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Ventilation control (in new stock) |
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| Traction equipment is cooled by ventilation to prevent over-heating. The energy needed for ventilation can be substantially reduced by demand-controlled operation, i.e. by controlling ventilation power (e.g. the speed of the mechanical fans) according to actual cooling demand of the motor (or other traction equipment). The technology is wide-spread but not a standard yet.
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Technology field: Optimisation of traction technologies
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General information
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Description
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Conversion losses of traction equipment of an electric traction unit show up as heat that must be removed from the system continuously to prevent over-heating. This is done by the coolers that in many locomotives are realised as mechanical ventilators.
Although at peak load the power required for cooling is almost negligible, it is not at low load (cf. Figure 1). This share can be substantially reduced by demand-controlled operation, i.e. by controlling ventilation power (e.g. the speed of the mechanical fans) according to actual cooling demand of the motor (or other traction equipment).
While most modern locomotives and some EMUs are equipped with demand-controlled ventilation, the technology does not seem to be a standard in new stock.
Old stock can in some cases be equipped with demand-operated ventilation as a retrofit. |
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General criteria
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Environmental criteria
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Economic criteria
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Application outside railway sector (this technology is railway specific)
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Overall rating
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 date created: 2002-10-09 |
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| © UIC - International Union of Railways 2003 |
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