Partager

Expérience et simulation par la dynamique des fluides numérisée d'un système de ventilation local push-pull dans une usine : efficacité de captage de la ventilation locale push-pull et perturbations causées par la ventilation générale.

[In Japanese. / En japonais.]

Auteurs : KONDO Y., YOSHINO H., TANAKA T.

Type d'article : Article

Résumé

In working spaces, such as factories and commercial kitchens, it is very important to remove contaminants generated during operations locally and keep air quality healthy in breathing zones. The push-pull ventilation system is considered as an effective method under such conditions, therefore it has been widely used in Japan recently. The effectiveness of the local ventilation system is affected by the airflow around it. If the airflow between the push hood and the pull hood is disturbed by the ambient flow, such as air jets caused by air-conditioning system for the occupied space, the contaminants could not be captured and the air quality in the breathing zone would become worse. Push-pull local ventilation systems consist of two components: the push flow is generated by push hood that are blown across the contaminate source towards an exhaust hood, which pulls and removes the air containing the contaminant. In this paper, a full-scale experiment in a laboratory on push-pull ventilation system is presented. The distributions of airflow and pollutant concentration were discussed with the experimental results. Several factors were investigated, i.e. the velocity of push-air and pull-air, and the locations of contaminant sources. Then a large-scale factory was modelled and simulated by CFD simulation, and the interaction between the local ventilation and the general ventilation was studied. If the displacement ventilation system was used as the general ventilation, the airflow formed in the push-pull ventilation system was not be disturbed and the capture efficiency of it was excellent.

Détails

  • Titre original : [In Japanese. / En japonais.]
  • Identifiant de la fiche : 2005-0965
  • Langues : Japonais
  • Source : Transaction of the Society of Heating, Air-conditioning and Sanitary Engineers of Japan - n. 94
  • Date d'édition : 07/2004

Liens


Voir d'autres articles du même numéro (5)
Voir la source

Indexation