TY  - JOUR
AU  - Gnendiger, Christoph
AU  - Schultze, Thorsten
AU  - Börger, Kristian
AU  - Belt, Alexander
AU  - Arnold, Lukas
TI  - Extinction coefficients from aerosol measurements
JO  - Fire safety journal
VL  - 146
SN  - 0378-7761
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2024-01606
SP  - 104110 -
PY  - 2024
AB  - In this contribution, we develop a model that describes light extinction in the presence of arbitrary aerosols. In doing so, we take advantage of the fact that during measurements with the ELPI+-system, aerosol particles of any shape are internally mapped to spherical surrogates. The developed model is particularly simple and depends on only a few parameters, namely on densities and refractive indices of the measured aerosol particles. As proof of principle, the model is in first applications used to determine extinction coefficients and mass-specific extinction for an infrared light source with a peak wave length of 880 nm. Detailed studies concentrate on two aerosols exemplary for characteristic values of the input parameters: a paraffin aerosol in a bench-scale setup and soot from a flaming n-heptane fire in a room-scale setup (test fire TF5 according to EN54). As main results, we find values for mass-specific extinction that are different in the considered cases. Moreover, obtained results differ in part more than a factor of three from literature values typically used in practical applications. We explicitly assess reasons for deviations found and finally propose a simple way how future light-extinction studies can be performed comparatively easily using the ELPI+-system.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001199438400001
DO  - DOI:10.1016/j.firesaf.2024.104110
UR  - https://juser.fz-juelich.de/record/1023023
ER  -