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General information
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General criteria
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Environmental criteria
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Impacts on energy efficiency:
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Energy efficiency potential for single vehicle: > 10% |
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Energy efficiency potential throughout fleet: (no data) |
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Other environmental impacts: neutral |
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Economic criteria
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Vehicle - fix costs: high |
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Vehicle - running costs: significant reduction |
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Infrastructure - fix costs: none |
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Infrastructure - running costs: unchanged |
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Scale effects: low |
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Amortisation: > 5 years |
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Application outside railway sector
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Overall rating
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Overall potential: promising |
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Time horizon: long-term |
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Fly-wheel technology is a promising solution for energy storage systems. First in-service experience from trolley busses and stationary storage in a light city rail DC system show principal technological feasibility and reliability. High power fly-wheels for on-board storage in DMUs are still under development. Main barriers for fly-wheels are high initial investment and long payback times. Best cost-benefit ratio is reached for stationary storage systems in local DC systems. Scale effects will be small in the foreseeable future since no mass markets exist. Growing technological competition from double-layer capacitors make a wide-spread use of fly-wheel technology uncertain. Nevertheless, due to long life-time and relatively high maturity, fly-wheels are still a promising technology. |
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date created: 2002-10-09
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