ABC Faculty Building UtrechtEdit profile
A special hybrid-heating concept was developed for the ABC-Education Facility in Utrecht, the Netherlands, in which the architectural layout of the building was fully utilised to develop the heating concept.
To establish a baseline temperature within the building, polyethylene pex tubing filled with water was placed 6 cm above the bottom of all the structural concrete floors. The tubes either cool or heat the floors. The temperature of the concrete floor is maintained at 22 degrees Celsius during winter and 18 degrees Celsius during summer. Additional radiators are placed in each room in order to control the individual heating demands.
Natural ventilation is used throughout the building. Outside air enters the building through the exterior skin. The air is then forced into the large open central areas within the building. The air is extracted from the building via three large glass enclosed atriums.
Special hydraulic roof lights allow for the air to be extracted from the three glass enclosed atriums. Sensors are placed at strategic locations within the building to monitor the temperature and the levels of CO2. If the air quality is insufficient, mechanical exhaust vents are activated. If the quality of the air is still below standards after the mechanical vents are activated; fresh air-supply vents are mechanically activated to supply the building with air.
If the outside air is either too hot or too cold for natural ventilation to take place, the entire heating and cooling system is changed to a mechanical ventilation system only.
During this second scenario, the air is still extracted thought the roofs of the three glass enclosed atriums.
Ductwork is used for the distribution of air throughout the building and heat exchangers are used to regain either cold or hot air depending on the heating and cooling demands within the building.