Interesting. Does anyone know what source of electricity is going to be used for this ? Probably solar but it might be also useful with coal plants or wind farms that produce even when there is not enough demand.
How are they moving the heat ?
Heat is transferred using disctrict heating networks where 65-120 C water is circulated.
There's not that much CHP production that there'd be excess, plus they can adjust those plants well enough that there's no unnecessary burning going on.
It's currently noon in Finland and solar accounts for 6 MW in the grid. That's about 0.05% of the total production. Nuclear is 3863 MW (~31%) and wind is 6281 MW (~50%).
What might be plentiful is wind, especially during the nights.
> "The installation will supply heat to the Vääksy district heating network and is expected to lower fossil-based emissions by approximately 60% annually, primarily through an estimated 80% reduction in natural gas consumption and reduced reliance on wood chips."
https://www.pv-magazine.com/2025/11/25/finlands-polar-night-...