Argument for offshore windfarms – UK

Offshore Windfarm

Just read compelling article by George Monbiot in the Guardian advocating the use of the UK’s offshore wind resources. Apparently the UK could become a net exporter of electricity by 2050 based on the potential for offshore wind generation and their expected energy consumption. Generation from offshore wind turbines has many benefits over onshore generation and avoids many of the pitfalls that stimy planned projects, most notably the NIMBY effect.

The points made in favour are:

  1. Taking into account constraints on offshore renewables such as water depths, shipping lanes and other obstacles there is practical potential for 2,130 terawatt hours per year – 6 times the UK’s current electricity demand.
  2. Utilising only 29% of this potential resource the UK could become a net electricity exporter.
  3. Utilising 76% of this potential resource the UK could become a net energy exporter (i.e. net of all electricity, oil and gas consumption).
  4. 145,000 people would be employed.
  5. Annual revenue of £62bn.
  6. The UK’s looming energy gap could be closed without resorting to any further use of fossil fuels.
  7. The public hostility to onshore windfarms would be avoided as the best offshore wind resource is far offshore where the turbines can’t be seen.
  8. Potential to create marine reserves around the turbines.
  9. Basically zero potential for habitat destruction unlike tidal barrages.

The major constraint at present is the capacity of the national grid to accommodate variable renewables. For the above benefits to apply the grid needs 34 gigawatts of backup capacity, energy storage, and interconnections with the continent via the proposed renewables supergrid. Given that this supergrid already has a measure of political approval and some very strong backers from the likes of Germany, the Netherlands, Norway and Denmark it is reasonably safe to assume that it will happen, so the UK should push ahead and become the leaders in offshore wind. This combined with the a renewables supergrid acting as a giant battery for Europe’s clean energy would make Eneropa a reality.

The construction effort required to make the UK a net energy exporter would be roughly equivalent to building the North Sea oil and gas infrastructure all over again, an enormous undertaking and no doubt a point that the sceptics will seize upon. But the fact is, if something so large was built before then it is completely plausible that it could be built again, only this time it would be clean, efficient, and future-proof. All that is needed is the political will to push it through and maybe even that is possible now with a fresh, inspired new government…

Source: http://www.guardian.co.uk/environment/georgemonbiot/2010/may/20/offshore-renewables-pirc-report

Additional source: http://www.guardian.co.uk/environment/2010/may/19/offshore-green-energy-uk

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