Sea waves carry large amounts of energy. If only part of this energy were to be captured, it could provide a good proportion of the energy needs of countries like the UK, where there is a energetic wave climate off the coast.
Tidal range devices exploit the potential energy stored in the raising and lowering of sea levels within an enclosed area during inter-tidal periods.
Tidal Stream devices make use of the kinetic energy of moving water much in the same way as a wind turbine would in air.
In the UK, most large hydro power sites are already exploited, but there are many smaller sites where small-scale plant could be introduced.
Hydro power is a mature and proven technology that helped shape the landscape of North-West England and is now used internationally as a case study for the development of Energy Modelling methodology.
Devices that transfer energy between a fluid system and a mechanical system are called Fluid Machines or Turbomachines. For example, the centrifugal pump continuous to be the workhorse of the oil, gas, petrochemical, utilities, power, nuclear, chemical and process industries worldwide, and hydro-power turbines produce one fifth of the entire world's electricity.
Wind power, as an alternative to burning fossil fuels, is plentiful, renewable, widely distributed, clean, produces no greenhouse gas emissions during operation, and uses little land.