Source term back calculation

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The source term back calculation ( English Reverse Dispersion Modeling ) is a method for the calculation of emissions based on immission data .

background

Emissions from captured sources, such as chimneys , can be significantly reduced thanks to modern exhaust gas cleaning technologies, so that the importance of diffuse emissions increases. This is clear from the example of chemical and petrochemical plants, which emit about two thirds of the emissions of volatile organic compounds .

Since the point of exit, its geometry and the volume flow of diffuse emissions cannot be precisely determined, their metrological recording is fraught with difficulties. On the basis of immission data determined in the lee of the system under consideration, as well as meteorological data and with the aid of physical or mathematical modeling techniques, conclusions are drawn as to the emissions of the source to be examined. Therefore, the source term back calculation is also referred to as "inverse dispersion calculation ".

The source term back calculation is one of the indirect methods of determining emissions. It does not allow the exact determination of emissions.

literature

  • VDI 4285 sheet 1: 2005-06 Metrological determination of emissions from diffuse sources; Basics (Determination of diffusive emissions by measurement; Basic concepts). Beuth Verlag, Berlin, pp. 24-36. ( Summary and table of contents online ).

Individual evidence

  1. ↑ a b Andrea Gärtner, Rainer Hirschberger, Norbert Hölscher: Estimation of gaseous emissions from diffuse sources using FTIR and LIDAR remote measurement methods. In: Hazardous substances - cleanliness. Air . 64, No. 6, 2004, ISSN  0949-8036 , pp. 263-269.
  2. ↑ VDI 3790 sheet 1: 2015-07 environmental meteorology ; Emissions of gases, odors and dusts from diffuse sources; Basics (Environmental meteorology; Emissions of gases, odors and dusts from diffusive sources; Fundamentals). Beuth Verlag, Berlin, p. 21.
  3. ↑ VDI 4285 sheet 3: 2015-11 Metrological determination of emissions from diffuse sources; Quantification of diffusive emissions from industrial plants including agricultural sources (Determination of diffusive emissions by measurements; Quantification of diffusive emissions of fine dust from industrial plants including agricultural sources). Beuth Verlag, Berlin, p. 9.
  4. ↑ DIN EN 15445: 2008-04 Fugitive and diffuse emissions of general interest for industrial areas; Qualitative estimation of fugitive emission source strengths from immission measurements with the RDM (Reverse Dispersion Modeling) method; German version EN 15445: 2008. Beuth Verlag, Berlin, p. 4.