Waterborne energy saving at Terminal 5

Tour and Andersson supply 1,841 valves and three TA-Aqua+ advanced oxidation technology units for Heathrow's new Terminal 5.

Tour and Andersson, the leader in hydronic balancing valves, has supplied 1,841 valves, including over 1,000 differential pressure and flow control combination valves, and three TA-Aqua+ advanced oxidation technology units, to Heathrow's new Terminal 5 buildings and rail station.

The system delivers energy efficiency and an optimum indoor climate control at Terminal 5 to time and on budget.

Specified by consulting engineers at Arup, and installed by Babcock Engineering Services, Tour and Andersson's innovative solution to the technical challenge delivers optimal energy savings across the site.

Energy efficiency was of prime concern for BAA, given the size and high profile nature of the Terminal 5 site.

Tour and Andersson's solution takes water from a district cooling scheme, supplied by a central chiller farm, to serve all buildings across the 260ha site at Heathrow.

The only chilled water pumps are located in the chiller farm, and not within the buildings themselves.

As a result of this set up there was the risk of intermittent pressure throughout the buildings on the site - creating an uncomfortable indoor climate and unnecessary noise.

This posed a challenge for the two-port control valves and the balancing of the systems.

Tour and Andersson's technical expertise meant an alternative solution was quickly found: KTM and DKH combination valves that provide greater flexibility, control and cost savings for any variable flow system.

Tour and Andersson's patented advanced oxidation technology has also been specified for Terminal 5.

TA-Aqua+ is a radical chemical-free method of preventing the lethal Legionella bacteria, which helps remove all micro-organisms from hot and cold systems.

When installed in a well-designed system the TA Aqua + ensures that the risks are virtually removed.

Tour and Andersson pre-calibrated to design flows all the PICV combination valves before delivery to site, and delivered them to the Terminal 5 storage area according to the schedule for onsite installation.

The ability to provide a robust supply of valves, combined with the technical and engineering expertise required to pre-assemble all the valves destined for Terminal 5 was a vital consideration in the specification.

Because of the prefabrication and delivery programme, Tour and Andersson had to ensure that the products would be ready for Babcock Engineering Services to install as quickly as possible.

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