Post by cyrilr on Oct 14, 2023 22:47:30 GMT 9.5
Article about using flooded old coal mines as a hot water source.
www.euronews.com/green/2023/10/14/flooded-and-forgotten-how-europe-s-disused-coal-mines-could-help-heat-our-homes
Article seems a bit over optimistic and doesn't provide perspective. For example, the claim of 2 billion m3 of hot water seems big, but is actually quite modest.
2 billion m3 * 4.18 MJ/K * 20K dT = 167.2 billion MJ. That's equivalent to less than 5 billion m3 of natural gas.
With 28 million households in the UK, even with very good insulation (say average of 1000 m3/year/house) this will heat the UK's households for 2 months.
Not exactly sustainable!
www.euronews.com/green/2023/10/14/flooded-and-forgotten-how-europe-s-disused-coal-mines-could-help-heat-our-homes
Article seems a bit over optimistic and doesn't provide perspective. For example, the claim of 2 billion m3 of hot water seems big, but is actually quite modest.
2 billion m3 * 4.18 MJ/K * 20K dT = 167.2 billion MJ. That's equivalent to less than 5 billion m3 of natural gas.
With 28 million households in the UK, even with very good insulation (say average of 1000 m3/year/house) this will heat the UK's households for 2 months.
Not exactly sustainable!