nuclear-news

Dunkelflaute (or… can we keep the lights on when the wind doesn’t blow and the sun doesn’t shine?)

Prof. Andrew Blowers tackles this question in the BANNG column for Regional Life, October, 2023  https://www.banng.info/news/dunkelflaute/—

The Blackwater estuary is a place where sea, land and sky meet. It is a vast natural environment where wind and sun provide unlimited resources that are transforming our energy supply as we shift from fossil fuels to low carbon renewables, in the desperate race to avert impending climate catastrophe.

There is one problem with a carbon free energy future built on wind and sun. That problem is Dunkelflaute, a German word meaning ‘dark doldrums’, times when there is little wind and sunlight. Think of those short, dark and windless days in mid-winter when lights and heating are on all day and the demand for power rises and the energy supply system is fully stretched. As we become more dependent on intermittent sources of electricity supply can we keep the lights on?

The answer must be ‘yes’, since not to have light is unthinkable in our modern society. But, how? For some, the answer lies in nuclear power which provides ‘firm power’, continuous generation able to meet baseload whenever Dunkelflaute persists. The Government recently proclaimed that ‘Nuclear is the critical baseload of the future energy system’. But, even if it were true, it hardly justifies the plans for massive investment in outmoded, dangerous and costly nuclear power plants that cannot conceivably be delivered until well into the next decade – if then. Installing big, inflexible nuclear will just get in the way of the flexible supply and demand management system for the future

‘Firm power which cannot be switched off when you don’t need it will be as much of a problem as variable power which cannot be switched on when you do. What is called for is flexibility, in huge quantities and of all types’. (Michael Liebreich quoted in Carbon Brief)

That future lies in wind and solar backed up by green power and by long duration storage (including battery, hydrogen and pumped hydro-electric). Distributed local heat and power systems, interconnectors with other countries and reducing and managing demand through energy efficiency and smart metering will all contribute to an energy system that meets net zero by the middle of the century.

It is already happening. At its present moment of hubris nuclear is already doomed. On the Blackwater estuary, the hulk of Bradwell A provides a forlorn epitaph to a bygone era. #nuclear #antinuclear #nuclearfree #NoNukes

October 23, 2023 - Posted by Christina Macpherson | renewable, UK