Turning train tunnels into giant "fridges" could heat thousands of homes

Full of trains, electronics and people packed in like sardines, subway tunnels are pretty warm places. In theory, all that heat could present an untapped source of energy, if only it could be captured. Now, researchers at EPFL have crunched the numbers on heat transfer in the air of train tunnels, and outlined a geothermal heat recovery system that could potentially supply heating and cooling to thousands of nearby homes.

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Category: Energy

Tags:

• Cooling
• Energy
• EPFL
• Heating
• Trains
• Tunnel

from New Atlas (Gizmag) https://ift.tt/31VZ1G7