Southwark’s New
District Heating
Network
www.southwark.gov.uk
Southwark’s Carbon Reduction Strategy
Borough-wide CO2 emissions down by 80% by 2050
Council housing stock emissions down by 15% by 2022
Fuel poverty reduced
power station
combined heat
& power station
transmission
& distribution
gas
coal
nuclear
oil
50%
electricity
gas
bio-fuels
30% heat
Fuel input
100 %
62% heat loss
4% losses
34% of input
energy delivered
Fuel input
100 %
80% of input
energy delivered
20% losses
www.southwark.gov.uk
Background
Section 106
agreement tied to waste
facility site.
On-site renewable energy generation not feasible.
Agreement asked for community renewable energy
scheme instead.
www.southwark.gov.uk
De-centralised Heat Generation Proposal
Use SELCHP to distribute heat to local estates
Projected emissions reduction of 7,716 tonnes of CO².
www.southwark.gov.uk
Financial incentives
For Southwark:
• Cheaper than gas
• Low carbon
• Cost benefits to increase over time
For Veolia (Waste PFI partners):
• Price received was greater than electricity
• Cover construction and maintenance costs
www.southwark.gov.uk
How it works
• Steam drives a turbine to generate electricity
• Condensed back to water and returned to boiler
• We bleed off steam during this process
• It transfers its remaining energy into our network
www.southwark.gov.uk
: Locations of estates benefiting
: Location of SELCHP
www.southwark.gov.uk
How it works
• 1,200 Southwark properties benefiting
• Scheme funded by Veolia
• Potential to supply commercial customers
www.southwark.gov.uk
Technical Details
• 5km of pipe laid beneath roads
• Minimal heat loss
• Leak detection system
www.southwark.gov.uk
Technical Details
• SELCHP pumps drive 110 °C
water around the network
• Heat exchangers at each
boiler house
www.southwark.gov.uk
Delivering the Project
www.southwark.gov.uk
Delivering the Project
www.southwark.gov.uk
Problem solving
• Challenge of finding route for pipes:
• Potential damage to trees
•London Overground timetable
• Relocation of certain plant rooms
www.southwark.gov.uk
Problem solving
•Need for contingency solutions
•Desire to keep existing boiler
houses
•Disruption to residents being
minimised
www.southwark.gov.uk
Timetable to completion
• June and July: Completion of pipe laying and boiler room
modifications
• August and September: Testing and calibration
• October: Heat delivered
www.southwark.gov.uk