Aviation and Environment: Certification and Tendencies 2007-01-2592
Recently, phenomena as Greenhouse Effects, Global Warming and Environmental Changes are being discussed more and more around the World, forcing the humanity to think and provide means capable to preserve the human life and the animal and vegetal biodiversity.
Gases emissions have different sources and the contribution of each economical sector on the total amount of pollutants emitted to the atmosphere varies according to each country and time frame. In industrialized countries, transportation represents around 33% of total CO2 emissions being 12% due to air transportation (4% of total). Although relatively small, this contribution may increase significantly in the near future, if the estimative for air transportation growth is confirmed (3.5% increase per year, between 2000 and 2030). Based on these facts, major aircraft manufacturers and ICAO (International Civil Aviation Organization), through its CAEP (Committee on Aviation Environmental Protection), have being working to deeply understand the problem and find viable solutions that address environmental protection, life preservation and economical aspects at the same time. In this context, this paper describes the current aircraft emission certification requirements for pollutants as CO, NOx, Smoke and HC, including the limits applicable to each engine thrust levels. Certification tendencies (including more stringent emissions standards) being discussed by the international community are also presented.