Paper Conference

Proceedings of eSim 2012: 7th Conference of IBPSA-Canada


Simulink® Model of Single CO 2 Sensor Location Impact on CO 2 Levels in Recirculating Multiple-Zone Systems

Annie-Claude Lachapelle, James Love

Abstract: Building ventilation can be modulated based on occupant requirements determined by monitoring CO 2 concentrations. These CO 2 concentrations are sometimes monitored in a common air duct to reduce costs. Warden (2004) suggested that a single CO 2 sensor located in the supply air duct (SACO 2-DCV) may provide better control of CO 2 in rooms with higher occupancy density than return air duct (RACO 2-DCV) placement systems serving multiple zones. Stanke (2010) pointed out that Warden failed to account for varying space population and airflow requirements. This research evaluated Stanke's observations using a hypothetical four-room-school model built with Math-Works®' Simulink®. The results showed that Warden's claim was valid for a dynamic environment but that SACO 2-DCV may overventilate spaces when occupancy varies. The simulation provided a graphical representation of the impact of CO 2 sensor location on room CO 2 levels when implementing CO 2-DCV in recirculating multiplezone systems.
Pages: 189 - 201