|Document ID (ISN)||102956|
|Convention or series no.
Bundesanstalt fŘr Arbeitsschutz und Arbeitsmedizin
||Optimization of local exhaust systems - Enhanced insights on the thermally- influenced spread of pollutants
||Optimierung von Einrichtungen zur Stofferfassung - Erweiterung der Erkenntnisse zur Stoffausbreitung durch Thermik [in German]|
||Wirtschaftsverlag NW, Postfach 10 11 10, 27511 Bremerhaven, Germany, 2003. 158p. Illus. 49 ref. Price: EUR 15.00.
||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.
||distribution of air pollutants; design of equipment; local exhaust
||air movement; description of technique; mathematical models; convection
||E - Books, reports, proceedings
|Country / State or Province||Germany|
||Heating, ventilation and climate
|Broad subject area(s)