The largest AWADUKT Thermo ground-air heat exchanger system ever installed in Scotland can now be seen at the newly refurbished and extended Banff and Buchan College in Fraserburgh. The benefits of the passive cooling capability were a significant factor in it being chosen to provide a healthy and comfortable learning environment.
The REHAU system draws air from outside at a rate of 16000m³/Hr through a 42m x 30m grid of REHAU AWADUKT Thermo polypropylene pipework, 1.5m below the playing fields of the college. This allows optimal heat transfer to take place between the ground and the air so resulting in the air being warmed by up to 9ºC in winter and cooled by as much as 14ºC in summer by the time it reaches the air handling unit (AHU).
This will have a significant impact on the energy loading of the AHU and will eliminate the requirement for refrigerant based mechanical cooling to counter the heat gain in the building generated by high occupancy levels and large amounts of glazing, particularly in the atrium.