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The NOx Global Prototype

The NOx Global Prototype. Ted Thrasher March 6, 2006. Overview. The Team The Objective The Approach The Result The Context for AEDT. The Team. The NOx Prototype Development Team: FAA Office of Environment and Energy (sponsor) USDOT Volpe Center ATAC Corporation CSSI, Inc.

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The NOx Global Prototype

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  1. The NOx Global Prototype Ted Thrasher March 6, 2006

  2. Overview • The Team • The Objective • The Approach • The Result • The Context for AEDT

  3. The Team • The NOx Prototype Development Team: • FAA Office of Environment and Energy (sponsor) • USDOT Volpe Center • ATAC Corporation • CSSI, Inc. • Wyle Laboratories

  4. The Objective • Develop a system for assessing aviation noise and emissions interdependencies • The 35th Session of the ICAO Assembly (A35) established 6 Strategic Objectives to “achieve its vision of safe, secure and sustainable development of civil aviation through cooperation amongst its member States” • Strategic Objective C, Environmental Protection • Minimize the adverse effect of global civil aviation on the environment, will be attained, in part, by developing, adopting, and promoting new or amended measures to: • limit or reduce the number of people affected by significant aircraft noise • limit or reduce the impact of aviation emissions on local air quality; and • limit or reduce the impact of aviation greenhouse gas emissions on the global climate • Demonstrate the ability to model the effects of imposing an emissions stringency on aircraft • Demonstrate progress toward developing a suite of tools to assess noise and emissions interdependencies

  5. The Approach • Derived schedule of operations • Baseline and future cases • Developed replacements database • Compiled an airport database • New software to • Model delays • Model aircraft performance • Model aircraft emissions • Generate reports

  6. Operations • Modified existing software to apply the FESG forecast to • Actual operations (ETMS) and • Scheduled operations (IOAG) • Resulted in a schedule of operations • For emissions, the exact aircraft/engine combination is necessary • Registration data used to determine distribution of airframe/engine combinations based on generic ETMS/IOAG types • Example: American Airlines B752 = 11% B757-200 with PW2037 engines 2% B757-200 with PW2040 engines 87% B757-200 with RB211-535E4-B engines • Origin and Destination airport information preserved • Takeoff weight estimated based on trip length

  7. Replacements Database • Fleet registration data provided aircraft age • Developed a database of aircraft replacements for future scenarios based on available FESG data

  8. Airport Database • Airport database developed with global coverage (32,000+ airports) • Key parameters for NOx Prototype • Airport elevation • Average annual temperature • Average annual pressure • Average annual humidity • Supports aircraft performance calculations • Input to Boeing Fuel Flow Method 2 for emissions • Multiple identifiers for the same airport • IOAG uses IATA (non-unique) identifier + country • ETMS uses ICAO, FAA, and IATA • Airport database was needed to resolve airport ambiguities

  9. Delay Modeling • Where airport capacity data were available, taxi-in/out times were calculated in 1-hour increments, aggregated to annual average values • Airborne arrival delays were also computed

  10. Aircraft Performance BADA Only Using SAGE SAE-AIR-1845 Performance + BADA Fuel Using EDMS

  11. Emissions Calculations • Emissions were modeled gate-to-gate • Boeing Fuel Flow Method 2 was used for computing emissions

  12. Generate Reports • A reporting module was developed to automate the report generation process • Implemented in EDMS • Accepts emissions results from SAGE and aggregates with EDMS • Output is HTML that can be copied into Excel for plotting results

  13. The Result • Comprehensive modeling demonstration • Emissions inventory for the global fleet • NOx, CO2, H2O • 2002, 2006, 2008, 2012, 2016, 2020 • 5 – 30% NOx stringencies • 3,000 feet and below, 10,000 feet and below, total flight

  14. Looking Beyond the LTO • Entire flight = 100% • LTO only captures 10% of NOx * Preliminary data. Do not cite or quote.

  15. Context for AEDT • NOx Prototype is a huge step toward a noise/emissions tradeoff capability • In the past year • Harmonized data between EDMS, INM, MAGENTA, SAGE • Airports • Fleet • Harmonized performance calculations • Harmonized emissions calculations

  16. Context for AEDT (continued) • All 4 core modules of AEDT can “talk” at some level emissions below 3k reports EDS AEDT Emissions Noise performance INM EDMS emissions above 10k weights @ 3k ops delays ops MAGENTA SAGE APMT

  17. Context for AEDT (concluded) • CDA prototype will continue the evolution toward AEDT • Distributed modules of AEDT benefit from NOx Prototype • EDMS 5.0 beta used as the NOx Prototype (below 10,000 feet) platform • INM 7 will include harmonized system tables

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