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ORC technology to use waste heat in MUs |
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| The waste energy produced by under-floor traction equipment in MU stock may be used for comfort functions. While the use of waste heat by means of heat exchangers is limited to heating, advanced technology based on the Organic Rankine Cycle (ORC) allows for the production of electric power from waste heat and thus for the use of waste energy for cooling or lighting purposes.
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Technology field: Optimisation of comfort functions
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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: 2 - 5% |
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Energy efficiency potential throughout fleet: 1 - 2% |
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Theoretically, the amount of waste energy produced is sufficient to cover the entire operation of comfort functions (in a EMU in regional operation waste energy is over 30 % of the energy needed for traction). However, in practice only a part of this energy can be exploited. ORCs reach efficiencies of 10 to 20%. Given this and the fact that comfort functions account for about 20% of total energy demand for passenger train operation, the saving potential will be below 5 %. |
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Other environmental impacts: ambivalent |
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Negative impacts on the climate from the organic compounds used have to be assessed but are estimated to be small. |
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Economic criteria
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Application outside railway sector
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Overall rating
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References / Links:
europa.eu.int
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Attachments:
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Related projects:
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Contact persons:
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 date created: 2002-10-09 |
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| © UIC - International Union of Railways 2003 |
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