Featured Research

from universities, journals, and other organizations

Hybrid Buses Operate With Lower Emissions, Greater Fuel Efficiency

Date:
August 2, 2002
Source:
National Renewable Energy Laboratory
Summary:
A recently released study by the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) concludes that hybrid buses operate with lower emissions and greater fuel efficiency than conventional diesel buses.

A recently released study by the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) concludes that hybrid buses operate with lower emissions and greater fuel efficiency than conventional diesel buses.

The year long evaluation of 10 prototype diesel hybrid-electric buses in the Metropolitan Transportation Authority's New York City Transit (NYCT) fleet of 4,489 buses showed that these hybrid buses have a 10 percent higher in-service fuel economy. According to chassis dynamometer emissions testing, the hybrid buses had 36 percent lower oxides of nitrogen and 50 percent lower particulate matter emissions than diesel buses on a central business district cycle.

"Taking the state of the technology into consideration, we think hybrid-electric buses are going to make a very positive impact on our fleet," said Bill Parsley, NYCT's director of research and development. NYCT has awarded contracts for an additional 125 hybrid buses in 2002 and 200 hybrid buses in 2003.

The NREL report, NYCT Diesel Hybrid-Electric Buses: Final Results, summarizes the work completed during the yearlong Transit Bus Evaluation Project to collect fueling, maintenance, performance and emission data from NYCT.

While the hybrid buses have greater fuel economy than diesel buses, maintenance costs were significantly higher due in part to the maturity level of the hybrid propulsion system. These costs are expected to drop as the technology advances.

The evaluation was funded by DOE's Office of Heavy Vehicle Technologies and Office of Technology Utilization's Field Operations Program and managed by NREL. It began after NYCT purchased the prototype diesel hybrid-electric buses from Orion Bus Industries with BAE SYSTEMS' HybriDriveTM propulsion system after the success of an early prototype hybrid bus project.

The final results report and two additional reports related to this Transit Bus Evaluation Project, NYCT Diesel Hybrid-Electric Buses: Program Status Update and NYCT Diesel Hybrid-Electric Buses: Final Data Report, are available through NREL's Alternative Fuels Data Center, http://www.afdc.doe.gov or 1-800-423-1DOE.


Story Source:

The above story is based on materials provided by National Renewable Energy Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

National Renewable Energy Laboratory. "Hybrid Buses Operate With Lower Emissions, Greater Fuel Efficiency." ScienceDaily. ScienceDaily, 2 August 2002. <www.sciencedaily.com/releases/2002/08/020802074242.htm>.
National Renewable Energy Laboratory. (2002, August 2). Hybrid Buses Operate With Lower Emissions, Greater Fuel Efficiency. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2002/08/020802074242.htm
National Renewable Energy Laboratory. "Hybrid Buses Operate With Lower Emissions, Greater Fuel Efficiency." ScienceDaily. www.sciencedaily.com/releases/2002/08/020802074242.htm (accessed September 30, 2014).

Share This



More Matter & Energy News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Argentina's Tax Evaders Detected, Hunted Down by Drones

Argentina's Tax Evaders Detected, Hunted Down by Drones

AFP (Sep. 30, 2014) Argentina doesn't only have Lionel Messi the footballer, it has now also acquired "Mesi" the drone system which monitors undeclared mansions, swimming pools and soy fields to curb tax evasion in the country. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Do Video Games Trump Brain Training For Cognitive Boosts?

Do Video Games Trump Brain Training For Cognitive Boosts?

Newsy (Sep. 29, 2014) More and more studies are showing positive benefits to playing video games, but the jury is still out on brain training programs. Video provided by Newsy
Powered by NewsLook.com
CERN Celebrates 60 Years of Science

CERN Celebrates 60 Years of Science

Reuters - Business Video Online (Sep. 29, 2014) CERN, the European Organisation for Nuclear Research, celebrates 60 years of bringing nations together through science. As Joanna Partridge reports from inside the famous science centre it's also planning to turn the Large Hadron Collider particle accelerator back on after an upgrade. Video provided by Reuters
Powered by NewsLook.com
This 'Invisibility Cloak' Is Simpler Than Most

This 'Invisibility Cloak' Is Simpler Than Most

Newsy (Sep. 28, 2014) Researchers from the University of Rochester have created a type of invisibility cloak with simple focal lenses. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins