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Document ID (ISN)22098
CIS number 74-1899
ISSN - Serial title 0032-6291 - Pracovní lékařství
Year 1973
Convention or series no.
Author(s) Bašus V.
Title Causes of recirculation of contaminated air in spray booths
Original title Příčiny recirkulace kontaminovaného vzduchu ve stříkacích kabinách [in Czech]
Bibliographic information Oct. 1973, Vol.25, No.9, p.381-386. Illus. 1 ref.
Abstract From the results of tests on models, the reasons for abnormalities in air circulation and for the increase in concentrations of harmful substances in the working area of spray booths with ceiling ventilation are given; the flow of the air supplied through the ceiling narrows towards the centre of the booth; the vitiated air circulates along the walls, forming a turbulent zone in the breathing area. This phenomenon is due to pressure conditions in the vicinity of the air inlets as well as to convection currents forming on the wall surfaces, which have a higher temerature than that of the air in the booth. To overcome this situation, the fresh-air flow must be divided into several streams so that the walls have a fresh-air flow sweeping over them; the velocity of the air supply should also be increased. A detailed description is given of several specific cases, with appropriate solutions.
Descriptors (primary) spray coating; ventilation design; mechanical ventilation; spray booths
Descriptors (secondary) aerodynamics; tests on models; paint mist
Document type -
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Surface treatment