Flow measurements using rracer gas reclmiques were made on tile exterior doorway of a test house for indoor-outdoor temperature differetJces of 0.5-45 K. The time for door opening and closing was constant at 3.75 s, and fully open hold time varied from 0.5 s to 120 s. Predictions of a variable density sready flow model were in good agreement with the measurements when adjustmenrs were made for the time-varying size of the opening and for the effect of cross-stream mixing between the incoming and outgoing air streams.
For more than a century air quality standards have been based on the Pettenkofer Theory, which regards the human being as the decisive source of air pollution in residential and community building. Regrettably these standards have not prevented many buildings from having serious air quality problems. Presented here is a new philosophy of ventilation, which takes into account pollution sources other than human contiminants and tobacco smoke, e. g. construction materials, furniture, and utilities. Use is made of the new quantities for measuring perceived air quality, the olf and the decipol.
The studies described in the present paper have been developed by the teams involved in the French National Research Programm "ARC Convection Naturelle dans l'Habitat" coordinated by CNRS-PIRSEM (Inte disciplinary Research Programm on Energy and Materials, National Scientific Reseach Center) and suported by AFME (French Agency for Energy Management). After a short description of the experimental facilities of each laboratory, we give some significant results on high Rayleigh number natural convection in rooms.
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