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EMISSIONS AND AVIATION. Embraer Overview 2007. Sep.07. Contents. Aviation and the Environment Embraer Roadmap. Aviation’s Emissions Today. Aviation is responsible for 12\% of total transport CO 2 emissions. Road transport generates 76\% according to the Stern Review*.

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Presentation Transcript
contents
Contents
  • Aviation and the Environment
  • Embraer Roadmap
aviation s emissions today
Aviation’s Emissions Today

Aviation is responsible for 12% of total transport CO2 emissions.

Road transport generates 76% according to the Stern Review*.

* Stern Review Annex 7c

emissions efficiency evolution along time
Emissions Efficiency Evolution Along Time
  • Aviation boasts occupancy rates above 70%, more than double the rate for road and rail transportation.
  • In the past 40 years, aviation hydrocarbon emissions have been reduced by 90%.
  • In the past 15 years, nitrogen oxides (NOx) generated by aircraft engines have been reduced by 50%.

Source: www.enviro.aero

emissions contribution by aircraft size
Emissions Contribution by Aircraft Size

Commercial aircraft with less than 110 seats are responsible for 9% of total aviation or 0.26% of global CO2 emissions.

Global Emissions 2006

Aviation Emissions 2006

*References: FleetPC 31Dec2006; NBAA Industry Statistics; NASA Report Scheduled Civil Aircraft Emission Inventories for 1999.

short term actions fleet renewal
Short Term Actions – Fleet Renewal

20% Lower Emissions by Replacing Old jets* by New 70-100 Seaters

-20% Emissions

*Study considers direct replacement of the entire fleet of BAe146-100/200/300, RJ70/85/100, B737-200/500, F70/100, DC9-30, MD87 by the the E-Jet with similar capacity.

new technologies
New Technologies

Technologies can further reduce Emissions:

  • Aerodynamics:
  • CFD
  • MDO
  • Wing/Fuselage Design
  • Alternative Fuels:
  • Biokerosene

LIFT

(aerodynamic)

F U T U R E A I R C R A F T

DRAG

(aerodynamic)

TRUST

(propusion efficiency)

  • Advanced Systems:
  • More Electric
  • Advanced Avionics and Flight Control
  • Advanced Structures:
  • Composites
  • Metallic
  • Advanced Materials

WEIGHT

(structural efficiency)

design trade offs
Design Trade-offs

Trade-offs are inevitable. Targets for new regulations must consider definition of priorities.

  • Bigger engines requires higher pressure ratios
  • Higher engine pressure ratio and bypass ratio reduces:
    • Fuel burn (CO2)
    • Reduces Noise (lower exhaust jet velocity).
  • Higher pressure ratio results higher flame temperature
    • Reduces CO & HC
    • Increases NOx

Figure extracted from CAEP SG Emissions Workshop, 9 September 2002

Presentation “Technology Transition” - W. Dodds/H.Aylesworth

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