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AEM - Advanced Emission Model |
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AEM (Advanced Emission Model) is an aircraft stand-alone system developed and maintained by the EUROCONTROL Experimental Centre (EEC) in Brétigny, France.
This system is used to estimate aviation emissions (CO2, H2O, SOx, NOx, HC, CO, Benzene, VOC, TOG) and fuel burn. It analyzes flight profile data, on a flight-by-flight base, for air traffic scenarios of almost any scope (from local studies around airports to global emissions from air traffic).
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- Generalities
AEM uses several underlying system databases (aircraft, aircraft engines, fuel burn rates and emission indices) provided by external data agencies in order to assure the quality of the information provided. This system information is combined with dynamic input data, represented by the air traffic flight profiles.
- References for fuel burn calculation
- Above 3000 ft: based on BADA 3.7 (Base of Aircraft Data)
- Below 3000ft: based on ICAO (International Civil Aviation Organisation)
- Concept
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- Below 3000 ft, the fuel burn calculation is based on the Landing and Take-Off Cycle (LTO) defined by the ICAO Engine Certification specifications. ICAO LTO covers four engine operation modes, modes [idle, take-off, climb-out and approach], which are used in AEM to model the six following phases of operation: taxi-out (modeled by ICAO idle), taxi-in (modeled by ICAO idle), take-off, climb-out, approach and landing (modeled by ICAO approach). The ICAO Engine Exhaust Emissions Data Bank includes emission indices and fuel flow for a very large number of aircraft engines. AEM, links each aircraft appearing in the input traffic sample to one of the engines in the ICAO Engine Exhaust Emissions Data Bank, unless actual engine is provided.
- Above 3000 ft, fuel burn calculation is based on the “Base of Aircraft Data” (BADA). This database provides altitude and attitude (i.e. climb, cruise or descent) dependent performance and fuel burn data for more than 150 aircraft types. Emission calculations are based on the ICAO Engine Exhaust Emissions Data Bank, but emission factors and fuel flow are adapted to the atmospheric conditions at altitude by using a method initially developed by The Boeing Company (The Boeing Method 2 – BM2) and modified by the EUROCONTROL Experimental Centre Business Unit Environmental Studies (EEC-BM2). EEC-BM2 allows estimation of emissions for the pollutants NOx, HC, CO.
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- Emissions
The emissions for the pollutants H2O and CO2 are produced by the oxidation process of carbon and hydrogen contained in the fuel with the oxygen contained in the atmosphere. The SOx emissions depend directly on the sulphur content of the fuel. All three are proportional to the fuel burn. Benzene emissions, as well as VOC, TOG and all pollutants derived from VOC-TOG, are proportional to the HC emissions. PM emissions result from the incomplete combustion of fuel
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If you want to access the AEM Tool, you may wish to obtain an AEM user license. To do so, please review the user agreement terms and conditions "License Agreement for the EUROCONTROL Advanced Emission Model". It is necessary that you include a detailed description of your needs for AEM. Your request will not be considered unless an accurate description of your needs is provided. Following a favourable approval of the request, you will be given access to the AEM support application where you can find the AEM application and documentation. The AEM support application is a principal communication media between the AEM licensed users and the AEM support team.
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License Agreement for AEM |
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Should you have any problems to report, or suggestions to improve the AEM Tool, you can consult our Support Service via this web site.
This website includes documentation and FAQ.
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Last validation: 25/01/2010
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