Until you’ve been to an offshore wind farm, it is hard to conceive of either its grace or majesty; the sheer scale of the project – over a hundred turbines turning simultaneously. Beyond the aesthetic beauty, there is also the silence. The wind farm was a marvel of almost noiseless efficiency. On a fortunately bright and not too breezy recent morning, your author was lucky enough to take a boat trip to Rampion, a wind farm located about 13km off the south coast of England in the English Channel.
It took around 40 minutes to reach Rampion. The 70 square kilometre site contains 116 wind turbine generators. Each stands at a height of 140m from base to blade tip. For context, London’s Big Ben is 96m high. The length of each blade is 55m, with a diameter of 112m. When fully operational, the wind farm is capable of powering around 300,000 homes.
To build such a project is a non-trivial undertaking. We were told that the construction took around three years. Each turbine weighs 250 tonnes and is supported by a foundation sunk over 60m deep and around three times the turbine’s weight. Beyond the turbines, there is also an interconnector station at Rampion that converts the turbine’s energy into the appropriate current to be fed back into the grid. Miles of sub-sea cables (144km, to be precise) link the turbines together.
Expect to see more projects such as Rampion appear both in the UK and elsewhere. Locals love them since the turbines are located far from where they live (and hence not in their backyard). Fishing stocks have also apparently improved in the Rampion area since the turbines were erected – their foundations provide shelter and fertile breeding grounds. More fundamentally, offshore wind farms are more efficient, have a reduced environmental impact and can be scaled more quickly, owing to the available space in which to build them. They typically require fewer turbines to produce the same amount of energy as onshore wind farms. Against this background, most industry forecasts call for offshore wind turbine market growth at a pace some four times the rate of onshore. The future is offshore. We will be publishing more on this topic, in a dedicated theme piece after the summer.
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Originally Posted July 27, 2023 – Turbine-tastic
The above does not constitute investment advice and is the sole opinion of the author at the time of publication. Past performance is no guide to future performance and the value of investments and income from them can fall as well as rise.
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