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Document ID (ISN)28395
CIS number 77-1901
ISSN - Serial title Cahiers de notes documentaires - Sécurité et hygiène du travail
Year 1977
Convention or series no.
Author(s) Quinot E., Aubertin G., Fruchard J.L., Roure L.
Title Removal of workplace pollutants - Comparison of the efficacy of an exhaust slot and a push-pull exhaust system
Original title Captage des polluants au poste de travail - Performances comparées d'une fente d'aspiration et d'une combinaison aspiration-soufflage. [in French]
Bibliographic information 3rd quarter 1977, No.88, Note No.1070-88-77, p.333-342. Illus. 4 ref.
Abstract First of a series of monographs to be devoted to this question. A mathematical analysis of the air flow obtained using 2 different methods (1) a built-in slot; and (2) a push-pull exhaust system with a blower slot and exhaust hood is followed by a study (also using mathematical formualae) of the relative efficacy of these 2 methods at a work surface placed against a wall or partition. Comparison of the methods shows the greater efficacy of the push-pull system in cases where the source of pollution is very localised and stationary, involving pollutant removal over short distances, whereas the combined exhaust slot with recovery hood is more efficacious in the case of a moving pollution source, involving a wider area for pollutant removal, and has the added advantage of requiring less power to operate at equal pollutant removal rates; it must, however, be carefully designed and requires careful maintenance.
Descriptors (primary) local exhaust; ventilation design; exhaust devices
Descriptors (secondary) description of equipment; experimental determination; mathematical analysis
Document type -
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Ventilation