Abstract
The handling of toxic, radioactive or dangerous substances in industry of research laboratories necessitates the use of techniques for protecting the workers involved. The risks arise from these substances being airborne particles and from their transfer, essentially through turbulent diffusion. One way of limiting this risk is to employ the principle of dynamic containment, whereby a particular direction of air flow is imposed at inlets and outlets in order to prevent the back flow of the pollutant to areas where it may be breathed by the operators. The air velocity normally used to prevent back flow of pollutant is 0.5 m.s. The `Service d`Etudes et de Recherches en Aerocontamination et en Confinement` (SERAC) has begun an evaluation of the effect of a reduction in air inlet velocity on the risk of pollutant back diffusion. This should lead to energy savings through the use of a minimum air flow rate concomitant with appropriate protection. The paper gives the results obtained with openings of different geometries and shapes. It is also proposed a simulation of this phenomenon using a calculation code of air flow in a ventilated room (the TRIO code), so that the results may be compared with the experimental data.
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Citation Formats
Laborde, J C, Berne, P, and Dupoux, N.
Optimization of the velocity of air providing dynamic containment at openings.
France: N. p.,
1992.
Web.
Laborde, J C, Berne, P, & Dupoux, N.
Optimization of the velocity of air providing dynamic containment at openings.
France.
Laborde, J C, Berne, P, and Dupoux, N.
1992.
"Optimization of the velocity of air providing dynamic containment at openings."
France.
@misc{etde_10111353,
title = {Optimization of the velocity of air providing dynamic containment at openings}
author = {Laborde, J C, Berne, P, and Dupoux, N}
abstractNote = {The handling of toxic, radioactive or dangerous substances in industry of research laboratories necessitates the use of techniques for protecting the workers involved. The risks arise from these substances being airborne particles and from their transfer, essentially through turbulent diffusion. One way of limiting this risk is to employ the principle of dynamic containment, whereby a particular direction of air flow is imposed at inlets and outlets in order to prevent the back flow of the pollutant to areas where it may be breathed by the operators. The air velocity normally used to prevent back flow of pollutant is 0.5 m.s. The `Service d`Etudes et de Recherches en Aerocontamination et en Confinement` (SERAC) has begun an evaluation of the effect of a reduction in air inlet velocity on the risk of pollutant back diffusion. This should lead to energy savings through the use of a minimum air flow rate concomitant with appropriate protection. The paper gives the results obtained with openings of different geometries and shapes. It is also proposed a simulation of this phenomenon using a calculation code of air flow in a ventilated room (the TRIO code), so that the results may be compared with the experimental data. (author). 5 refs., 10 figs., 1 tab.}
place = {France}
year = {1992}
month = {Dec}
}
title = {Optimization of the velocity of air providing dynamic containment at openings}
author = {Laborde, J C, Berne, P, and Dupoux, N}
abstractNote = {The handling of toxic, radioactive or dangerous substances in industry of research laboratories necessitates the use of techniques for protecting the workers involved. The risks arise from these substances being airborne particles and from their transfer, essentially through turbulent diffusion. One way of limiting this risk is to employ the principle of dynamic containment, whereby a particular direction of air flow is imposed at inlets and outlets in order to prevent the back flow of the pollutant to areas where it may be breathed by the operators. The air velocity normally used to prevent back flow of pollutant is 0.5 m.s. The `Service d`Etudes et de Recherches en Aerocontamination et en Confinement` (SERAC) has begun an evaluation of the effect of a reduction in air inlet velocity on the risk of pollutant back diffusion. This should lead to energy savings through the use of a minimum air flow rate concomitant with appropriate protection. The paper gives the results obtained with openings of different geometries and shapes. It is also proposed a simulation of this phenomenon using a calculation code of air flow in a ventilated room (the TRIO code), so that the results may be compared with the experimental data. (author). 5 refs., 10 figs., 1 tab.}
place = {France}
year = {1992}
month = {Dec}
}