Rail

Maxwell, AMT to equip TriMet rail with energy saving tech

Posted on April 24, 2013

Maxwell Technologies Inc. is supplying ultracapacitors for an energy-saving braking energy recuperation system that American Maglev Technology (AMT) is installing on light rail vehicles operated by the Portland, Ore.-based Tri-County Metropolitan Transportation District (TriMet).

TriMet won a $4.2 million grant from the FTA's Transit Investment for Greenhouse Gas and Energy Reduction (TIGGER) program to improve the efficiency of its fleet of 101 light rail vehicles equipped with regenerative braking after determining that the vehicles were able to use only about 70% of the energy generated by braking.

In regenerative braking systems, the electric motor that propels an electric or hybrid vehicle also does most of the braking. When the brakes are applied, instead of employing a conventional friction-based braking process, the system signals the electric motor to run in reverse mode, creating resistance to slow the vehicle. An electric motor running backwards also acts as an electric energy generator or dynamo that converts the kinetic energy of motion into electrical energy that can be stored for reuse, improving efficiency.

In TriMet's system, energy generated by decelerating vehicles is fed into the traction electrification system for use by other vehicles on the system. TriMet is using the TIGGER funding to retrofit 27 vehicles with the American Maglev-designed, ultracapacitor-based, energy storage system, which captures and stores regenerative braking energy as it is generated, uses the stored energy for acceleration and releases surplus energy to other vehicles on the system as needed. The 27 retrofitted vehicles are being paired with non-capacitor-equipped vehicles so that stored energy can be used by both vehicles.

To measure and validate anticipated energy savings, TriMet will compare in-service energy consumption data collected by on-board vehicle propulsion computers before and after the retrofit. According to a bulletin published by the FTA and prepared by the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), preliminary data collected by TriMet indicate the roof-mounted ultracapacitor-based energy storage systems will result in annual energy savings of approximately 2.8%.

"The use of Maxwell's ultracapacitors in our Energy Storage Systems has resulted in unprecedented energy savings as we strive to make light rail vehicles greener and more energy efficient," said Tony J. Morris , the president/CEO of AMT. "We see this as a new, enabling, sustainable technology that can be applied in many other transportation environments."

"With their ability to charge and discharge in as little as fractions of a second, ultracapacitors are highly efficient in capturing energy generated during braking events that last only a few seconds and then quickly releasing stored energy as needed for acceleration," said David Schramm, Maxwell's president/CEO. "In addition to this and other rail installations, fuel-efficiency and emission-reduction benefits are being realized by more than 10,000 Maxwell ultracapacitor-equipped hybrid-electric transit buses in daily operation around the world."

View comments or post a comment on this story. (0 Comments)

More News

Atlanta Streetcar names new leadership

Keith Jones, formerly of URS Corp., will serve as interim executive director, while Ozell Hayes will serve as interim director for safety, security and training.

FRA finds Amtrak at fault for violating ADA passenger's rights

According to the agency, the train station lacks required public telephone technology for people who are deaf or hard of hearing; does not provide a visual information system for passengers waiting outside on platforms to update them about delays and schedule changes.

Valley Metro expands 'Safe Place' program at 4 new light rail stations

Valley Metro’s partnership with Safe Place began in 2013. Teens that are homeless, have left their homes because of abuse or neglect, or have been asked to leave by parents or guardians can seek help at any light rail station 24-hours a day.

Bombardier's joint venture to build 15 high speed trains for China

The contract for 15 eight-car CRH380D trainsets is valued at approximately 2.4 billion Chinese RMBs ($381 million U.S., 339 million euro).

MBTA needs $7.3B to repair rail system

The backlog could be wiped out by 2040 if the T spends $765 million annually on the maintenance backlog — rather than the current $610 million.

See More News

Post a Comment

Post Comment

Comments (0)

More From The World's Largest Fleet Publisher

Automotive Fleet

The Car and truck fleet and leasing management magazine

Business Fleet

managing 10-50 company vehicles

Fleet Financials

Executive vehicle management

Government Fleet

managing public sector vehicles & equipment

TruckingInfo.com

THE COMMERCIAL TRUCK INDUSTRY’S MOST IN-DEPTH INFORMATION SOURCE

Work Truck Magazine

The resource for managers of class 1-7 truck Fleets

Schoolbus Fleet

Serving school transportation professionals in the U.S. and Canada

LCT Magazine

Global Resource For Limousine and Bus Transportation

Please sign in or register to .    Close