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CISDOC database

Document ID (ISN)102956
CIS number 03-1796
ISBN(s) 3-86509-052-4
Year 2003
Convention or series no. Fb 1001
Author(s) Walz A.
Bundesanstalt fŘr Arbeitsschutz und Arbeitsmedizin
Title Optimization of local exhaust systems - Enhanced insights on the thermally- influenced spread of pollutants
Original title Optimierung von Einrichtungen zur Stofferfassung - Erweiterung der Erkenntnisse zur Stoffausbreitung durch Thermik [in German]
Bibliographic information Wirtschaftsverlag NW, Postfach 10 11 10, 27511 Bremerhaven, Germany, 2003. 158p. Illus. 49 ref. Price: EUR 15.00.
Abstract This report presents a methodology for designing local exhaust ventilation systems. Experimental and numerical methods for characterizing the interactions between the captured air volume flow, the spread of contaminants and unwanted air movements are reviewed. An exhaust test rig was developed, on which the numerical calculations were verified experimentally. The parameters studied included the velocity of the cross flow, the distance and vertical misalignment between exhaust system and contaminant source, the source intensity and the dimensions of the heat source. Overall eight heat and contaminant sources were investigated using up to six exhaust designs. Based on these tests, new design approaches are proposed. A practical example showing the application of this methodology is included.
Descriptors (primary) distribution of air pollutants; design of equipment; local exhaust
Descriptors (secondary) air movement; description of technique; mathematical models; convection
Document type E - Books, reports, proceedings
Country / State or ProvinceGermany
Subject(s) Heating, ventilation and climate
Broad subject area(s) Chemical safety
Browse category(ies) Ergonomics
Environmental pollution
Air pollution