To protect the environment for future generations it is vital that we move rapidly to a more sustainable lifestyle, reducing carbon emissions of greenhouse gases and consumption of limited resources.
Offshore wave energy has the potential to be one of the most environmentally benign forms of electricity generation with a minimal visual impact from the shore.
What is wave energy ?
Wave energy is essentially stored, concentrated wind energy, the waves being created by the progressive transfer of energy from the wind as it blows over the surface of the water.
Wave energy could play a major part in the world’s efforts to combat climate change, potentially displacing 1 – 2 billion tonnes of CO2 per annum from conventional fossil fuel generating sources.
Such installations would also provide many employment opportunities in construction, operations and maintenance.
What is a Pelamis ?
The Pelamis Wave Energy Converter is a revolutionary concept.
It is actually the name of a surface swimming snake, which is quite an apt description for the machine.
Its developed by a Scottish company, Pelamis wave power limited founded in year 1998 by Dr.Richard Yemm , Dr.Dave Pizer and Dr.Chris Retzler.
These are massive,red,steel tubes look like rounded trains cars used to generate electricity from sea waves.
Current production machines are 180m long and 4m in diameter with 4 power conversion modules per machine . Each machine is rated at 750kW.
Pelamis wave energy converter
The machine is semi-submerged, articulated structure composed of cylindrical sections linked by hinged joints. The wave-induced motion of these joints is resisted by hydraulic rams, which pump high-pressure fluid through hydraulic motors via smoothing accumulators.
The hydraulic motors drive electrical generators to produce electricity. Power from all the joints is fed down a single umbilical cable to a junction on the sea bed. Several devices can be connected. Together and linked to the shore through a single seabed cable.[/justify]