Marine Renewable Technologies
GENTEC venturi     by Andrew H Mackay

Hitherto, the generation of electricity from renewable energy resources has concentrated on "real time generation" : this, in the opinion of the author, is a big mistake. It means that when the tide is flowing or ebbing or when the wind is blowing you get electricity. When it is not - you get nothing! Scotland should start building GENTEC venturi power stations now if we are to meet our energy needs over the next 5, 15, 30 and 45 years, and on into infinity. Using GENTEC venturi Scotland would be self-sufficient in very cheap green electricity and energy in general within 10 years. Exporting surplus electricity would be possible by High Voltage Direct Current (HVDC) ring main from Dounreay, though Orkney, Shetland, Norway, Sweden, Denmark, Germany and back across the English Channel to complete the loop. [ full article ]


Causerie 20

Marine Renewable Technologies

Blyth, Nescastle 2003: The air and sea that the oil rigs stand in are of immensly greater value than what they extract from the sea bed. And it can also be measured in $ and £ and Euros. We are into the second generation of commercial wind turbines, wave power is at the prototype stage with small units already supplying the grid, and new tidal generators which don't require large causeway schemes are under evaluation.


You can ask the engineers: supply x megawatts from location y to node z, and they will give unit and capital costs which, all the time, improve on traditional generating methods. The ethical use of fossil fuels becomes to fill the gaps in the supply of renewables. How do we use the power? Though giant multinational energy companies will dominate the offshore engineering business, the nature and distribution networks for wind, wave, tidal, and solar, create opportunities for far cleaner, more efficient and locally run industries. I've posted links to some of Britain's leading edge energy company websites, where you can learn more about the capabilities of the new technologies. Since Autumn 2000 the vast majority of power sales are being conducted through bilateral contracts between suppliers and generators. These contracts will attempt to match each packet of demand with an equivalent amount of generation, on a half-hourly basis. In theory, there will be no pooling of power. Generators and suppliers who are party to these contracts will notify the system operator of their generation intentions and demand requirements. If a generator's actual output does not match the contract position, charges will be applied to any shortfall or excess electricity.

What is termed market forces is, in effect, an interlocking cartel of company directors whose goal is to maximise short and medium term profits. Although grid control systems have been upgraded for greater efficiency, a consequence of the present regulatory system is likely insufficient investment in renewables before the future rising price of fossil fuels.

 MAREC 2001

2-day international conference on Marine Renewable Energies

was organised by

Institute of Marine Englineers

and the
 University of Newcastle

There will be more Features on Wave and Tidal Power in the November Issue of HjfS

 Blyth Offshore Wind Farm | Novar Wind Farm | Econnect [Grid Connections, Mini-grids]
 Proposal for a large vertical-axis tidal-stream generator with ring-cam hydraulics
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