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CELSIUS Site Islington

Country & City

  • United Kingdom
  • London

Project

Contact Information

A mid-tunnel ventilation shaft on the London Underground and a UK Power Network electricity substation were identified as sources of waste heat that could be used to supply heat to Islington Council’s Bunhill Heat and Power heat network. As part of the CELSIUS project, Islington investigated how these sources of waste heat could be captured and integrated into the network. After choosing the ventilation shaft as the best option, the project involved extending the existing network by laying district heating pipework in a highly urbanised, mixed-use environment with already highly congested subterranean utility supplies. The demonstrator shows how existing networks can integrate waste heat capture and use heat from multiple local sources, as well as exploring the shift to lower temperature operating systems.

Before the expansion, Bunhill Heat and Power Network supplied heat to around 800 homes, four offices and two leisure centres. The expansion to the network will add a further 500 council homes and a private development with around 1,000 flats. The new energy centre is based around a 1MW heat pump that will provide heat into the network at a temperature of 75°C (the network previously operated at 90°C and has been reduced to 75°C to accommodate the heat pump) and a yearly production of 9,000 MWh. The total primary savings are estimated to be 6.7 MWh/yr and 500 tonnes of CO2/yr.

Financial & Economic

Financial & Economic
Country
Encountered barriers
Solution
United Kingdom

The UK government’s ECO scheme is designed to partially fund district heating network expansions as a low carbon solution. However, the government has repeatedly altered the scheme, leading to uncertainty over the level of funding available or even whether this project fulfils the criteria for applying.

The project has worked closely with an ECO broker to explore the opportunity of securing such funding. The results of these efforts haven’t been reported on yet.

Regulatory & Administrative

Regulatory & Administrative
Country
Encountered barriers
Solution
United Kingdom

The project wanted to x-ray the pipe welding in order to examine its quality. However, UK regulations require you to send a nuclear incident plan to local residents if you wish to do this.

Instead, an ultrasound was used to check the welds.

United Kingdom

As Islington is a densely populated and historic borough, planning controls are very restrictive, which was a problem when building an energy centre directly adjacent to a residential tower block.

The team worked closely with the planning department to work out what materials would be deemed acceptable.

Challenges

Challenges
Country

Description

United Kingdom

Lack of skilled district heating pipework welders in the UK.

Energy: 

*Information regarding the technical and financial performance will be available at a later stage.

Energy systems integration

  • District heating
  • Waste heat recovery
ICT: 
  • Demand response