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CISDOC database

Document ID (ISN)34630
CIS number 80-1853
Year 1979
Convention or series no.
Author(s) Allander C., Ljungqvist B.
Title Air movements - the dispersion of pollution. Exploratory tests using IR techniques.
Bibliographic information Document D16:1979, Svensk Byggtjänst, Box 7853, 103 99 Stockholm, Sweden, 1979. 8p. Illus. 2 ref. Price: Swe-cr. 20.00.
Abstract A method comparable to smoke photography which shows up gas accumulations rather than smoke particles is described. Use was made of the fact that most gases and vapours of interest to occupational hygiene have dipole moments in their molecular structure, so that they have absorption lines within the infrared region. The test apparatus is described and early test results are given. Sensitivity appeared to be of the order of 100ppm/cm, using primitive experimental conditions. The dynamic process of dispersal of gas was also filmed: different colours corresponded to different extinction values. The wake of a person working at a fume cupboard can give rise to extensive release of gas from the cupboard even when work is performed with the door half closed.
Descriptors (primary) air movement; harmful substances; infrared thermography; ventilation; aerosols
Descriptors (secondary) description of equipment; description of technique; ventilation design
Document type E - Books, reports, proceedings
Subject(s) Dust, aerosols and related diseases
Broad subject area(s)
Browse category(ies) Ventilation