Heating Buildings With Solar Energy Stored in Sand
Cars That Think
JANUARY 18, 2023
It is a daunting question that a startup called Polar Night Energy, in the small and chilly nation of Finland (Figure 1), is attempting to answer. The system uses electricity to heat air, which is then circulated through an exchanger that heats water and distributes it to multiple buildings in the city’s Hiedanranta district (Figure 2).
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