7 Tidal energy

 Tidal energy is a form of power produced by the natural rise and fall of tides caused by the gravitational interaction between Earth, the sun, and the moon. 

Tidal currents with sufficient energy for harvesting occur when water passes through a constriction, causing the water to move faster. 

Using specially engineered generators in suitable locations, tidal energy can be converted into useful forms of power, including electricity. 

Other forms of energy can also be generated from the ocean, including waves, persistent ocean currents, and the differences in temperature and salinity in seawater.

How does tidal energy work?

In simple terms, a tidal energy works via a turbine works like a wind turbine, with blades rotating 12-to-18 times a minute depending on tide strength. 

The turbine is connected to a gearbox that turns a generator, creating electricity.

Suitable locations for capturing tidal energy include those with large differences in tidal range, which is the difference between high tide and low tides, and where tidal channels and waterways become smaller and tidal currents become stronger.

Tidal energy importance and applications

Tidal energy represents a significant opportunity to increase the world’s renewable power generation capacity. 

As countries continue to develop, and the global population and its reliance on energy grows, so does the demand on power systems to provide additional clean energy resources. 

Tidal energy could potentially supply a significant percentage of future electricity needs if barriers, including robustness of devices, environmental challenges, and the cost-effectiveness of its commercial application, can be successfully navigated. 

Advantages of Tidal Energy

Environment-friendly

A highly predictable energy source

High energy density

Operational and maintenance costs are low

An inexhaustible source of energy

Disadvantages of tidal energy

High tidal power plant construction costs

Negative influence on marine life forms

Location limits

The variable intensity of sea waves