Research Needs Associated with Particulate Emissions at Airports (2008) / Chapter Skim
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• Airport facility equipment emissions are often defined by EPA standards. Emission factors for stationary sources can be found in a variety of sources, most commonly from AP-4222 and Air Quality Procedures for Civilian Airports and Air Force Bases (The Air Quality Handbook)
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From page 20... ...
APUs are essentially small jet engines and it is expected their emissions would be similar to those of the aircraft main engines; however, APU have different operating cycles. They typically operate at three power settings: no load, environmental control condition,24 and engine start condition.25 • Fuel consumption for APUs is unknown, however, they use much less fuel than the main aircraft engines, and their emissions are expected to be proportionately less.
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