Cool-Therm shortlisted for two awards for Canary Wharf replacement chiller project

A Cool-Therm installation at Canary Wharf has been shortlisted for two major awards in the forthcoming Cooling Industry Awards 2016.

The project involved replacing the fresh air cooling and heating system in one of Canary Wharf’s iconic buildings, on behalf of a major financial organisation. The new system dramatically reduced building running costs and carbon emissions, while providing outstanding indoor comfort for occupants.

It has been shortlisted for Low Carbon Achievement of the Year, and Building Energy Project of the Year, with the finals taking place at The Hilton on London’s Park Lane on 28 September.

This latest recognition follows Cool-Therm’s achievement earlier this year of the award for Building Services Project of the Year, in the H&V News Awards for Excellence.

Energy costs for the building have been reduced by almost £5,000 per week amounting to £255,027 a year. Savings will continue to accrue over the anticipated 10 to 15-year operational life of the plant, delivering total lifetime savings of between £2.55m and £3.8m.

Designed and installed by Cool-Therm in collaboration with Gratte Brothers and WSP London, the replacement system is based on all-fresh air heating and cooling. This is supplied by high performance Air Handling Units (AHUs), with a combination of water-to-air heat pumps and dx cooling.

Key to its efficiency is the harnessing of energy from condenser water that flows through the buildings central cooling system.
The building was originally equipped with a hvac system based on six US-made Mammoth fresh air AHUs, providing dx cooling with electric heating. The system was inefficient and under-powered given increases in the intensity of building usage over time. It was also proving expensive to maintain.

The brief was to replace the system to deliver substantial savings in energy running costs and carbon emissions, while increasing capacity by 25per cent. The plan had to be based on an all-fresh air system to maintain a high quality indoor environment.

Despite the increase in duty, the replacement solution had to occupy the same or smaller footprint as the original plant due to space restrictions on site.

Cool-Therm’s solution is based on six Clima Tech AHUs linked to six Geoclima water-to-air heat pumps. Each AHU has a capacity of 16.5 m3/sec, and each heat pump a heating capacity of 354kW and cooling capacity of 393kW.
This gives an enormous total fresh air volume for the installation of 99m3/sec, total heating capacity of 2.34MW and cooling capacity of 2.12MW.

The phased project had to be carried out over three separate, carefully managed stages as the existing ventilation system could not facilitate a total shutdown of fresh air systems.
To minimise energy usage in heating mode, heat from condensing water (normally discharged via the building’s cooling towers) is captured by the heat pumps for use in pre-heating air. To ensure the purity of fresh air supplied to the building, a two-stage filtration process is used.

As a result of the successful project, Cool-Therm was invited to bid for and successfully won the contract to replace the ageing chillers on the building.