Helsinki Coal Mine Energy Storage Project

What is the Pyhäsalmi Mine?

The Pyhäsalmi Mine, roughly 450 kilometres north of Helsinki, is Europe’s deepest zinc and copper mine and holds the potential to store up to 2 MW of energy within its 1,400-metre-deep shafts. The disused mine will be fitted with a gravity battery, which uses excess energy from renewable sources like solar and wind in order to lift a heavy weight.

Could a Pyhäsalmi Mine be transformed into a giant battery?

An abandoned mine in Finland is set to be transformed into a giant battery to store renewable energy during periods of excess production. The Pyhäsalmi Mine, roughly 450 kilometres north of Helsinki, is Europe’s deepest zinc and copper mine and holds the potential to store up to 2 MW of energy within its 1,400-metre-deep shafts.

Can underground space energy storage technology be used in abandoned coal mines?

The underground space resources of abandoned coal mines in China are quite abundant, and the research and development of underground space energy storage technology in coal mines have many benefits.

How will the closure of the Salmisaari coal power plant affect Helsinki?

The closing of the power plant will reduce Helsinki’s carbon dioxide emissions by 30 per cent from the previous year. The end of the operations of the Salmisaari coal power plant has a significant impact on Helsinki’s carbon dioxide emissions. Photo: Helen Helsinki’s climate goal is to achieve carbon neutrality by 2030.