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Sunday, May 27, 2012

Tidal energy its advantages and disadvantages;

Tidal Energy, Gravitational, Types Kinetic & Potential, Advantages & disadvantages of its producing;

What are the advantages of tidal energy?

What is tidal energy?

Tidal Energy is one of the many types of renewable energy, such as solar, wind, geothermal and biomass energy disposed by the nature, and can be exploited for human energy’s needs. Tidal produces clean and alternative energy that will not release pollutants into the environment, and also will never run out of source.

Gravitational energy

Tidal energy is derived from the movement of waves or tides due to the gravitational attraction of the Earth and the Moon, so it is a utilization of the variations in sea level caused by the gravitation effects of the moon combined with the rotation of the earth. This gravitational energy can be used to generate work or to generate electricity. In spite of that tidal energy is still an immature technology, but nowadays it is more predictable energy than before or than many others.

Two types of tidal energy

Tides contain energy that can be harnessed to produce electricity. There are two kinds of tidal energy that can be extracted. They are kinetic energy and potential energy.

Kinetic energy

Motional energy, which can be harnessed from the surging and ebbing tides to produce electricity.

Potential energy

Differential energy that can be harnessed from differences between the high and low tides. The tidal currents are the primary method of generating electricity.

Tidal Plants

There are many plant types of tidal energy, but it is possible to distinguish three main types.

The first one is

Tidal fences that block channels, forcing water to go through them and turning their turbines to generate electricity.

The second is

Tidal Barrages, the most common type of tidal plants, a dam or barrage is installed where there are narrow water channels with gates and turbines at certain points, as water flows through the turbines; they turn a generator that produces electricity.

The third is

Tidal Turbines, this type works like underwater wind turbines, using the tides to turn blades and generate electricity. 

The most common plant

The Barrage type, that works in three main steps. The first step is that the Barrage acts like a dam holding water back to be released later; and the second step is that the sluice gates allow water to flow through the turbines; the third step is that the turbines spin as the water flow through them, which in turn rotate an electricity producing generator.   

The advantages of tidal energy

Producing tidal energy does not generate emissions or wastes to pollute environment, generating energy from abundant and cheap predictable fuel sources of water, and may protect coastline against damage from high storm tides, and providing a ready made road bridge. 

The disadvantages of producing tidal energy

Expensive construction, barrages may block outlets to open water, barrages affect fish migration, many fish swimming up to the barrages maybe killed, barrages can affect the tidal level that may influence the local navigation.
basic development!

Big luck