Finlanda varsă 380.000.000 de litri de apă într-o fostă carieră pentru a construi cel mai mare sistem de stocare termică din lume

Finland is constructing the world's largest thermal energy storage system in Hyvinkää, filling a former gravel pit with 380 million liters of water. This reservoir will meet nearly a quarter of the city's heating demand and is set to be operational by autumn 2027. The facility will utilize excess heat from electric boilers and nearby industrial waste heat during summer, storing approximately 18,000 megawatt-hours of heat, enough to heat around 1,000 homes for a year.