1 Department of Civil Engineering, Technical University of Denmark2 Section for Building Physics and Services, Department of Civil Engineering, Technical University of Denmark
The study investigated performance of two commercially available non-selective metal oxide semiconductor VOC sensors and two commercially available non dispersive infrared CO2 sensors installed in one person office. The office was equipped with demand controlled ventilation. The signals from VOC and CO2 sensors, presence detection sensor and supply/return air flow were logged. VOC and CO2 signals were in agreement with respect to indicated need for mechanical ventilation for 49 % of occupied time (81 % of whole measuring period). VOC measurement would clearly trigger the mechanical ventilation in contradiction with CO2 measurement in 11 % of occupied time. Opposite situation was observed in 6 % of occupied time. In approx. 22 % of occupied time CO2 signal has just reached the set-point while the VOC signal was significantly below. In that case the ventilation start up would be dependent on settings of a particular controller.
Proceedings of Indoor Air 2014, 2014
Demand Controlled Ventilation; VOC sensor; CO 2 sensor; Field measurements
Main Research Area:
13th International Conference on Indoor Air Quality and ClimateInternational Conference on Indoor Air Quality and Climate, 2014
International Society for Indoor Air Quality and Climate (ISIAQ)