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  • Writer's pictureCavendish Engineers

London Bridge City

Updated: Feb 8, 2021

London Bridge City sits in close proximity to HMS Belfast and is a combination of retail units, office space and 23 residential flats.

Cavendish Engineers’ innovative experience and expertise was used across different areas of the boiler house system at London Bridge City, resulting in an 82% energy saving for the complex.

Cavendish Engineers were brought in with a view to modernising and affecting improved efficiency and energy savings.

Over a 15-week period Cavendish Engineers oversaw the removal and replacement of the old system dating back to the Eighties and installation of new efficient and innovative technology.

The building’s existing cast iron boiler was cut into smaller sections, enabling it to be safely removed without damaging the existing fabric of the building and allowing it to be manually handled safely.

This was achieved using an Oxy Acetylene torch, lifting hoist plus frame and skates. A wall hung boiler system that was designed by Cavendish Engineers and featuring 3x100KW modules was installed and commissioned.

Working closely with the incumbent maintenance contractor, Cavendish replaced primary and secondary LTHW Pumps (duty and standby) while the system was live, due to the constant seven day heating requirement. Three condense and three chilled water pumps were also replaced with energy saving equivalents without any disruption to services.

Cavendish Engineers designed and installed (used a Spiering’s AT5 crane) a cooling coil and heat pump to the ventilation plant on the roof that would manage the temperatures of the corridors within the residential area of the complex.

With 20 people on site per day, Cavendish Engineers worked closely with a structural engineer around the management of the AT5 crane.

The cobbled residential road site for the crane was assessed in advance while Cavendish Engineers liaised with the client on meeting the criteria needed to position the heavy duty lifting equipment within the local area.

Other work on site included the installation of a new 9000 litre water tank and booster set to revitalise the domestic water system. A new plate heat exchanger was also installed and hot tapped into to the LTHW system plus new Mapress pipework was run from the basement to the first floor mechanical riser.

This allowed Cavendish Engineers to refeed the riser, bypassing leaking pipework in the ceiling void of a restaurant and providing the delivery of LTHW services to the office space that the riser feeds while ensuring no disruption to the tenant.

The work across the residential boiler room and pipe work connections were designed by Cavendish Engineers via BIM’s Autodesk Revit software. This allowed Cavendish Engineers to assemble and install the system quickly, halving the traditional site time, while the new wall hung system freed up much needed space within the boiler house.

The new Cavendish Engineers system at London Bridge City provided the installed pumps and boilers with their own intelligence, allowing the technology to make energy related decisions based upon outside temperatures.

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