Another rock cavern (40.000 cubic meters) to accommodate a #HeatPump constructed in Eira, a high-end residential district in Helsinki, 90 MWth #DistrictHeating + 60MWth #DistrictCooling.
This one is smaller than the nearby #KatriVala heat pump station (126MWth+80MWth).
Both use waste water as thermal heat source, but Eira can also use 30MWe direct electrical heating when power is cheap and waste water temperature low.
The project cost is 100 M€ and completed in 2025.
https://www.hs.fi/kaupunki/art-2000009946255.html