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Tag Archives: 100% renewables

100% renewables – yet more studies

By Dave Elliott

It’s hard to keep up with the spate of studies suggesting that it would be technically possible to get to near 100% of electricity, or even of all energy, met from renewables by around 2050 at reasonable costs. With the broad options and potentials now quite well mapped out by academic and NGO studies covering many countries and regions, and also the world as a whole, the latest batch of studies focuses on the issues that would be raised on the way to that.

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Non-nuclear UK energy futures

By Dave Elliott

Several non-nuclear energy scenarios for the UK have been produced recently, as I have reported in an earlier post, some of them in response to the perceived need for a ‘Plan B’, as an alternative to the Hinkley EPR project. Some new ones include a submission to the government by TASC, the Together Against Sizewell C campaign group, and a study by developer Green Hedge. They may have lost the first battle, with Hinkley going ahead, but their analysis remains relevant for whatever happens next e.g. in relation to the next projects, which include another EDF EPR at Sizewell. (more…)

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Rural and urban energy conflicts

by Dave Elliott

In my last post, I looked at how cities would have to rely in part on imported green power, given their spatial constraints and high energy use, if they want to be fully sustainable. That may worry some environmentalists. It also has social implications for cities and for rural areas, and their interactions, as I will explore in this post. (more…)

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Renewables continue to boom globally

By Dave Elliott

BP says renewables have shown ‘a quicker pace of penetration than any other fuel source in modern history’, and their strong growth meant that they ‘accounted for all of the increase in global power generation in 2015’. BP’s latest review of world energy trends carbon notes that wind power capacity grew by 17.4% and solar by 32.6% last year, with China overtaking Germany and the US as the largest solar generator: www.bp.com/en/global/corporate/energy-economics/statistical-review-of-world-energy.html  REN21 has come up with equally high figures. And looking to the future, both see renewables booming, as does Bloomberg.

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Our Renewable Future – some US views

By Dave Elliott

Several organizations have formulated proposals for transitioning to 100% renewable energy, nationally or globally. In one of the most recent, developing on their earlier 100% global scenario, US academics Mark Jacobson and Mark Delucchi and their team have spelt out how 139 countries can each generate all the energy they will need from wind, water and solar (WWS) technologies by 2050, in substantial detail.

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Renewable growth continues

By Dave Elliott

While most future projections show global renewable energy expanding rapidly, some are more cautious and also present optimistic views on oil futures. For example, BP’s Energy Outlook 2016 sees oil still booming up to 2035, although it does see the use of coal falling and renewables expanding: ‘Renewables are expected to account for more than a third of EU power generation by 2035’. However, welcome though that view is, Carbon Brief said, ‘this sits awkwardly against the fact that renewables already supplied a third of EU power in 2014 and continue to expand rapidly’.  

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Balancing green power

By Dave Elliott

If the use of renewables is to expand further, ways have to be found of compensating for their variability. Fortunately there are many, as I have outlined in a new book ‘Balancing green power’, produced for the Institute of Physics. It sets out to show how, taken together, they can help balance grid systems as increasing amounts of renewable capacity is added, helping to avoid wasteful curtailment of excess output and minimising the cost of grid balancing. The options include flexible generation plants, energy storage systems, smart grid demand management and supergrid imports and exports.

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Energy system integration costs cut

By Dave Elliott

Imperial College London and the NERA consultancy have produced studies of energy system integration costs and grid balancing options for the government’s advisory Committee on Climate Change. They focus on flexible generation and backup systems and conclude that ‘flexibility can significantly reduce the integration cost of intermittent renewables, to the point where their whole-system cost makes them a more attractive expansion option than CCS and/or nuclear’.

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Greenpeace – 100% global renewables by 2050

By Dave Elliott

A new report from Greenpeace says the world can be 100% renewable in energy by 2050, and 65% renewable in electricity in just 15 years. The 2015 Energy [R]evolution report, the latest iteration in its global and local scenario series, says global CO2 emissions could be stabilized by 2020 and would approach zero in 2050. Fossil fuels would be phased out, beginning with the most carbon-intensive sources. (more…)

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Grid balancing ‘needs extra firm capacity’

By Dave Elliott

Even ‘very significant’ storage, demand-side measures and interconnection would not be sufficient to cope with intermittency in a weather-dependent renewables-based electricity system, according to modeling, up to 2030, by the Energy Research Partnership (ERP). It says there would still be a need to have a significant amount of zero-carbon firm capacity on the system too – for dark, windless periods. It could, for example, be supplied by nuclear, biomass or fossil fuel plants with Carbon Capture and Storage (CCS).

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