Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Humidity on Heavy-Duty Transient Emissions from Diesel and Natural Gas Engines at High Altitude
The Code of Federal Regulations (CFR 40 Part 86 Subpart N) defines a universal humidity correction for NOx emissions from heavy–duty diesel and alternative fueled engines measured by the heavy–duty transient test. This testing procedure and humidity correction apply to any heavy–duty engine subject to regulation of particulate matter emissions, including spark ignited engines. This correction has been evaluated for a 1988 Detroit Diesel Series 60 engine and a 1995 Cummins B5.9G natural gas engine. The correction at high altitude for the diesel engine is in excellent agreement with the correction published in the Code of Federal Regulations. In addition, humidity is found to affect particulate matter in agreement with the Engine Manufacturers Association correction factor. This suggests that these results, acquired at high altitude, are generally applicable to all altitudes. CO emissions are also correlated with humidity. Emission traces show that humidity affects NOx uniformly for the diesel engine. A modification to the CFR correction method to allow accounting for the effect of humidity changes during the transient test on NOx emissions is proposed. The NOx correction factor for the natural gas engine is much more significant than for the diesel engine. Total hydrocarbon, principally methane, also correlates with humidity. The development of a natural gas correction, rather than the CFR diesel correction, for NOx and hydrocarbon emissions is suggested.
Effect of Humidity on Heavy-Duty Transient Emissions from Diesel and Natural Gas Engines at High Altitude
The Code of Federal Regulations (CFR 40 Part 86 Subpart N) defines a universal humidity correction for NOx emissions from heavy–duty diesel and alternative fueled engines measured by the heavy–duty transient test. This testing procedure and humidity correction apply to any heavy–duty engine subject to regulation of particulate matter emissions, including spark ignited engines. This correction has been evaluated for a 1988 Detroit Diesel Series 60 engine and a 1995 Cummins B5.9G natural gas engine. The correction at high altitude for the diesel engine is in excellent agreement with the correction published in the Code of Federal Regulations. In addition, humidity is found to affect particulate matter in agreement with the Engine Manufacturers Association correction factor. This suggests that these results, acquired at high altitude, are generally applicable to all altitudes. CO emissions are also correlated with humidity. Emission traces show that humidity affects NOx uniformly for the diesel engine. A modification to the CFR correction method to allow accounting for the effect of humidity changes during the transient test on NOx emissions is proposed. The NOx correction factor for the natural gas engine is much more significant than for the diesel engine. Total hydrocarbon, principally methane, also correlates with humidity. The development of a natural gas correction, rather than the CFR diesel correction, for NOx and hydrocarbon emissions is suggested.
Effect of Humidity on Heavy-Duty Transient Emissions from Diesel and Natural Gas Engines at High Altitude
McCormick, R.L. (Autor:in) / Graboski, M.S. (Autor:in) / Newlin, A.W. (Autor:in) / Ross, J.D. (Autor:in)
Journal of the Air & Waste Management Association ; 47 ; 784-791
01.07.1997
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Idle Emissions from Heavy-Duty Diesel and Natural Gas Vehicles at High Altitude
| Taylor & Francis Verlag | 2000
| Taylor & Francis Verlag | 2015
Factors Affecting Heavy-Duty Diesel Vehicle Emissions
| Taylor & Francis Verlag | 2002
Effects of Engine Speed and Accessory Load on Idling Emissions from Heavy-Duty Diesel Truck Engines
| Taylor & Francis Verlag | 2002