Dynamic tidal energy

Dynamic tidal energy

In the world we live in today, power generation is very necessary, so we can count on different sources of energy. However, humans are massively developing a few limited resources that can be utilized through the use of non-renewable resources. This is partly due to poor knowledge of the best possibilities for generating other types of energy and a lack of investment in the technologies necessary for progress. We are talking about renewable energies. One of them is the dynamic tidal energy.

In this article we are going to tell you everything you need to know about the characteristics and importance of dynamic tidal energy.

Energy paradigm

characteristics of dynamic tidal energy

Oil is currently the main source of energy and we can use it to make fuels and compounds useful for daily life. However, it has a serious disadvantage: it is a non-renewable resource. It is obtained from very old organic sediments, where plant and animal species lived thousands of years ago or more. For this reason, the use of renewable energy is gaining great attention among renowned scientists, engineers and companies.

Renewable energy is energy obtained from resources that can be easily reused and are not depleted due to continuous development. There are a variety of these types of resources in the world that can produce cleaner energy without worrying about polluting waste or high costs.

An interesting option is tidal power, which can be achieved by using the movement of the tides to generate electricity in a safe and renewable way. Like any other energy, it requires a specific type of technology and one of the methods to obtain it.

Seawater energy

renewable technology

By not consuming fossil elements or generating gases that contribute to the greenhouse effect, it is considered a clean and renewable energy source. Its advantages include a predictable and safe supply along with a potential that does not change significantly from year to year, but only in the cycles of tides and currents.

The installation of this type of energy is carried out in deep rivers, mouths, estuaries and into the sea using ocean currents. The participants in this effect are the sun, the moon and the earth. The moon is the most important in this action because it is the one that generates the attraction. The moon and the earth exert a force that attracts objects towards them: this gravity causes the moon and the earth to attract each other and hold them together.

Since the closer the mass is, the greater the gravitational force, the pull of the moon towards the earth is stronger in the closest area than in the farthest area. The uneven pull of the moon on the earth is the cause of ocean tides. Since the earth is solid, the attraction of the moon has a greater influence on water than on continents, so the water will change significantly depending on the proximity of the moon.

There are 3 methods of tidal power generation. We are going to explain the first two above and focus on one of them in depth.

Dynamic tidal energy

dams to generate energy

These are the first two forms of tidal power generation:

  • Tidal current generator: Tidal current generators use the kinetic energy of flowing water to drive turbines, similar to the wind (flowing air) used by wind turbines. Compared to tidal dams, this method is less expensive and has less ecological impact, which is why it is becoming increasingly popular.
  • Tidal dam: Tidal dams use the potential energy that exists in the difference in height (or head loss) between high tide and low tide. The dam is essentially a dam on the other side of the estuary, affected by the high cost of civil infrastructure, the scarcity of available sites around the world, and environmental problems.

And now we are going to describe the form of generation through dynamic tidal energy. It is a theoretical generation technology that uses the interaction between kinetic energy and potential energy in tidal currents. It is proposed to build very long dams (for example, 30 to 50 kilometers long) from the coast to the sea or ocean, without delimiting an area. The dam introduces a tidal phase difference, causing significant water level differences (at least 2-3 meters) along shallow rivers where the tides oscillate parallel to the coast, such as those found in the United Kingdom, China and South Korea. The power generation capacity of each dam is between 6 and 17 GW.

Advantages and disadvantages of dynamic tidal energy

The advantage of this energy is that there is no consumable raw material at all, as the tide is infinite and inexhaustible for humans. This makes tidal energy inexhaustible and renewable economic energy.  On the other hand, it does not produce chemical or toxic by-products, and its elimination does not require an extra effort, like the radioactive plutonium produced by nuclear energy or the greenhouse gas released by the burning of fossil hydrocarbons.

The main disadvantage of this form of energy is low efficiency. Under ideal circumstances it can power hundreds of thousands of homes. However, the huge investment has a very negative impact on the landscape and the environment because the marine ecosystem must intervene directly. This makes the relationship between the cost of the manufacturing plant, the ecological damage and the amount of available energy not very profitable.

Tidal energy is used as a source of electricity for small towns or industrial facilities. This electricity can be used to illuminate, heat or activate various mechanisms. I also have to bear in mind that not all places in the world of tides have the same force.

I hope that with this information you can learn more about dynamic tidal energy and its characteristics.


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