Ed Miliband’s planned expansion of offshore wind alone amounts to nine million tonnes of industrial equipment and concrete added to the sea. The sheer immensity of ‘green’ industrialisation is coming as a shock to many, says John Constable in the Spectator.
The low energy density of wind and sun means that extremely large collection devices are needed – enormous wind turbines with large blades, vast areas of solar panels. It is necessarily a capital-intensive and very expensive system.
A concrete example will make this clear. The 1,400 Megawatts (MW) Sophia Offshore Wind Farm on the Dogger Bank is currently under construction and will cover an area of nearly 600 square kilometres (it would just about fit into Middlesex). It is one of many major wind installations that the Government is intending to drive through in its ambition to quadruple offshore capacity. We currently produce about 15 Gigawatts (GW) of operational offshore wind power. To meet this quadrupling of capacity, we would need around 30 more Sophia Offshore wind farms.
The Sophia will use the Siemens Gamesa SG 14-222 DD, one of the largest wind turbines on the market, with a generating capacity of 14 MW. It has three blades 108m in length, each weighing 65 tonnes. The nacelle, the box containing the generator at the top of the tower, weighs 500 tonnes, which Siemens proudly describes as a lightweight machine. Compared to other brands, this may even be true.
The overall height of the turbine is 252m, only 60m short of Britain’s tallest building, the Shard. It foundations will, according to Sophia’s own publicity, be 80 to 90m in length and weigh 1,200 to 1,400 tonnes each. The total weight of each turbine – blades, nacelle, tower and foundations – is likely to be nudging towards 3,000 tonnes.
Sofia will use 100 of these structures, so we can estimate that the wind farm alone accounts for about 300,000 tonnes of industrial equipment, mostly steel, some concrete, and fibre-glass reinforced epoxy in the blades. (For reference, a Queen Elizabeth class aircraft carrier weighs a mere 65,000 tonnes.) And this is before we have taken into account the offshore substations and the cables connecting each turbine and the shoreline.
Multiply all this by 30 to meet the Government’s offshore wind targets, and you arrive at nine million tons of industrial equipment for the additional offshore installations alone. For scale, recall that the U.K.’s total annual production of steel is only six million tons, and you can begin to appreciate the magnitude of Ed Miliband’s plans for the country. This Wind and Sun King makes Louis XIV look humble.
Worth reading in full.
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