AirWare On-line Reference Manual
| | Release Level | 5.4 |
| | Release Date | 2008 10 |
| Revision Level | 1.0 |
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Last modified on:
Monday, 20-Jul-09 14:03 CEST
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GHG emission inventories
AirWare maintains a set of emission inventories as OBJECT CLASSES
in the OBJECT DATA BASE with a
class specific selector/navigator for Area Sources, Boilers, Industrial Plants, Line Sources, and Small
Stacks (default alphabetical order in the OBJECT ClassList;
For GReenhouse gases (GHG) the emisison inventories for "classical" air polutants
are extended to
- include additional source classes, based a more process oriented classification;
- include additional subtances, primarily CO2 and Methane.
Data structures and attributes
All emission sources are OBJECTs and have the standard OBJECT META DATA associated
that include:
- name, short descriptiopn, owner, creation and last modification date;
- georeference: symbolic and (type specific, reference point, polygon, line segment);
- Hypertext description (with import function);
- Type specific attributes (Descriptors);
- source specific temporal scaling factors (for month, day, hour)
- a TABLE of substance specific average emission values;
- optional one or more substance (or parameter) specific temporal scaling factors;
- optional time series of emission values (include emission temperature and speed for
industrial stacks), and related parameters, with import function.
The emisison inventory covers either
- a spatial/geographical aggregation concept
- a fuynctional/organisational aggregation concept.
- CO
- SO2
- NOx (possibly NO, NO2, or with an NO/NO2 ratio)
- PM-10
- PM-2.5
- VOC
The latter group is broken into a number of sub-groups or species,
based on a speciation table that can be associated with any source class, type, or individual source.
The global default speciation table includes:
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TOG (Total Organic Gases) is calculated from VOC:
TOG = factor*VOC (default: factor=1); values above one
represent the Methane fraction.
The mass speciation factors for TOG are defined in the
default profile (#0) which can be overloaded by
emission source class, type, and individual source.
(Source: http://www.epa.gov/ttn/chief/emch/speciation/)
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| ALD2 | Higher Aldehyde, based on Acetaldehyde | 0.02 |
| ETH | Ethene | 0.05 |
| FORM | Formaldehyde | 0.02 |
| OLE | Olefin carbon bond C=C | 0.05 |
| PAR | Paraffin carbon bond C-C | 0.49 |
| TOL | Toluene and other monoalkyl aromatics | 0.05 |
| XYL | Xylene and other polyalkyl aromatics | 0.04 |
| NR | non reactives | 0.28 |
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