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Airborne Cross-Infection Risk Between Two People in a Displacement Ventilated Room
Conference Proceeding by ASHRAE, 2011
Peter V. Nielsen, PhD, Fellow ASHRAE; Inés Olmedo Manuel; Ruiz de Adana, PhD; Piotr Grzelecki Rasmus; L. Jensen, PhD
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A tracer gas N2O is used to represent the gaseous substances exhaled by the source manikin. The concentration of N2O is measured to study the impact of the following parameters on the exposure: distance between manikins, positions as face to face, face to the side of the target manikin, face to the back of the target manikin, and a seated source manikin. The exposure increases with decreasing distance between the manikins, and the highest values are obtained in the face to face position. Face to the side is also giving some exposure of the target manikin, while face towards the target manikin's back does not give any direct exposure through the microenvironment. The thermal stratification in the room supports a significant exposure of the target manikin when the source manikin is seated breathing towards the chest of a standing manikin.
Citation: IAQ Conference: IAQ 2010: Airborne Infection Control