• When complete, the 1.7 billion project in the Thames Estuary will boast 217 turbines
  • It will be able to generate enough electricity for 750,000 homes
  • Set to be connected to the National Grid next spring

By Chris Richards

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When fully operational, it will be the world's largest offshore wind farm - and, as these pictures show, work on the project in the Thames Estuary is moving along at quite a pace.

The wind farm, which is being built in the shallow waters 12 miles off the coasts of Kent and Essex, which, when complete will feature 217 turbines that will be able to supply enough electricity to power a quarter of London's homes.

The 1.7 billion wind farm, known as the London Array, is owned by the utility companies E.ON, Dong Energy and Masdar and is expected to start sending energy to the National Grid next spring.

The first phase of the project will generate 630 megawatts of power - equivalent to a small gas or coal fired power station and enough to supply 470,000 homes.

Corridors of power: When complete, the London Array wind farm will be the largest in the world

Corridors of power: When complete, the London Array wind farm will be the largest in the world

Vast: The 1.7 billion London Array wind farm will feature 217 turbines when complete

Vast: The 1.7 billion London Array wind farm will feature 217 turbines when complete

The second phase will bring the total to 217 turbines, each towering 147 metres above the estuary, giving 1000 mw of power, enough for 750,000 homes.

Work on the project began in January.

It was originally given the go-ahead in May 2009.

At present, the world's largest offshore wind farm is the 102-turbine Walney project, located off the coast of Cumbria.

The Walney project is capable of providing sufficient electricity for about 320,000 homes.

Work in progress: Construction work takes place on one of the wind turbines in the Thames Estuary

Work in progress: Construction work takes place on one of the wind turbines in the Thames Estuary

Estuarine energy: The turbines, in the Thames Estuary, will eventually be able to generate enough electricity for 750,000 homes

Estuarine energy: The turbines, in the Thames Estuary, will eventually be able to generate enough electricity for 750,000 homes

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217 turbines that will be able to supply enough electricity to power a quarter of London's homes.....Will they? Will they really?

'World's largest wind farm' with 217 turbines that can power homes for 750,000 homes takes shape off the coast of Essex................................................When the wind blows.....................................Meanwhile we will have to build a nuclear power station as backup...................................Still it keeps the Germans in work.

So far wind turbines don't get anywhere near their rated capacity. I think the 30% someone quoted is generous. Either too little or too much wind is no good. The puffed up figures for output and homes etc are just ridiculous "spin" As to offshore, any marine engineer or ship/boat owner knows how corrosive and challenging the sea environment is. Likely that maintenace costs will soar and availability plummet. Off vertical by even 2 degrees or so stops them and seabed scour is likely to be a problem - experience will reveal. Net effect: massive costs, calls for more subsidies from YOU, the electricity consumer, and not a great deal of contribution to UK generation, or CO2 reduction targets (not that I care about that!!), remembering the standby plant, some of it hot and spinning, that the presence of wind turbines on the grid demands (else the lights go out!)

Power for 750,000 homes? What I want to know is: how did they calculate that? Does it include electric heating, cooking, hot water?

These 750.000 homes will be powered partime (less than 50%) at unpredictable times. Reliable generating plants have to stand by and powered up and down to keep these homes on power. The inevitable efficieny loss is about the same as the input of the windmills. It all a terrible waste of your taxmoney to no avail.

William Thomson , United Kingdom, 17/6/2012 18:21...........don't forget the royal family "own" the seabed and will receive M for this.....................and you and me r paying for it all makes you proud to be British

It will be able to generate enough electricity for 750,000 homes BUT, only if its very windy, what happens on days with not enough wind ??????

Can power 750 000 homes, if the wind is at just the right speed and direction. However, still air or too much and can power exactly zero homes. In the meantime large steam (Nuclear or conventional) power stations have to keep their turbines running ready to cover as it takes days to warm them through and power up and cooling down/heating up cycles of the boilers does massive damage. All in all as expensive a way of generating power as any, maybe even costs more. But who listens to Engineers when there are Politicians and Business men about looking for quick and massive bucks?

Bev, it is worse than that it is 1.7 BILLION.

And what are the subsidy costs, the maintenance costs, the scrapping costs.

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