A new initiative to use underground mine-water to warm homes in Bridgend has been given £6.5m of funding from the EU and £2.2m from the UK and Welsh Government.
Water in the underground former Caerau colliery has been naturally heated by the earth and, as a geothermal source of energy, Bridgend County Borough Council is investigating ways in which it could be extracted using heat pump technology and a network of pipes.
The scale of the scheme will be the first of its kind in the UK and would use existing radiators to heat homes without mine-water ever entering residents’ properties.
This kind of technology is already used in the Netherlands, which opened the world’s first mine-water power station in 2008 in the town of Heerlen – a coal-mining area that closed its last mine in the 1970s.
Cabinet Secretary for Energy, Planning and Rural Affairs, Lesley Griffiths, said: “Our ambition is for our nation to be a world leader in pioneering low carbon energy.
“This is a cutting-edge model of generating a clean source of renewable energy, drawing on the legacy of our coal mining heritage.
“It will not only attract further investment to the
“This EU-funded scheme will also create jobs both within the initial construction period and the ongoing supply chain, as well as
The findings of a feasibility study to determine if the water is warm enough to heat homes are expected by the end of February.
This follows test drilling into the mine workings under the Old Brewers site in Caerau which found that the mining void is full of water to a depth of 230m.
The British Geological Survey has since been testing the temperature, chemistry and volume of the mining-water, with the temperature expected to be around 20.6 degrees
Councillor Richard Young, the council’s Cabinet Member for Communities, said: “The volume of water and its temperature makes the scheme possible and now we have been awarded £6.5m of EU funds from the Welsh Government, the next phase is to work through the full scope of the scheme and put everything in place to deliver a trailblazing project for the Llynfi Valley.
“It will also act as a catalyst for other energy project investments, possibly through the City Deal and other investment.”
While the initial heat network will involve 150 properties, and the nearby school and church, there may be potential for the scheme to eventually warm up to a thousand local homes.
An exhibition is planned for spring 2018 when findings from the feasibility study will be shared with Caerau residents and construction work will begin in 2020.