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Tag Archives: energy storage

Storage will cut renewable balancing cost

By Dave Elliott

Energy storage is all the rage at the moment, with a Daily Telegraph columnist even claiming that ‘cutting-edge research into cheap and clean forms of electricity storage is moving so fast that we may never again need to build 20th Century power plants in this country, let alone a nuclear white elephant such as Hinkley Point’.

And it could be cheap. The recent Carbon Trust/Imperial College report on energy storage says that ‘the UK can realise significant cost savings if market arrangements for the electricity system allow for an efficient deployment and use of energy storage, alongside other flexibility options such as demand response and interconnectors’. It claims that many of the changes needed ‘are likely to be cost neutral and require no additional funding from the government’.

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US gets to grips with renewables

By Dave Elliott

The US currently gets about 17% of its electricity from renewables, including hydro, and its potential for rapid expansion is huge. A new study from NOAA, the US National Oceanic and Atmospheric Administration, says that a ‘US transition to a reliable, low-carbon, electrical generation and transmission system can be accomplished with commercially available technology and within 15 years’, according to Alexander MacDonald, one of the lead authors of the report, which was published in Nature Climate Change. But it would need supergrid  ‘electron superhighways’ to transmit electricity across the country.

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PV solar: big isn’t always better

By Dave Elliott

PV solar is now big – with 227GW installed around the world. But large solar farms apart,  much of it is in small roof-top units. Would bigger arrays be better? Certainly economies of scale suggest large-scale projects are generally more cost-effective than small ones. That holds up well for wind, but does it also hold for PV solar?

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Why not nuclear and renewables?

By Dave Elliott

Nuclear plants do not generate carbon dioxide, so why can’t we have nuclear AND renewables, supporting each other, as a response to climate change? In evidence to the Energy and Climate Change Select Committee in July Amber Rudd MP, DECC Secretary of State, suggested that despite its high cost nuclear baseload ‘enables us to support more renewables’ and was needed since, ‘as we all know, until we get storage right, renewables are unreliable’. Can nuclear really support renewables, and is it really low carbon?

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A new UK green energy transmission and storage vector

By Dave Elliott

This helpful paper from a team at Sheffield University, UK, entitled ‘Great Britain’s Energy Vectors and Transmission Level Energy Storage’, suggests that ‘power to gas’ conversion systems could supply synthetic gas (syngas), made using renewable electricity, for storage in the gas pipe network, so as to balance variable renewables, this  being a substantially larger storage option for the UK than pumped hydro.

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Filling the GAP

By Dave Elliott

A group of UK notables, including Sir David King, Lord John Browne, Lord Nicholas Stern and Lord Martin Ryle, has launched a proposal for a 10 year Global Apollo Programme of science-led research and development (R&D) to develop clean energy technology fast to combat climate change. One of the other proposers, former Cabinet Secretary Lord O’Donnell, told BBC News: ‘People never believed we could put a man on the Moon – but we did. People don’t believe we can solve climate change – but we have no choice.’ (more…)

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Energy storage – new views, Part 2

By Dave Elliott

In addition to its large-scale grid balancing role, which I looked at in my last post, energy storage may also play a role at the consumer level, with batteries allowing solar PV-using ‘prosumers’ to provide their own backup. Some see this as a possible new type of distributed storage capacity and also, more radically, as further challenging the market power of the big utilities (much of the 75GW of wind and PV in Germany is now owned by local consumers and energy co-ops), even to the point when grid systems are redundant. This may be overstated, but some more movement in that direction may be occurring in Germany and the US as batteries get cheaper.   (more…)

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Energy storage – new ideas Part 1

By Dave Elliott

Energy storage is usually seen as a very good idea – it would help cope with variable renewables. Indeed some enthusiasts now even say that cheap battery storage will make PV solar so viable at the domestic level we may not need grid power!  Or even grids!  That seems unlikely – they help to balance variable demand  with  supply  from a range of sources near and far. But one thing is clear – energy storage, large and small scale, is becoming a big issue, with many new ideas emerging.    (more…)

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Balancing variable renewables

By Dave Elliott

There is now a range of books looking at the technical and policy options available for managing the use of variable energy resources such as wind and solar energy. The pioneering text in this area was Earthscan’s “Renewable Electricity and the Grid” from 2007, edited by Godfrey Boyle , with contributions from many of the UK top experts. But the field has since expanded with, for example, a lot of new work being done in the US. (more…)

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Vehicle to grid balancing

By Dave Elliott

The vehicle to grid (V2G) debate continues, offering a way to balance variable renewables and also demand peaks, by using the batteries of electric vehicles, linked to the grid when parked at home, to store excess power during low demand periods, ready to export when demand is high and renewables low. It sounds a clever idea but in addition to economic issues (e.g. the extra costs of the home-based power uploading system) it opens up some interesting logistical issues. (more…)

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