Paper 1: Volume 4 No.1 June 2005 Edition
Experimental Study of an Air
Distribution System for Operating Room Applications
Monika Woloszyn1, Joseph Virgone1 and
Stéphane Mélen2
1Centre de Thermique de Lyon, CNRS - UMR
5008, UCBL, INSA Lyon, Villeurbanne, France
²Air Liquide, Centre de Recherche Claude Delorme, Jouy-en-Josas, France
Abstract
An understanding of airflow patterns in operating rooms is
required if the design of air distribution systems in such environments is
to be improved and the risk of postoperative infection reduced. To assess
a detailed description of contaminant distribution, the airflow patterns
and the spread of contaminants in an operating room were analyzed using an
experimental model. These experiments were carried out in a test cell,
MINIBAT, equipped with an operating table, a medical lamp and a manikin
representing the surgeon. A diagonal ventilation system was tested for two
types of conditions: (i) isothermal, with the manikin and lamp switched
off and (ii) non-isothermal, with the manikin and lamp switched on. Indoor
air temperatures, air velocities and tracer gas concentrations were
measured automatically at more than 700 points. The overall airflow
patterns, due to ventilation, were very similar for the two experiments.
However, in the zone between the lamp, the table and the manikin (which
was the main area of interest), the tracer gas distribution was different.
In the non-isothermal case, the thermal plume from the manikin induced
better mixing, and had a beneficial effect on the evacuation of
contaminants. The thermal energy emitted by the lamp had almost no impact
on the airflow patterns.
Key words: air quality, air distribution, operating
room, operating theatre, hospital, contaminant, experiment, tracer gas,
medical.
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IJV Volume 4 No 1
Contents
Paper
1: Operating Rooms
Paper
2: Field Measurement
Paper
3: Flow Reversal
Paper
4: Thermal Comfort
Paper
5: Urban Buildings
Paper
6: Schools Acoustics
Paper
7: Field Study
Paper
8: Case Study
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