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Idle Reduction Technology * USA - Research Sheds Light on APU Decisions
Raleigh,NC,USA -TruckingInfo -5 Nov 2008: -- The NC Solar Center at North Carolina State University in Raleigh wrapped up a three-year, $500,000 project funded by the U.S. Environmental Protection Agency that focused on developing mobile idle reduction technology to reduce idling of long haul trucks... Volvo Trucks collaborated with three technology providers to develop two auxiliary power units that were used by two fleets. Each truck was outfitted by Volvo with sensors that were remotely monitored by NCSU researchers to assess the use and performance of the APUs. The 20 trucks participating in the field demonstration operated for over 2.8 million miles in 42 states during the 16-month data collection period... Researchers concluded that the fuel-savings and emissions benefits that are widely touted for APUs may be optimistic. Avoided annual average fuel use and CO2 emissions for all stops were 22 and 5 percent for Fleets A and B, respectively, which are lower than literature estimates of 50 to 80 percent. At mild temperatures, 100 percent substitution of APU usage instead of the base engine would lead to an 80 to 90 percent reduction in NOx emissions, 36 to 47 percent reduction in CO2 emissions and fuel use, and 10 to 25 percent reduction in PM emissions... However, the field data imply that the APU was used by single drivers for an average of 59 percent of idling and by team drivers participating in the demonstration for an average of only 25 percent of idling...
Labels: idle reduction technology
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