Renewable Energy

Tidal Power💧💦

What is non-renewable and renewable energy?

Renewable energy is a resource that will never run out. Some examples of renewable energy resources are wind energy, solar energy, geothermal energy and more.

Non-renewable energy is a resource that will run out or is limited. Some examples of non-renewable energy are fossil fuels, coal, nuclear power. This is all about tidal energy!

Tidal energy

What is tidal energy?

Tidal energy is a renewable energy source. Tidal energy harnesses kinetic energy from the up and down movements of the waves. The waves are caused by wind action. Wind action is caused by the sun heating the waters surface generating air pressure! That is how tidal energy works.

The 3 machines

There are 3 known machines, the point absorber, the attenuator, and the oscillating wave surge converter. The point absorber is is a floating structure that moves up, down and in all directions. There are conversion mechanisms inside it. Conversion mechanisms are machines in the point absorber that converts water into power/electricity. The power is converted into electricity and stored at the base/bottom. The attenuator works by a movement of 2 wings type machines on the side, that flap up and down like wings. The up and down movement of the "wings" is caused by the pounding of the waves. The movement makes kinetic energy. It is then converted into power/electricity and stored away in the bottom of the attenuator. The oscillating wave surge converter extracts kinetic energy from waves. It is installed bellow waters surface.

What types of energy...?

The ocean can produce 2 types of different energy. It can produce thermal energy from the suns heat or mechanical energy from the tides. Oceans cover 70% of earths surface. That makes tidal energy the worlds largest solar collectors.

The sun does a lot

The sun is a big part of this process of making electricity. The suns heat warms the surface of the water a lot more than the deep ocean water and that temperature difference creates thermal energy. Ocean thermal energy is used for many applications and electricity generations. Fact: just a small portion of the heat trapped in the ocean could power the world!

Conversion systems

There are 3 electricity conversion systems like open-cycle, closed-cycle, and hybrid. Open-cycle boils the seawater, operating at low pressure. It produces steam that passes through a turbine or generator. Closed-cycle uses oceans warm surface water to vaporize a working fluid. The vapour then expands to turn a turbine. The turbine activates a generator to produce energy/electricity. Hybid combines open and closed cycles together to make even more energy.


The disadvantages to tidal energy are that if the waves or tides are too strong, they could cause a lot of structural damage to the machines. It could also cause overload operation problems, and lack of data or Information. Another disadvantage is many governments and bisnesses are less encoreged to start to use marine energy because of those other disadvantages. Tidal energy is also a environmental concern because marine energy facilities may effect wave hydrodynamics which create artificial habitats, concerns with marine animals, lots of noise and so on. Those are some disadvantages to marine energy!


The advantages to marine and tidal energy is it's renewable. Tidal energy works as long as there is sun and moon, because if there is sun and moon there are waves,if there are waves there is tidal energy. Also tidal energy belongs to the most efficient energy sources by having efficiency of approximately 80%. This is much better efficiency than other energy sources such as solar or wind energy. Tidal energy also has a positive impact on climate change. That is some advantages of tidal energy!

Yay, Horray, Tidal energy!

That was my report on tidal energy :)!!!!!!!!!!

Some websites I used: