4 ms·
It sounds like it took many decades for the surrounding soil to heat up, so without 100xing the rate of cooling from the soil relative to the existing rate of h
by foota 7y ago
It sounds like it took many decades for the surrounding soil to heat up, so without 100xing the rate of cooling from the soil relative to the existing rate of heating I'm skeptical, given that the heating resulted from a temperature differential of likely a few dozen degrees, you would need a substantially cooler environment to cool the soil. Maybe with a massive investment you could do it by cooling the tunnels to substantially sub zero temperatures.
- cheerlessbog 7y agoMore info for those like me who were unaware https://en.wikipedia.org/wiki/London_Underground_cooling https://en.wikipedia.org/wiki/London_Underground_cooling
- Toenex 7y agoThanks that was an interesting read. If the heat sink begins to dissipate are any structural risks to the network?
- Reason077 7y agoGiven that the trains are reported to be the largest sources of heat, the best solution in the long term will be new, more efficient trains. New drivetrain technology is already far more efficient, producing less waste heat, than the decades-old stuff still being use on most London Underground lines. In new trains, more powerful regenerative braking rather than friction braking will dramatically reduce heat produced from braking, for example. (It will mean less dirty air on the Underground, too!)