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Document ID (ISN)68422
CIS number 97-156
ISSN - Serial title 0007-9952 - Cahiers de notes documentaires - Hygiène et sécurité du travail
Year 1996
Convention or series no.
Author(s) Régnier R., Dessagne J.M., Bonthoux F., Aubertin G.
Title Surface treatment tanks - Exhaust performance of slots
Original title Cuves de traitement de surface - Performance de captage de fentes d'aspiration [in French]
Bibliographic information 4th Quarter 1996, No.165, Note No.2030-165-96, p.425-441. Illus. 12 ref.
Internet access http://www.inrs.fr/htm/cuves_traitement_surface_performance_captage.html [in French]
Abstract An experimental study was carried out to determine the exhaust performances of lateral exhaust slots on surface treatment tanks. Full-scale models of different width/length ratios were tested in a wind tunnel simulating controlled air draught intensity and direction in an exhaust flowrate range covering the values generally recommended. The implementation of the recommendations of the INRS Practical Ventilation Guide leads in the case of a unilateral slot to efficiencies ranging from almost 100% to 60%, depending on the global risk level under consideration. These results apply with antagonistic air draught of 0.5m/s. To maintain the performances, the exhaust rate must be modulated in proportion with air draught intensity. The direction of air draught is also very important. The lesser sensitivity of the bilateral slot solution to air draughts was clearly demonstrated, and this is the only suitable solution for the largest tanks when the efficiency target is over 95%.
Descriptors (primary) vats; exhaust ventilation; ventilation; collection efficiency
Descriptors (secondary) surface coating; description of technique; rim exhaust; evaluation of equipment
Document type D - Periodical articles
Country / State or ProvinceFrance
Subject(s) Heating, ventilation and climate
Broad subject area(s) Chemical safety
Browse category(ies) Ventilation