energy can spin in both directions (forward and backward) because the tides are moving forward at high tide and backward at low tide. The turbines used to transform the kinetic energy of the tides into clean electricity using generators are almost similar with the turbines used to produce hydropower. ![]() How Does Tidal Power Generate Clean Electricity?īeing a predictable and regular source of clean power, tidal energy can be used to generate clean electricity. The weak tides are creating a very small difference between the high and the low tide in the same tidal cycle.Įven if we have two tidal cycles every lunar day (24 hours and 50 minutes), we can say that tidal energy is a predictable source of power, so tidal energy can be considered a renewable energy source that is predictable and regular, not an intermittent source of clean energy such as solar and wind power.
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