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Nitrous Oxide Emission Factors for Mobile Sources

机译:移动源的一氧化二氮排放因子

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To help determine emissions factors for nitrous oxide from gasoline mobile sources for the U.S. inventory of greenhouse gases, 23 vehicles (18 Tier ls, 4 LEVs, and 1 Tier 0) were tested on four driving schedules (FTP, US06, HR505, and LOS-AC). Most tests were run using a standard commercial fuel (285 ppm sulfur) and were repeated with air conditioning (AC) off at 75℉ and on at 95℉. For some vehicles, these tests were repeated using certification fuel (24 ppm sulfur). Average FTP composite emission factors were 46 mg/mi for 12 Tier 1 passenger vehicles (cars plus minivans), 109 mg/mi for five Tier 1 light-duty trucks, and 28 mg/mi for four LEVs. The FTP driving schedule resulted in the highest emissions of those driving cycles tested. Tests of both fuels on five vehicles showed higher nitrous oxide emissions with the higher sulfur fuel. AC-on produced some increases and some decreases of emissions. Inter-vehicle variability was too large to detect a significant effect of mileage on emissions. Nitrous oxide emissions from mobile sources were about 1% of U.S. greenhouse gas emissions in 1996.
机译:为了帮助确定用于美国温室气体清单的汽油移动源中的一氧化二氮的排放因子,在四种驾驶时间表(FTP,US06,HR505和LOS)中测试了23辆汽车(18层,4列LEV和1层0列) -AC)。大多数测试都是使用标准的商用燃料(硫含量为285 ppm)进行的,并在空调(AC)为75°时和95°为开的条件下重复进行。对于某些车辆,使用认证燃料(24 ppm硫)重复进行这些测试。 12层一级乘用车(轿车加小型货车)的平均FTP复合排放因子为46 mg / mi,五辆1层轻型卡车为109 mg / mi,四辆LEV为28 mg / mi。 FTP驾驶计划导致了所测试的那些驾驶循环中排放量最高。在五辆车上对两种燃料的测试均显示,一氧化二氮排放量较高,而硫燃料含量较高。 AC-on产生了一些排放量的增加和减少。车辆间的差异太大,无法检测到行驶里程对排放的重大影响。移动源产生的一氧化二氮排放量约为1996年美国温室气体排放量的1%。

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