Influence of Push Element Geometry on the Capture Efficiency of Push–Pull Ventilation Systems in Surface Treatment Tanks | Zendy

F. Marzal | Zendy; Erick Gonzalez | Zendy; A. Miñana | Zendy; A. Baeza | Zendy

Open Access

Influence of Push Element Geometry on the Capture Efficiency of Push–Pull Ventilation Systems in Surface Treatment Tanks

Author(s) -

F. Marzal,

Erick Gonzalez,

A. Miñana,

A. Baeza

Publication year - 2002

Publication title -

the annals of occupational hygiene

Language(s) - English

Resource type - Journals

eISSN - 1475-3162

pISSN - 0003-4878

DOI - 10.1093/annhyg/mef048

Subject(s) - ventilation (architecture) , push pull , range (aeronautics) , materials science , structural engineering , mechanics , engineering , mechanical engineering , composite material , physics , electrical engineering

A full-scale installation which simulates a surface treatment tank provided with a push-pull ventilation system has been designed. This study examines the influence of the geometry of the push element on the capture efficiency of the system. It is observed that: (i) capture efficiency increases with the number of holes because of the continuous curtain formed, the size of the holes having no significant effect within the range studied (5-20 mm diameter); (ii) the push element is best supported on the tank wall so that no air from outside penetrates below the emitting jets because in this way the impact of the curtain on the tank occurs earlier and losses are less; (iii) the best results are obtained when the holes are directed downwards towards the tank surface at an angle of between 22 and 45 degrees.

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