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原文传递 Operational Evaluation of Emissions and Fuel Use of B20 Versus Diesel Fueled Dump Trucks.

题名：	Operational Evaluation of Emissions and Fuel Use of B20 Versus Diesel Fueled Dump Trucks.
作者：	frey, h. c. kim, k.
关键词：	biodiesel, heavy duty vehicles, diesel engines, petroleum, fuel use, nitrogen oxides, carbon monoxide, hydrocarbons, particulate matter, carbon dioxide, evaluation, north carolina
摘要：	Diesel vehicles contribute substantially to statewide emissions of NOx, an ozone precursor, and to particulate matter. NCDOT is conducting a pilot study to demonstrate the use of B20 biodiesel fuel on approximately 1,000 vehicles in selected areas of the state; there are plans to extend the use of B20 fuel to a much larger number of vehicles in all 100 counties in North Carolina. Real-world in-use on-road emissions of selected heavy duty diesel vehicles, including those fueled with B20 biodiesel and petroleum diesel, were measured during normal duty cycles using a portable emissions measurement system (PEMS). Four categories of dump trucks were selected for testing, including: (1) single rear axle with Tier 1 engines; (2) single rear axle with Tier 2 engines; (3) tandems with Tier 1 engines; and (4) tandems with Tier 2 engines. A total of 12 vehicles were tested. Each vehicle was tested for one day on B20 biodiesel and for one day on petroleum diesel, for a total of 24 days of field measurements. The vehicles were operated by drivers assigned by NCDOT. Each test was conducted over the course of an entire workshift, and on average there were 4.5 duty cycles per shift. Each duty cycle is comprised of a uniquely weighted combination of nine operating modes (idle, three levels of acceleration, three levels of cruise, deceleration, and dumping). Average emission rates on a mass per time basis varied substantially among the operating modes. / NOTE: Final rept. (July 2003 - Dec. 2004). / Supplementary Notes: Sponsored by Department of Transportation, Washington, DC. Research and Special Programs Administration. and Federal Highway Administration, Raleigh, NC. North Carolina Div. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
报告类型：	科技报告