. Some say its citizens are the happiest people on Earth, possibly because of their fondness for watching those northern lights while sitting naked in an outdoor sauna with friends as they imbibe potent libations. It is also known for being quite chilly at times, which means it has placed a heavy emphasis on keeping its built environment warm during the winter months — which is to say between August 15 and July 9th of the following year.
“The world is undergoing a huge energy transition,” says Jukka Toivonen, CEO of Vantaa Energy. “Wind and solar power have become vital technologies in the transition from fossil fuels to clean energy. The biggest challenge of the energy transition so far has been the inability to store these intermittent forms of energy for later use. Unfortunately, small scale storage solutions such as batteries or accumulators are not sufficient. Large industrial scale storage solutions are needed.
The project, valued at around €200 million, is financed by Vantaa Energy, but has already been awarded a €19 million investment grant from Finland’s Ministry of Economic Affairs and Employment. Construction of the storage facility’s entrance is expected to start in summer 2024, and the seasonal thermal energy storage facility could be operational as early as 2028.District heating is the most popular form of heating for properties and homes in large cities in Finland.
The temperature of the water going to buildings is between 80 and 115° C , depending on the weather. In the return pipe, the water that has released its thermal energy is typically around 35 to 50° C . Modern district heating pipes are extremely low maintenance and have a long service life — up to 100 years. The Vantaa region has a total of 600 kilometers of district heating network.
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