Two-thirds of our planet is composed of water, with immense oceans and seas exhibiting extraordinary force. Given this vast potential, it is imperative to harness the sea’s power to produce renewable energy, akin to solar and wind energy. Tidal energy, though not yet widely adopted, is derived from the movement of water caused by tidal forces. Typically, waves and tides drive turbines connected to alternators, initiating energy generation through this natural force. This energy is collected in tidal power plants, which then distribute it.
Similar to other forms of energy that utilize natural properties, tidal energy is entirely renewable. It leverages the natural circulation of water, ensuring its sustainable exploitation. The movement of tides, driven by the gravitational pull of the sun and the moon, guarantees a perpetual energy source.
Tidal energy is a clean form of energy production, generating no toxic, harmful, or polluting byproducts. It is considered a green energy source as it does not produce emissions that negatively impact the environment. Consequently, it helps reduce the amount of carbon dioxide released into the atmosphere.
Economically, tidal energy is advantageous, with the potential to supply electricity efficiently to coastal cities. The cost per kilowatt-hour of tidal energy is lower compared to other energy sources.
Moreover, tidal energy is highly predictable. Understanding tidal cycles allows for the efficient scheduling of energy production systems, ensuring consistent electricity generation that meets demand.
Despite its benefits, tidal energy faces challenges, such as the high initial construction costs of tidal power installations.
Approximately 150 tidal energy plants are operational worldwide, with Europe hosting the majority. The United Kingdom leads with 90 plants. These plants vary in design and innovation, utilizing current generators via turbines, tidal barrages with dams, or hybrid technologies.
The world’s largest tidal energy plant, MeyGen, is located 2 km from the northwestern tip of Scotland. This site was chosen due to a natural channel formed between a nearby uninhabited island and the mainland, accelerating the flow of water between the North Sea and the Atlantic Ocean.
Since its inception in 2018, MeyGen has contributed 24.7 GWh of renewable electricity to the UK’s national grid. In 2019 alone, it supplied 13.8 GWh, equivalent to the average annual consumption of approximately 3,800 UK households.
SAE Renewables Limited (LON:SAE) was founded in 2005 as a supplier of tidal stream turbines, SAE quickly grew to include development of tidal stream projects and is the majority owner of MeyGen, the world’s largest tidal stream energy project.
