Flooded disused coalmines could be a significant source of energy and provide cheap heat to thousands of homes, a new report argues.
Mine water geothermal heat (MWGH) systems use the water in flooded coalmines,
which is warmed by natural processes,
to supply low-carbon heat.
Heat exchangers and pumps recover the heat,
which is distributed via district heating networks to homes and buildings,
providing low-cost, long-term, stable energy.
Homogenization-based optimization of wall thickness distribution for TPMS two-fluid heat exchangers
Kaito Ohtani, Hiroki Kawabe, Kentaro Yaji, Kikuo Fujita, Vikrant Aute
https://arxiv.org/abs/2510.10622