| Document ID (ISN) | 66869 |
| CIS number |
96-760 |
| ISSN - Serial title |
0829-0369 - Travail et santé |
| Year |
1996 |
| Convention or series no. |
|
| Author(s) |
Auger M., Farant J.P. |
| Title |
Method for the measurement of ventilation efficiency in office buildings |
| Original title |
Méthode pour la mesure de l'efficacité de ventilation dans les édifices à bureaux [in French] |
| Bibliographic information |
June 1996, Vol.12, No.2, p.S-9 to S-12. Illus. 9 ref. |
| Abstract |
Ventilation efficiency is a measure of the ability of a ventilation system to circulate air and to dilute pollutants. The ASHRAE standard recommends 10L/s/person as an acceptable value for fresh air to occupants. This rate however must be increased if the air does not circulate adequately. A new method has been developed in a test chamber to measure efficiency by simulating the CO2 generated by the occupants. The method consists of a 0.3L/minute injection of CO2 towards a CO2 monitor. This corresponds to the average production rate of CO2 from a sedentary human being. The efficiency is calculated by taking the difference between the maximum concentration obtained during the injection and the concentration before the injection. Results are presented for room/supply temperature difference of 6°C and 9°C and for air velocities of 0.07m/s and 0.45m/s. In all cases, the ventilation rate was fixed at 19L/s. Efficiencies varied by a factor of 1.5 for supply temperature changes and by a factor of 6 for air velocities. Since the method is different from existing methods, results are compared on a relative basis. This method responds to the mixing conditions in the room but additional research needs to be done by varying air flow rates. It is easy to use and can be easily applied in field conditions. |
| Descriptors (primary) |
offices; ventilation design; ventilation |
| Descriptors (secondary) |
aerodynamics; air exchange rate; description of technique; airflow measurement; flowrate measurement; theoretical analysis |
| Document type |
D - Periodical articles |
| Country / State or Province | Canada |
| Subject(s) |
Heating, ventilation and climate
|
| Broad subject area(s) |
Chemical safety
|
| Browse category(ies) |
Ventilation
Office work
|
