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The Korean Railroad Research Institute (KRRI) is overseeing installation of an ultracapacitor-based braking energy recuperation system in a subway station to understand the system’s benefits.

David Schramm, Maxwell’s president and chief executive officer, said that Woojin Industrial Systems, KRRI’s contractor for the project, selected Maxwell’s 48V Boostcap ultracapacitor modules as the recuperation system’s energy storage element.

Earlier this year, Woojin took delivery of 72 modules and completed installation of a 750V DC system for testing and evaluation on the Gyengsan light rail transit track.

Maxwell delivered another 220 modules to Woojin in October for a 1500V DC system that will be installed during the second quarter of 2009, with system demonstrations set to follow.

In the Gyengsan light rail installation, preliminary testing conducted by KRRI and Woojin during system development projected that the recuperation system would reduce grid power consumption by more than 20 per cent.

If this is matched in actual operation it could save enough energy to recoup the initial investment in less than four years.

Boostcap ultracapacitor products deliver up to 10 times the power and longevity of batteries, require no maintenance and operate reliably in extreme temperatures.

In transportation applications, they recapture energy from braking for reuse in hybrid and all-electric drive trains, reducing energy consumption and emissions.

They also provide compact and lightweight solutions to stabilise automotive power networks and power new all-electric subsystems, such as drive-by-wire steering.

In mission-critical industrial applications, where back-up power ensures continued operation or a soft shutdown in the event of power interruptions, ultracapacitors provide reliable energy storage.

In wind turbine blade pitch and braking systems and other industrial applications, they provide a reliable solid-state solution to buffer short-term mismatches between the power available and the power required.

Maxwell Technologies

Maxwell is a leading developer and manufacturer of innovative, cost-effective energy storage and power delivery solutions. As a leader in the ultracapacitor technology, Maxwell Technologies is helping to change the way energy is stored all over the world.  

Maxwell’s BOOSTCAP(R) ultracapacitor cells and multi-cell packs and modules provide safe and reliable power solutions for applications in consumer and industrial electronics, transportation, renewable energy and telecommunications.  

Available in a range of sizes and modular configurations, Maxwell’s BOOSTCAP(R) products bring new levels of efficiency and power to everything from consumer electronics to hybrid cars and renewable energy sources.

Maxwell’s proprietary electrode and global manufacturing facilities allow to deliver unsurpassed value, keeping costs down while tailoring performance to specific applications. Maxwell’s ultracapacitors have a demonstrated lifespan of one million recharge cycles even in extreme environments, or 10 years DC-lifetime at room temperature reducing maintenance costs and adding value to other power sources.

Numerous benefits and countless applications.

  • Reliable operation in harsh environments
  • Virtually maintenance free
  • Tailored solutions
  • Competitively priced
  • Exceptional efficiency
  • Compact design
  • Extended operating life
  • Environmentally safe

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