City of London Corporation

City Surveyor's Department
City of London Corporation
Guildhall
PO Box 270
London
EC2P 2EJ
Tel: 020 7332 1252
Fax: 020 7332 1557

Andrew.Crafter@Cityoflondon.gov.uk
www.cityoflondon.go.uk

The City Corporation is the main customer for heating and cooling from the City of London CHP Tri-generation Scheme operated by Citigen
(London) Ltd. This is a large community energy system serving both private customers and City Corporation properties, the latter including the Guildhall, Smithfield Market, the Barbican Arts Centre and the Museum of London. The CHP system has been in operation since 1994 and was originally a City Corporation initiative in the late 1980s. Output of the central power station is currently 15 MW electrical, 21 MW heat and 6.5 MW chill. The dual-fuel CHP engine is one of the largest in the world to run on natural gas. Chilled water is produced by absorption chillers using heat from the engine. The City Corporation's subways and basements are used for the distribution of hot and chilled water and the transmission of electricity to the local grid connection point.