This is the world's first giant heat pump to serve as a central heating system for an entire city with tens of thousands of homes, using CO2, sea water and genius large-scale engineering.

Thanks to this heat pump, the city of Esbjerg in Denmark, will be able to quit burning coal for heating and use only renewable energy in one single move.

How does it work? What's the genius idea and secret components that make this concept viable? And, of course, how efficient can it be in energy consumption? In this video I find the answers from the engineers that created and manage the brilliant system.

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We explore engineering subjects and technologies that help humanity be efficient and sustainable – heat pumps, electric cars, electric trucks, electric planes, electric ships, synthetic fuel, hydrogen, solar energy, wind energy, electric grids, energy storage systems.