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TfL, to its credit, has made many efforts over the years to try to deal with the problem of hot tunnels, including attaching cooling panels to tunnel walls. The panels, which circulate water to remove heat from the air, were deployed in a trial in 2022, though they are not currently in use. Paul argues that such a system could be prohibitively expensive.
Hassan Hemida at the University of Birmingham says Paul’s water-cooling technology is a “good idea,” though it remains to be seen how much heat it…
