JG Partnerships has partnered with E.ON and Citigen to engage key stakeholders, unlock access to decision-makers, and cultivate strong relationships that accelerate low-carbon energy solutions in central London.
The City of London is a dynamic and bustling hub with bold ambitions to become a zero-emissions zone - creating a cleaner, greener future for all who live, work, and visit. With around 8,000 residents and 480,000 daily commuters, the demand for reliable, sustainable energy is immense.
Balancing energy reliability with ambitious carbon reduction goals is a major challenge — made even more complex by the difficulty of installing new infrastructure beneath the City’s busy streets.
One innovative solution lies in tri-generation networks like Citigen -a discreet yet powerful energy centre located underground in the heart of London. By delivering decentralised, low-carbon, and cost-efficient district energy, Citigen is helping power the City’s transition to a sustainable future.
At the centre of London’s bustling Square Mile, Citigen delivers reliable, low-carbon energy through an advanced tri-generation system powered by internal combustion engines. It supplies heating, electricity, and cooling to meet the evolving demands of this densely populated urban core.
Spanning over 6km of heating and 4.5km of cooling networks, Citigen serves a mix of commercial and residential properties - from the Guildhall to the Barbican Centre - providing the equivalent energy needs of 11,300 homes. As a cornerstone of the City of London’s sustainability strategy, Citigen plays a vital role in helping meet ambitious environmental targets.
At the heart of London’s energy future, Citigen operates two high-efficiency MWM TCG 2032 V16 combined heat and power (CHP) units, each generating 4.3 MW of electricity and 4.1 MW of heat. By capturing waste heat from engine exhausts, turbochargers, cooling systems, and lubricating oil, the system maximises efficiency through advanced heat recovery and exchange technologies.
Cooling is delivered via a 3.3 MW high-efficiency electric chiller, contributing to a total cooling capacity of 6.3 MW. Citigen also houses E.ON’s UK City Energy control room, where more than 60 sites are monitored and managed in real time — ensuring operational excellence and giving customers complete peace of mind.
Driving sustainable urban innovation through strategic collaborations, engineering excellence, and future-forward solutions that shape smarter, greener cities.
7 St John’s Road, Harrow, Middlesex,
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