City of Lappeenranta
Lappeenranta stores heat
In a pilot action by the City of Lappeenranta, new heat storage technology was tested. The heat battery is charged with affordable and low-emission electricity. Heat is discharged from
the battery into the district heating network as needed, which reduces the use of natural gas and heating oil in district heating production. This energy storage thus supports the potential to increase the share of renewable, variable electricity generation in the power grid.
An innovative heat battery using new technology has been installed in the Selkäharju district heating network. With the city’s action, Elstor Oy was able to implement the first industrial-scale heat battery and quickly test and further develop its technology. Based on the experiences from the pilot, the technology has now been further developed into a heat battery that is ready for mass production and can be used in industry.
The Selkäharju heat battery has reduced emissions from district heating production by 160 tCO2e during its first six months of operation. A single 5 MWh unit can save up to 480
tonnes of carbon dioxide per year. Additionally, this solution enhances the conditions for renewable electricity production.
Emission reduction from the Selkäharju heat battery in district heating production
during the first six months of operation: 160 tCO2e
During the trial period, the heat battery produced 620 MWh of district heating
