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It's too hot on the London Underground

17.11.2006

The record temperatures of the past summer have been hard on the London Underground, especially during rush hours.

Unlike the newer underground systems of the world, the London Underground, which appeared in 1863, does not have air conditioning. The creators of the system expected that trains would ventilate it, rushing through the tunnels. But global warming and the growing number of passengers have made summer temperatures unbearable in the stations and in the carriages. So, in mid-July 2006, the temperature in the cars was 47 degrees Celsius!

The point is also that the clay soil of London does not remove heat well from the tunnels. In 2003, the mayor of the British capital even offered a prize of one hundred thousand pounds for solving the problem, but the money remained unclaimed. Engineers at a London university have proposed using groundwater for cooling. Every day, 30 million liters of seeping water are pumped out of the tunnels.

At one of the stations, a system of heat exchangers installed between the platforms is being tested. The water flowing through the pipes cools the air, and the trains push it through a system of tunnels. According to calculations, the temperature in the cars will drop by six degrees Celsius.

If the project is successful, a similar system will be installed at another 30 stations. On the remaining 275, additional ventilation shafts may have to be punched.

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