38 Chillers
Carrier brings AquaForce to Ludgate
N A LANDMARK project, two new prestigious office developments at 1 and 2 New Ludgate in the heart of London have been equipped with high efficiency AquaForce chillers with Greenspeed intelligence from Carrier Air Conditioning.
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The installation is the first European application of Carrier’s new 30XAV 950 AquaForce chiller, equipped with variable speed drive (VSD) inverter-driven screw compressors.
The chiller delivers excellent part-load efficiency and offers high performance cooling with a compact design, enabling the chillers to be located within restricted space on the rooftop.
Carrier worked closely with the client, consultant and contractor, SRW engineering services, to design and build a solution to meet stringent efficiency and noise requirements for the new Land Securities buildings.
Air conditioning for the buildings is supplied by six Carrier 30XAV 950 AquaForce chillers with VSD-controlled screw compressors, alongside three updated Carrier RBM 520 and three Carrier 30RBM 420 AquaSnap chillers with scroll compressors.
Carrier experts overcame a number of site-specific challenges, including a strict noise specification due to the premium nature of the development and its close proximity to residential apartments.
Carrier designed and built a custom package to totally enclose the chillers, further reducing the already low noise performance of the new AquaForce chiller. This was tested in Carrier’s laboratory at Montluel near Lyon, France, to ensure it met the client’s requirements. The original design proposed locating the water-cooled chillers in the basement. However, as a result of the compact footprint of the AquaForce chiller, Carrier presented an alternative design that accommodated the chillers on the roof, making basement space available for alternative uses.
The project included a bespoke pump, control and chiller sequencing package.
ACR News August 2015
“The software was programmed in-house and designed to maximise energy efficiency and air conditioning performance, as well as extend the working life of chillers by careful run- time sequencing,” said Danny Lear, specification and solutions manager, Carrier UK. “We were able to carry out full witness testing of working chillers at Carrier’s facility in France, ensuring the solution fully met the specification.” Following installation, Carrier’s service team will ensure the chillers are maintained at peak performance level under a full maintenance contract. Lee Pegram, project lead at Land Securities, said: “The exceptional quality developments at 1 and 2 New Ludgate had an equally challenging building services brief. We worked closely with Carrier throughout the process to ensure a successful result. It provides a compelling example of the effectiveness of teamwork and partnership approach in action.” Andy Farmer, who led delivery of the SRW engineering services contract, said: “Carrier Air Conditioning were advocates of the collaborative approach. They were keen to understand how they could adapt their chillers and software to meet the client’s needs and deliver an even better result. Carrier worked with other contractors to deliver a solution that exceeded expectations by minimising noise levels.”
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