Great to be invited to speak at the launch of a new study across the West of England Combined Authority area into the potential for gathering heat from mines for domestic and commercial heating via heat networks.
Vattenfall aren't directly involved but are of course providing any guidance required on business models, infrastructure, and stakeholder engagement.
My key takeaways:
- The whole area is dotted with former mine heads many of which will provide an excellent opportunity to harvest heat, and many of these sit under the areas in which Vattenfall will be developing heat networks as part of Bristol City Leap
- An interesting opportunity is the possibility of using these mines as inter-seasonal thermal storage. As we plan the expansion of the heat network across Bristol and into South Gloucestershire, we are finding more and more potential sources of waste heat from large office buildings, data centres and other industrial processes. These are of course most useful in the winter but most abundant in the summer so the possibility of dumping heat into mines could really move the needle on heat availability and our ability to expand
- Sources of waste heat and demand don’t always line up but in places such as Radstock, there is certainly potential. Pathfinder projects such as Gateshead and Swaffham Prior have shown that the mine heat technology is viable and that heat networks can serve smaller communities (respectively) but this comes with huge challenges and there's a major role to be played by regulation
- Aggregating demand to give surety to network operators is a challenge in big cities, let alone small towns. Heat Network Zoning will compel larger buildings in zones to connect to heat networks on the basis that it might not be the best solution for every building but it will be the only solution for many buildings. But, there are no plans to draw zones for smaller towns or to require smaller buildings or individual homes to connect.
- Funding is another major challenge. Drilling is a high risk activity from a commercial perspective and current grant funding available for capital investment in heat networks is largely being snapped up by larger, more obviously viable projects at the demand and supply end
- For networks supplying existing communities to be successful, support will be needed for individual home connection along the lines of the Boiler Upgrade Scheme which provides £7,500 for air source heat pump installations
- Finally, community involvement is key from an early stage; in defining solutions, bringing residents along for the ride but also potentially owning heat generation assets to return benefits to the locality. All things we are exploring in Bristol.
It was an excellent event and there is clearly a challenging potential for bringing the formerly polluting coal mines into the 21st century by playing a major part in reducing our carbon emissions.
Plus, I’d advise everybody to visit the Radstock Museum!
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