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. In an era of complex cleantech solutions, often made from rare and expensive materials, Polar Night Energy’s heat storage and distribution system consists of simple ducts, pumps, valves, and sand.
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