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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

The NOx Global Prototype

Ted Thrasher

March 6, 2006


Overview
Overview

  • The Team

  • The Objective

  • The Approach

  • The Result

  • The Context for AEDT


The team
The Team

  • The NOx Prototype Development Team:

    • FAA Office of Environment and Energy (sponsor)

    • USDOT Volpe Center

    • ATAC Corporation

    • CSSI, Inc.

    • Wyle Laboratories


The objective
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


The approach
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


Operations
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


Replacements database
Replacements Database

  • Fleet registration data provided aircraft age

  • Developed a database of aircraft replacements for future scenarios based on available FESG data


Airport database
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


Delay modeling
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


Aircraft performance
Aircraft Performance

BADA Only

Using SAGE

SAE-AIR-1845 Performance +

BADA Fuel Using EDMS


Emissions calculations
Emissions Calculations

  • Emissions were modeled gate-to-gate

  • Boeing Fuel Flow Method 2 was used for computing emissions


Generate reports
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


The result
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


Looking beyond the lto
Looking Beyond the LTO

  • Entire flight = 100%

  • LTO only captures 10% of NOx

* Preliminary data. Do not cite or quote.


Context for aedt
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


Context for aedt continued
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


Context for aedt concluded
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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