Tidal power or tidal energy is an alternative energy source of hydropower from which you can generate electricity. As tidal energy doesn’t produce any greenhouse gases, you can call it clean energy also.
Actually, tidal energy is available to humankind since the generation of the ocean. Still, this sustainable energy source is overlooked by the hydro-engineering sector for many years. Especially the tidal power utilization in India is very low.
India has a huge potential to harness tidal energy as it got a large seashore. But the utilization of tidal energy in India for the generation of electricity is considerably low. If the Indian Government looks to harness tidal power, it will also open a new job market.
Tidal Electricity is an alternative energy source available to cope with up increasing demand for electricity. It is also a clean energy form like hydroelectric energy.
Read:- Hydroelectric Energy: Complete Information on one form of Clean Energy
In this post on tidal power, you will get all the information about what is tidal energy, how to capture tidal energy, tidal power plant work, tidal energy facts, tidal energy advantages and disadvantages, and the scope of tidal energy in India and much more.
So, let’s start to dive deep to know more about a sustainable energy source called Tidal power.
Tidal power, also called tidal energy, is a form of hydropower that converts the energy of tides into electricity.
When the earth and the gravity of the moon line up with each other, cause millions of gallons of the water flow towards the seashore. This creates a high tide. Likewise, when the earth and the gravity of the moon are 90 degrees to each other, the water flows away from the shore. This creates a low tide.
A large amount of energy within the tides of the ocean is known as tidal power or tidal energy.
Tides are more predictable than wind energy and solar power. But due to the limited availability of sites with sufficiently high tidal this renewable energy source is rarely used to produce electricity.
However, many recent developments in turbine technologies can capture more tidal energy and generate low-cost electricity.
As tidal power generation is relatively new, there are not a lot of tidal energy companies out there developing the technology yet. However, there are several tidal power plants in use, and commercial tidal energy power plants are increasing. So, let’s start with tidal energy generation.
The tides in the sea are harnessed in a similar way using waterwheels and turbines to that used to generate hydroelectricity. But because the tides can flow in both directions in a tidal energy system, they can generate power when the water is flowing in and also when it is ebbing out.
Therefore, tidal generators are designed to produce power when the rotor blades are turning in either direction.
The tidal electricity generation from tides is similar in many ways to hydroelectric generation. The difference in tidal energy generation is that the water flows in and out of the turbines in both directions.
The motion of the tidal water contains large amounts of kinetic energy in the form of strong tidal currents called tidal streams. These streams are used for tidal energy generation in a tidal power plant.
Tidal Energy Generation Systems can be classified into four generating methods,
A tidal stream generator, also known as a tidal energy converter (TEC), is a machine that extracts energy from tides.
Tidal streams are formed by the horizontal fast-flowing volumes of water caused by the ebb and flow of the tide. Hence tidal stream generators make use of the kinetic energy of moving water to power turbines. This is the exact same way wind turbines use wind to power turbines.
A Tidal Stream Generation system reduces some of the environmental effects of tidal barrages by using turbine generators beneath the surface of the water.
Tidal stream turbines generate tidal power on both the ebb and flow of the tide. As water is much denser and has a much slower flow rate, tidal stream turbines have much smaller diameters and higher tips.
The Tidal barrages are among the oldest methods of tidal power generation. A tidal barrage is a dam-like structure used to capture the tidal energy from masses of water moving in and out of the seashore.
Barrages have a number of underwater tunnels cut into their width allowing seawater to flow through them in a controllable way using sluice gates.
Tidal barrages generate electricity using the difference in the vertical height between the incoming high tides and the outgoing low tides.
As the tide ebbs and flows, seawater is allowed to flow in or out of the reservoir through a one-way underwater tunnel system.
The flow of tidal water in and out causes the water turbine generators located within the tunnels to rotate. Tidal energy is produced with special generators used to produce electricity on incoming and outgoing tides.
A tidal lagoon is another form of tidal power plant that generates tidal electricity from the natural rise and fall of the tides.
Tidal lagoons work in a similar way to tidal barrages by capturing a large volume of water behind a man-made structure which is then released to drive turbines and generate electricity.
The size and shape of the lagoon depend on a lot of factors. This includes the tidal range, water depth, environmental impacts, and navigation. All have a big influence on which locations are suitable to build a lagoon.
A tidal lagoon encloses an area of coastline with a high tidal range behind a breakwater.
Dynamic tidal power or also known as DTP is an untried but promising technology for tidal energy generation.
In this tidal power generation, a T shape long dam perpendicular to the coast is constructed. This long T-dam would interfere with coast-parallel tidal wave hydrodynamics. This creates water level differences on opposite sides of the barrier. This drives a series of bi-directional turbines installed in the dam.
A DTP dam is long enough to exert an influence on the horizontal tidal movement. This generates a water head over both sides of the dam. The head can be converted into power, using a long series of conventional low-head turbines installed in the dam.
Tidal power has many advantages compared to other forms of renewable energy sources and some disadvantages also. First, we will see the advantages of tidal energy than the disadvantages of this ocean energy.
According to the estimates of the Indian government, the country has a potential of 8,000 MW of tidal energy. This includes about 7,000 MW in the Gulf of Cambay in Gujarat, 1,200 MW in the Gulf of Kutch, and 100 MW in the Gangetic delta in the Sunderbans region of West Bengal.
But despite the huge potential, India has no policy on tidal energy.
With all the above information, will you think, that tidal power is one form of wave energy? Put your thoughts in the comments.
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