犹他州夏季重型柴油车的实际排放情况

Real-World Heavy Duty Diesel Vehicle Emissions in Utah During the SummerDarrell Sonntag and Amber AllenFEAT Overview•Fuel•Efficiency•Automobile•Test•Developed by Donald Stedman and Gary A. Bishop, University of Denver•Pollutants•Carbon dioxide (CO2)•Carbon monoxide (CO)•Gaseous hydrocarbons (HC)•Nitrogen oxides (NO+NO2)•Ammonia (NH3)•Opacity (IR absorption)•Vehicle emission rates estimated relative to fuel consumption•gramspollutant/kilogramsfuelLight SourceCalibration CylindersDetectorsSpeed and Acceleration DetectorsFEAT OverviewGary Bishop et al. (2021) observations:-Heavy Duty (HD) NOx measurements in winter in UT were higher than similar model years measured California. -HD NOx measurements were higher in UT than MOVES3 and EMFAC 2021 estimates. High v Low FEATCAMPAIGNWinter 2020Summer 2023Dates12/6/2020-12/11/20207/31/2023-8/1/2023Temperature3.6-3.9ºC (38 –39ºF)(Daily Average)24.4-32.8ºC (76 –91ºF)(Hourly Range)# of Valid ObservationsHigh FEATLow FEATLow FEAT10535381073Heavy-du