Polar Night Energy has developed a thermal energy storage system which supplements renewable energy sources and reduces our ...

A small municipality in southern Finland recently installed the world's largest "sand battery" to supply the town's heating. The new sand battery, designed by Polar Night Energy, is effectively a ...

The polar night jet, the high-altitude winter wind that circles the Arctic, acts like a flywheel for the cold season in the Northern Hemisphere. As climate change erodes the temperature contrast that ...