详情

原文传递 "On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 2 ”

题名：	"On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 2 ”
作者：	Sajal S. Pokharel, Gary A. Bishop and Donald H. Stedman
关键词：	Motor Vehicle Emissions Remote Sensor Carbon Monoxide Nitrogen Oxides National Emissions Inventory Environmental Protection Agency Remote Sensing Study Hydrocarbons Ozone Atmospheric Pollutants Air Quality Standards
摘要：	The University of Denver (DU)completed die second year of a five-year remote sensing study in the Denver area. The remote sensor used in this study is capable of measuring the ratios of carbon monoxide (CO), hydrocarbons (HC) and nitrogen oxides (NO) to carbon dioxide (CO2) in motor vehicle exhaust. From these ratios, DU calculated the percent concentrations of CO, CO2, HC and NO in the exhaust that would be observed by a tailpipe probe, corrected for water and any excess oxygen not involved in combustion. Mass emissions per mass or volume of fuel can also be determined. The system used in this study was configured to determine the speed and acceleration of the vehicle, and was accompanied by a video system to record the license plates. Measurements were conducted on 4 business days in late December 1999 and early January 2000 in Denver. The measurement site was die interchange ramp from northbound I-2S to westbound 6"' Avenue in central Denver. A database was compiled containing 22,986 records for which the State of Colorado provided make and model year information. All of these records contained valid measurements for at least CO and CO2 and 22,867 contained measurements for HC and NO as well. The database, along with earlier databases and reports, can be found at www.feat.biochem.du.edu . The mean CO, HC and NO emissions for die fleet measured in this study were 0.43%, 175 ppm and 511 ppm. These values are somewhat lower than die mean emissions measured by DU at the same site in the winters of 1996 and 1997, as part of a separate study, and in 1999, except for HC, which was lower in 1999. These lower emissions can be attributed to the current fleet consisting of more modem vehicles with advanced emissions control systems.
报告类型：	科技报告