Why The London Underground Makes Itself Hotter Every Year

Summary by Krater

This video explains why the Central line on the London Underground gets uncomfortably hot and why it is difficult to cool down, concluding that adding air conditioning or more ventilation shafts is impractical due to train size constraints and urban policies.

From the video

Answers: Why is the Central line on the London Underground so hot?

• London Underground heat issues
• Central line tunnel temperature
• Train friction and heat generation
• Deep tube ventilation challenges
• Air conditioning constraints on subways

What it concludes

• About 45% of the London Underground is actually underground.
• The Central line regularly exceeds 30 degrees Celsius or 86 Fahrenheit, making it hotter than the legal limit for transporting farm animals.
• Air conditioning cannot be fitted on Central line trains because the tunnels are too small.
• Adding air conditioning to trains would make the tunnel heat problem worse by expelling hot air into the tunnels.
• About 79% of the heat generated by trains is absorbed into the clay surrounding the tunnels.