We May Soon Be Able to Harness the Heat in Subway Tunnels to Cool Our Homes Instead

By District Energy posted 07-03-2019 00:00

  

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Summary

If you have ever ridden an underground subway system in the summer, then you’re probably familiar with the crippling heat and humidity that can come with it.

Thankfully, researchers now believe that we may be able to use the varying temperatures of transit systems to air condition and warm our homes instead.

The researchers from the Swiss Federal Institute of Technology Lausanne (EPFL) have precisely quantified convection heat transfer in rail tunnels. Using the new model, they estimated how much energy the city of Lausanne could save by fitting the future M3 metro line with a geothermal heat-recovery system, in what would be a world first.

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