The seas and oceans carry a great potential of energy which can be harnessed and transformed into electricity. Converting the sea and oceans kinetic energy is one of the best options for the future production of renewable energy. Many important populations of the world live near the sea and could benefit directly from this tremendous source of energy.
Marine energy refers to all forms of renewable energy which can be harnessed from sea and ocean like waves, tidal, salinity and temperature difference in water.
The two main sources of marine energy used to generate electricity is the ocean natural movement the energy of waves and tidal energy.
Wave energy or wave power is created by wind blowing over the sea surface, forming waves. This motion is acting as a carrier of the kinetic energy of the waves. There are various methods and concepts under development to extract and convert the energy of waves into electricity. Wave energy systems can be located offshore (at deep water sites) or near the shore or shoreline and may be either bottom-mounted or floating.
The first experimental wave farm was installed in 2008 in Portugal at the Agucadoura Wave Park using Pelamis machines.
An offshore wave energy collector developed by Pelamis Wave Power Company from Scotland, UK. This method uses a floating tube called "Pelamis".
Tidal energy or tidal power is kinetic energy that results from the large movements of water body from the surface of the sea to the seabed, caused by the gravitational pull of the sun and the moon. Water is periodically raised and lowered (flow and ebb) and this great potential of energy can be exploited for electricity generation. Due to this periodical motion, tidal power is more predictable than other forms of renewable energy. A tidal power generation system can be very costly and is limited to the number of available sites with high tidal ranges. Recent developments in design of turbine technology can increase the application of tidal power generation and can reduce costs and its affect on the environment.
Tidal GeneratorMethods of generating electricity using tidal energy;
Tidal stream generators is a devise that extract the kinetic energy of tides and converts them in electricity, this device is called as tidal energy convertor(TEC). Tidal stream generator works almost on the same principle as a wind turbine does and it may look quite similar. This extracts energy from tides in the same way as wind turbine extract energy from wind and has less ecologically impact on the environment than other method of extracting tidal energy. The potential of power generation using tidal stream turbine can be greater than that of similarly rated wind turbine.
Tidal barrage is a method used to capture the energy from the rise and fall of the tide in estuaries, lagoons and bays, these are referred to as tidal impoundment. As the water flows in and out of the impoundment, turbines are placed there to capture the energy from the tidal cycle.
A tidal barrage is one of the oldest methods of tidal power generation. The first large scale tidal power plant using a barrage was built in France, the Rance Tidal Power Station, it became operational in 1966 and has an annual output of approximately 600 GWh.
Here are our links to;
Wave and Tidal Power Equipment Suppliers
Wave and Tidal Power Scheme Operators
Wave and Tidal Power System Designer and Consultants
Local, National and EU grants, funds and financial support are available for domestic, community and commercial Renewable Energy projects. See Information Service Category on the left hand side of the page.