The British Geological Survey and Coal Authority have released maps that for the first time reveal the extent to which heat is stored in Britain’s abandoned coal mines.
According to the Coal Authority, one quarter of the UK’s population live above abandoned coal mines. The mines are warmed by natural geothermal processes and where the mines are flooded, these are now being developed as a source of low carbon energy to heat homes and businesses.
To understand its potential more effectively, the British Geological Survey (BGS) and the Coal Authority have released an interactive map showing where the mines are and the extent by which temperatures increase with depth.
The new mapping tool will be freely available to use by developers, planners and researchers to identify opportunities to investigate the use of mine water as a sustainable heat source.
View the online mapping tool – use the drop down menu at the top right hand side of the screen to select Temperature Maps
It is the first time the data has been brought together in this way, and illustrates the long-term feasibility of heating homes and buildings using this zero-carbon energy source.
BGS geoscientist Gareth Farr, who led the project, said:
The UK government has a target to increase the number of homes on heat networks from 2% to 18% by 2050. It is recognised that geothermal energy from mines, combined with heat pump technology, could provide a sustainable energy source for these networks that is both local and low cost.
Technical specialists at the Coal Authority say there is potential to kick-start a new renewable industry, creating employment, tackling climate change and attracting investment to the coalfield communities previously disadvantaged by mine closures.
When aligned with the government’s ten point plan for a green industrial revolution, the warm water in abandoned coal mines is now being seen as a viable new form of sustainable energy with the potential to play a vital role in making homes and public buildings greener, warmer and more energy efficient.
The Coal Authority’s Head of Innovation, Jeremy Crooks, said:
The interactive maps highlight areas where warm water has been abstracted by pumping, creating opportunities to harvest heat without drilling into the workings.
Mr Crooks added:
The research behind the maps is published in an open access paper by the Quarterly Journal of Engineering Geology and Hydrogeology.