London Underground is planning to boost passenger capacity by increasing the number and size of its ‘Tube’ trains. However, on deeper parts of the network this will inject yet more heat into an already warm, subterranean environment which, combined with warmer weather, means cooling is now an essential part of upgrading works. This paper describes the challenges and proposed solutions for cooling the Victoria line, including doubling exhaust airflow capacity and innovative groundwater-based cooling systems for major stations.
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