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Last edited 29 Aug 2019
Waste heat from the Underground to warm offices and homes
|Waste heat from one of London Underground's tube lines will be used to warm homes in the capital from this winter.|
Ramboll has designed a heat pump that captures the excess heat from the ventilation shaft, before it is warmed to around 70 degrees Celsius. This will then be transferred into Islington's heat network to supply heat and hot water to properties.
Over the summer months, the system is designed to be reversed so that cool air can be piped into the tube tunnels.
According to the Greater London Authority, there is enough heat wasted in London to meet 38% of the city's heating demand. The expansion of district heating networks like Bunhill 2 could see this increase to 63% by 2050.
Lucy Padfield, director of district heating at Ramboll said: "We believe that the use of large-scale heat in this way connected to urban district heating systems will play a major part in decarbonising the UK's heating energy demand.
Bunhill 2 district heating system is currently expected in late 2019.
 About this article
This article was written by the Chartered Institute of Architectural Technologists (CIAT). It is based on a CIAT press release entitled 'London Underground's waste heat to warm hundreds of homes' and was published on the CIAT website in August 2019. It can be accessed HERE.
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