Cool-Therm has won a prestigious Architects’ Journal award for a project at Canary Wharf. It involved replacing the cooling and heating system in one of London’s iconic buildings on behalf of a major financial organisation.
The new system has dramatically reduced building running costs and carbon emissions, while providing outstanding indoor comfort for occupants. As a result, Cool-Therm was presented with the award for Product Innovation of the Year in the Architects’ Journal Retrofit Awards 2016, presented at a gala evening in the City of London.
Designed and installed in a collaboration between WSP/PB London, Gratte Brothers and Cool-Therm, 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 heating and cooling.
Following installation, energy costs have been reduced by some £255,027 a year, amounting to nearly £5000 per week. 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.
The AJ accolade is the latest industry recognition for the project, which has also won the award for Building Services Project of the Year (H&V News Awards 2016), as well as being shortlisted for the Sustainable Project of the Year in the forthcoming H&V Review Awards 2016.
The key to its efficiency is the harnessing of energy from the condenser water system which serves the building predominantly for cooling. 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-sized given the increase in the building occupancy density building 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 the supply air 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.
The Team’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 completion of the project, Cool-Therm was invited to bid for and successful won the contract to replace the ageing chillers on the building.
For more details, contact Cool-Therm on tel: 0117 9610006 or email: email@example.com