Marine Current Power - Early Experiences

Early Experiences

The possible use of marine currents as an energy resource began to draw attention in the mid-1970s after the first oil crisis. In 1974 several conceptual designs were presented at the MacArthur Workshop on Energy, and in 1976 the British General Electric Co. undertook a partially government-founded study which concluded that Marine Current Power deserved more detailed research. Soon after, the ITD-Group in UK implemented a research program involving a year performance testing of a 3-m hydroDarrieus rotor deployed at Juba on the Nile.

The 1980s saw a number of small research projects to evaluate Marine Current Power systems. The main countries where studies were carried out were the UK, Canada, and Japan. In 1992–1993 the Tidal Stream Energy Review identified specific sites in UK waters with suitable current speed to generate up to 58 TWh/year. It confirmed a total Marine Current Power resource capable theoretically of meeting some 19% of the UK electricity demand.

In 1994–1995 the EU-JOULE CENEX project involved a resource-assessment compilation of a database of European locations in which over 100 sites ranging from 2 to 200 km2of sea-bed area were identified, many with power densities above 10 MW/km2. Both the UK Government and the EU have committed themselves to internationally negotiated agreements designed to combat global warming. In order to comply with such agreements, an increase in large-scale electricity generation from renewable resources will be required. Marine currents have the potential to supply a substantial share of future EU electricity needs. The study of 106 possible sites for tidal turbines in the EU showed a total potential for power generation of about 50 TWh/year. If this resource is to be successfully utilized, the technology required could form the basis of a major new industry to produce clean power for the 21st century.

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