Document IIF
Effet de la vitesse de l'écoulement de l'air d'un système de conditionnement d'air plafonnier sur l'efficacité de la ventilation d'un amphithéâtre.
Effect of the airflow rate of a ceiling type air conditioner on ventilation effectiveness in a lecture room.
Résumé
The authors performed a study on the effect of the discharge airflow rate of the ceiling type air-conditioner on ventilation performance in the lecture room with the mixing ventilation. The experiments and CFD were conducted for analyzing ventilation performance. The concepts of mean air age and indoor CO2 concentration were used for evaluating ventilation performance. The authors made the CO2 generation model in the simulation and calculated a lot of cases with respect to the airflow rate of air-conditioner and the mechanical ventilation rate. And the selected experimental measurements were performed in the lecture room of the same layout as the numerical one for verifying simulation results. Mean air age is gradually increased, but CO2 concentration is oppositely decreased in the occupied zone with the increment of the discharge airflow rate of the ceiling type air-conditioner. This result shows that both mean air age and residual life time must be considered for evaluating ventilation performance when the contaminants are generated indoors. And the increment of discharge airflow of the ceiling type air-conditioner can induce the piston effect and push the contaminants out of the occupied zone. From this result, it is found out that ventilation performance can be increased when the momentum source like an air-conditioner is used in the room with the mixing ventilation.
Documents disponibles
Format PDF
Pages : 180-188
Disponible
Prix public
20 €
Prix membre*
Gratuit
* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)
Détails
- Titre original : Effect of the airflow rate of a ceiling type air conditioner on ventilation effectiveness in a lecture room.
- Identifiant de la fiche : 2008-0830
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
- Date d'édition : 03/2008
Liens
Voir d'autres articles du même numéro (17)
Voir la source
Indexation
-
NATIONAL-GEOGRAPHIC IMPACT ON VENTILATION REQUI...
- Auteurs : MUHAXHERI M., KULIC E.
- Date : 01/08/1989
- Langues : Anglais
Voir la fiche
-
Finding the proper position of supply and retur...
- Auteurs : RAHVARD A. J., KARAMI S., LAKZIAN E.
- Date : 01/2023
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 145
- Formats : PDF
Voir la fiche
-
Air conditioning by the combination of radiant ...
- Auteurs : BUSWEILER U.
- Date : 01/11/1993
- Langues : Anglais
Voir la fiche
-
Numerical simulation of air distribution in cha...
- Auteurs : ZHAO B., LI X., LU J.
- Date : 2002
- Langues : Anglais
- Source : ASHRAE Transactions. 2002 annual Meeting, Honolulu, Hawaii. Volume 108, part 2 + CD-ROM.
Voir la fiche
-
Conception et analyse du système de conditionne...
- Auteurs : CHEN W. Y., ZHOU J. R.
- Date : 2004
- Langues : Chinois
- Source : Refrigeration - vol. 89 - n. 4
Voir la fiche