Pentadyne wins flywheel energy recycling project in New York City

Chatsworth, Calif., August 14, 2009 – Pentadyne Power Corp., a flywheel energy storage systems maker, is supplying a 2.4 MW energy recycling system to the Metropolitan Transit Authority of New York. The system will be used to capture, store and reuse braking energy of trains on a station of the Long Island Railroad.

The MTA oversees all of New York City’s world-renowned subways, commuter trains and buses. It is North America’s largest transit authority, providing 2.6 billion passenger trips each year — the equivalent of about one in every three users of mass transit in the United States and two-thirds of the nation’s rail riders.

The pilot project has major financial support from the New York Power Authority, which selected Pentadyne as the supplier.

The project will involve an array of sustainable, environmentally responsible carbon-fiber flywheel systems that capture and store braking energy from slowing trains, then reuse that energy for acceleration.

The concept is similar to that used by hybrid cars, but the hazmat-free flywheel technology is more and energy efficient than the chemical batteries used in hybrid cars.

The NYCMTA and NYPA thoroughly evaluated a variety of flywheels, chemical ultracapacitor systems and batteries for this new project. They selected Pentadyne to provide a new and improved high-duty-cycle flywheel system based on a demonstration system that exceeded expectations in extensive NYCMTA tests performed several years ago.

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The Clarion Energy Content Team is made up of editors from various publications, including POWERGRID International, Power Engineering, Renewable Energy World, Hydro Review, Smart Energy International, and Power Engineering International. Contact the content lead for this publication at

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