Cars could be the solution to the intermittent nature of wind power if a multimillion European project beginning on a Danish island proves successful.
The project on the holiday island of Bornholm will use the batteries of parked electric cars to store excess energy when the wind blows hard, and then feed electricity back into the grid when the weather is calm.
The concept, known as vehicle-to-grid (V2G) is widely cited among greens as a key step towards a low-carbon future, but has never been demonstrated. Now, the 40,000 inhabitants of Bornholm are being recruited into the experiment. Denmark is already a world leader in wind energy and has schemes to replace 10% of all its vehicles with electric cars, but the goal on the island is to replace all petrol cars.
Currently 20% of the island's electricity comes from wind, even though it has enough turbines installed to meet 40% of its needs. The reason it cannot use the entire capacity is the intermittency of the wind: many turbines are needed to harness sufficient power in breezes, but when gales blow the grid would overload, so some turbines are disconnected.
So the aim of the awkwardly named Electric Vehicles in a Distributed and Integrated Market using Sustainable Energy and Open Networks Project – Edison for short – is to use V2G to allow more turbines to be built and provide up to 50% of the island's supply without making the grid crash.
Each electric vehicle will have battery capacity reserved to store wind power for the island rather than for travelling. This means it acts like a buffer, says Dieter Gantenbein, a researcher at IBM's Zurich Research Laboratory. IBM is developing the software needed for the island's smart grid, and will showcase its work next week. When the cars are plugged in and charging their batteries, they will absorb any additional load the grid cannot cope with and then feed it back to power homes when needed, he says.
"It's never been tried at this scale," says Hermione Crease of Cambridge-based Sentec, which develops smart grid software. There are plenty of smart grid trials already under way, usually involving the use of software to monitor and manage supply and demand, for example, by temporarily switching off industrial cooling units during periods of peak load, she says. But unlike these so-called "negawatt" approaches, proving that cars can be used as part of the grid has yet to attempted.
Andrew Howe of RLTec in London, another smart grid technology firm, says many important questions need answers. It is not clear, for example, how the cost and lifetime of batteries will influence the economics of such a system.
These are the kinds of issue the project seeks to shed light on, says the project manager Jørgen Christensen of the Danish Energy Association, which with technology companies Siemens and Dong and the government are running the scheme.
Source - The Guardian
Showing posts with label low-carbon future. Show all posts
Showing posts with label low-carbon future. Show all posts
Saturday, 20 June 2009
Wednesday, 29 April 2009
UK’s energy shortfall
The government fired the starting gun today for the rebirth of Britain’s nuclear power industry, announcing the names of eleven sites earmarked for construction of new reactors.
Each of the new stations will cost £4.5 billion to build and will be powerful enough to supply as many as 2 million homes with electricity for up to 60 years.
Energy experts warned that the first one would not be ready before 2017 at the earliest — too late to avoid a yawning gap opening up in Britain’s energy supplies with a string of ageing coal and nuclear stations set to close over the next few years.
Ed Miliband, the Energy and Climate Change Secretary, said that the list of new sites — all of which are located at or close to existing nuclear stations and which span the country from West Cumbria to Kent and Somerset — represented “another important step towards a new generation of nuclear power stations”.
“Nuclear power is part of the low-carbon future for Britain. It also has the potential to offer thousands of jobs to the UK and multimillion-pound opportunities to British businesses.”
The public now has one month to respond to the list of sites, including Hinkley Point in Somerset and Sizewell in Suffolk, considered the frontrunners for the first two stations to be built by the French power giant EDF.
Other sites thought to be among the first wave of new reactors include Wylfa in Anglesey; Oldbury in Gloucestershire; and Bradwell in Essex.
The list also includes Dungeness in Kent; Hartlepool in Cleveland; Heysham in Lancashire; and three separate sites in West Cumbria at Sellafield, Braystones and Kirksanton.
Craig Lowrey, head of energy markets at EIC, an independent consultancy, pointed out that the new plants would arrive too late to help Britain avoid a dangerous slide towards an unhealthy dependency on electricity produced from gas-fired power stations.
This was an unwelcome development because of the carbon emissions associated with burning gas and because the UK was running short of its own supplies in the North Sea,forcing it to import more and more of the fuel from countries such as Russia, Algeria and Qatar, Dr Lowrey said.
Britain’s current fleet of power stations — including coal, gas, nuclear, hydroelectric, wind and biomass stations — have a generating capacity of about 83.5 gigawatts. Roughly a quarter of that (22-23 gigawatts) is set to close in the next few years as ageing nuclear plants are retired from service, while a big chunk of coal-fired generation is set to close by 2015 to meet tough new European rules on the use of coal and oil-fired power stations.
The announcement of the nuclear sites also triggered a wave of protest from environmental groups, which argue that the high costs involved and the waste produced by nuclear stations do not justify the contribution they will make in cutting UK carbon emissions.
“We urgently need to end our addiction to fossil fuels, but breathing new life into the failed nuclear experiment is not the answer,” said Robin Webster, energy campaigner for Friends of the Earth. “Nuclear power leaves a deadly legacy of radioactive waste that remains highly dangerous for tens of thousands of years and costs tens of billions of pounds to manage.
Source - The Times
Each of the new stations will cost £4.5 billion to build and will be powerful enough to supply as many as 2 million homes with electricity for up to 60 years.
Energy experts warned that the first one would not be ready before 2017 at the earliest — too late to avoid a yawning gap opening up in Britain’s energy supplies with a string of ageing coal and nuclear stations set to close over the next few years.
Ed Miliband, the Energy and Climate Change Secretary, said that the list of new sites — all of which are located at or close to existing nuclear stations and which span the country from West Cumbria to Kent and Somerset — represented “another important step towards a new generation of nuclear power stations”.
“Nuclear power is part of the low-carbon future for Britain. It also has the potential to offer thousands of jobs to the UK and multimillion-pound opportunities to British businesses.”
The public now has one month to respond to the list of sites, including Hinkley Point in Somerset and Sizewell in Suffolk, considered the frontrunners for the first two stations to be built by the French power giant EDF.
Other sites thought to be among the first wave of new reactors include Wylfa in Anglesey; Oldbury in Gloucestershire; and Bradwell in Essex.
The list also includes Dungeness in Kent; Hartlepool in Cleveland; Heysham in Lancashire; and three separate sites in West Cumbria at Sellafield, Braystones and Kirksanton.
Craig Lowrey, head of energy markets at EIC, an independent consultancy, pointed out that the new plants would arrive too late to help Britain avoid a dangerous slide towards an unhealthy dependency on electricity produced from gas-fired power stations.
This was an unwelcome development because of the carbon emissions associated with burning gas and because the UK was running short of its own supplies in the North Sea,forcing it to import more and more of the fuel from countries such as Russia, Algeria and Qatar, Dr Lowrey said.
Britain’s current fleet of power stations — including coal, gas, nuclear, hydroelectric, wind and biomass stations — have a generating capacity of about 83.5 gigawatts. Roughly a quarter of that (22-23 gigawatts) is set to close in the next few years as ageing nuclear plants are retired from service, while a big chunk of coal-fired generation is set to close by 2015 to meet tough new European rules on the use of coal and oil-fired power stations.
The announcement of the nuclear sites also triggered a wave of protest from environmental groups, which argue that the high costs involved and the waste produced by nuclear stations do not justify the contribution they will make in cutting UK carbon emissions.
“We urgently need to end our addiction to fossil fuels, but breathing new life into the failed nuclear experiment is not the answer,” said Robin Webster, energy campaigner for Friends of the Earth. “Nuclear power leaves a deadly legacy of radioactive waste that remains highly dangerous for tens of thousands of years and costs tens of billions of pounds to manage.
Source - The Times
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