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General information
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Description
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Railway vehicles, especially locomotives, have a long useful life (50 years and more). Therefore there is a large number of old diesel locomotives in service having a fuel economy far away from state-of-the-art technology. They can be upgraded in order to improve injection and compression characteristics.
Various modifications and conversion measures such as exhaust gas recirculation or modification of the injection system are viable. Most of these measures primarily aim at emission control. |
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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: 5 - 10% |
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Energy efficiency potential throughout fleet: (no data) |
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Other environmental impacts: positive |
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Economic criteria
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Vehicle - fix costs: medium |
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For the case of the retrofit of the MTU 12 V 956 TB 11 engine the price of the upgrading set is about 75.000 EURO. In order to reduce additional downtime for the respective vehicles, the measure has to be realised during a general overhaul which typically takes place every 6 years. |
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Vehicle - running costs: significant reduction |
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Improved fuel economy reduces operation costs by about 15.000 EURO per year (assuming 100.000 to 150.000 km per year). |
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Infrastructure - fix costs: none |
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(no details available) |
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Infrastructure - running costs: unchanged |
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(no details available) |
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Scale effects: low |
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To a certain extent, any upgrading set for a diesel engine is a taylored solution for a particular engine series. Therefore scale effects can be realised for large series. |
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Amortisation: 2 - 5 years |
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For the case of the retrofit of MTU engine (cf. General criteria - Example) the measures pays off in about 4 to 5 years (assuming 100.000 to 150.000 km per year). |
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Application outside railway sector (this technology is railway specific)
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Overall rating
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Overall potential: interesting |
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Time horizon: short-term |
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Retrofit measures on old diesel engines may in some cases prove cost-effective and promising for energy efficiency. Applicability is however limited to specific locomotive series. Furthermore, re-engineering of old stock will in most cases give higher energy efficiency effects and also be more profitable (despite higher initial investment). |