Scientists at Lawrence Livermore National Laboratory study potential of drag-reducing devices on semi-trucks to conserve billions of gallons, save tens of billions of dollars and spare tens of millions of tons of CO2
Each year, the more than 2 million tractor-trailer trucks that cruise America’s highways consume about 36 billion gallons of diesel fuel, representing more than 10 percent of the nation’s entire petroleum use. That fuel consumption could be reduced by billions of gallons a year through the use of drag-reducing devices on trucks, according to studies by researchers at Lawrence Livermore National Laboratory.
The findings will be described today in a talk at the American Physical Society’s Division of Fluid Dynamics (DFD) meeting in San Francisco, Calif. A press briefing featuring this and several other talks will be streamed live over the Web from the conference at 1:00 p.m. PST on Monday, Nov. 24 in room Foothill F of the San Francisco Marriott Marquis. For more information, email [email protected]
Fluid dynamicists Kambiz Salari and Jason Ortega ran aerodynamic tests on a detailed 1/8 scale model of a semi-truck in the wind tunnel facilities at NASA’s Ames Research Center at Moffett Federal Airfield in California. The truck was tested in various configurations. In some, it was outfitted with trailer skirts, which are panels affixed along the lower side edges of a trailer that reduce drag resulting from airflow interacting with wheels and other structures under the body of the trailer; in others, a boat tail fairing, a device affixed to the back of the trailer that decreases drag by reducing the trailer wake size, was added. In still other tests, the truck was rigged with both of the drag-reducing devices (or with neither one).
Salari and Ortega found that adding both of the devices — which are currently used in combination on about three to four percent of the nation’s semi-trucks — reduced the aerodynamic drag by as much as 25 percent, which represents about a 13 percent decrease in fuel consumption. “Even a minor improvement in a truck’s fuel economy has a significant impact on its yearly fuel consumption,” Salari said. “For example, 19 percent improvement in fuel economy, which we can achieve, translates to 6.5 billion gallons of diesel fuel saved per year and 66 million fewer tons of carbon dioxide emission into the atmosphere. For diesel fuel costing $3.96 per gallon, the savings is about $26 billion.”
The Latest on: Drag-reducing devices
via Google News
The Latest on: Drag-reducing devices
- Clinical hemorheology and microcirculationon February 16, 2020 at 4:00 pm
Cellular inflammation in pulmonary hypertension: Detailed analysis of lung and right ventricular tissue, circulating immune cells and effects of a dual endothelin receptor antagonist. Uterine ...
- You Still Can't Beat the F-22 Raptor Stealth Fighteron February 15, 2020 at 12:57 pm
Raytheon AIM-9X weapons developers have told Warrior that the Block 2 variant adds a redesigned fuze and a digital ignition safety device that enhances ground handling and in-flight ... seems to ...
- F-22 armed with more precision attack technologyon December 5, 2019 at 12:54 pm
Raytheon AIM-9X weapons developers have told Warrior that the Block 2 variant adds a redesigned fuze and a digital ignition safety device that ... radar signature and drag-reducing internal ...
- 35 Ways to Slash Your Car Costson July 30, 2019 at 2:32 am
Ask your insurer if they offer devices that monitor your driving ... If you’re worried about wind drag reducing your fuel economy, Inside Energy recommended rolling down the windows when driving ...
- Students gain research experience as automotive engineering internson July 30, 2018 at 9:44 am
Rhamy set up the control network, allowing devices to work with other sensors and CAN communication ... Supermileage vehicle to guide design decisions when the team builds a drag-reducing aerodynamic ...
- Shark Skin, 3D Printing, and Aerodynamicson February 15, 2018 at 9:46 am
Other ocean-inspired researchers have used 3D printing to improve airplanes, and there’s been a lot of research into the drag-reducing properties of shark denticles. But Lauder and the rest of ...
- Winners of Create to Educate Contest Teach Important Lessons Through 3D Printingon December 22, 2017 at 6:21 am
His lesson plan challenges students to research and design a rocket nose cone based on drag-reducing forms found in nature. He used a Formlabs Form 2 to 3D print several example nose cones.
- CPC Definition - Subclass B61Fon December 1, 2016 at 8:07 am
and air drag reducing details. Details of bogies and their connections to the vehicle underframe to improve the running characteristic of the bogie, to reduce wear of the rail and prevent derailment ...
- Sustainable growth: Railroads aim to pull more freight off the highwayon June 1, 2016 at 6:45 am
Applied rail lubrication as a way to reduce wheel-rail interface friction and aerodynamic drag-reducing devices applied at the front of double-stacked intermodal trains. Since the Crescent ...
via Bing News