Abstract
This paper describes a laboratory project to assess the accuracy of a lumped-parameter model used in predicting carbon dioxide concentrations in a slot-ventilated airspace. The carbon dioxide concentration was characterized in an environmental chamber by measuring its equilibrium concentrations over a range of ventilation rates. The transient behavior response of carbon dioxide concentrations was evaluated at three points and monitored as a function of ventilation rate. The model calculation solved as a three-dimensional lumped form of control volumes representing conservation of airflow rate. The results show that measured carbon dioxide concentrations are compared very favorably with those predicted by a lumped-parameter model (deviations were 8%-14%). The results also suggest that the range of ventilation rate when this model can be suitably applied is between 1000m3/h and 370m3/h.
