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General information
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Description
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Adtranz designed an innovative energy management system for the new IC-2000
coaches for Swiss SBB. One of the targets was a smoothened operation of
air-conditioning, i.e. keeping the air-conditioning system from over-reacting to
short-term variations in outside climatic conditions. For example: When the
train enters a tunnel, external temperature sensors recognize the steep
temperature change as transitory and the control keeps the air-conditioning
system from turning on the heating.
The same system foresees excess ventilation in the case of
overheating due to sunshine through windows.
Manufacturer
Adtranz (Bombardier). |
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General criteria
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Status of development: in use |
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Built into new IC 2000 coaches of SBB and tested successfully. |
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Time horizon for broad application: 2 - 5 years |
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(no details available) |
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Expected technological development: basically exploited |
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(no details available) |
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Motivation:
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- Energy efficiency
- Passenger comfort
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Benefits (other than environmental): medium |
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Increased passenger comfort |
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Barriers: low |
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Taylored solution
Due to differences in control of air-conditioning in different vehicle
series, a corresponding control device will to some extent require a solution
tailored to a particular vehicle class. |
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Success factors:
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(no details available) |
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Applicability for railway segments: medium |
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Type of traction: electric - DC, electric - AC, diesel
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Type of transportation: passenger - main lines, passenger - high speed, passenger - regional lines, passenger - suburban lines
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Applicability to passenger stock is in principle high. However, technical feasibility and economic profitability have to be checked for individual vehicle series. For the latter, the number of tunnels etc. in the operation regime of the vehicle will be relevant. |
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Grade of diffusion into railway markets:
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Diffusion into relevant segment of fleet: < 5% |
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Share of newly purchased stock: (no data) |
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(no details available) |
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Market potential (railways): medium |
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(no details available) |
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Example:
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Swiss IC 2000 |
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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% |
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Energy efficiency potential throughout fleet: < 1% |
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SBB claims that, due to the energy management system installed in IC 2000 train, a double decked coach does not consume more comfort energy than a normal single decked coach even though it offers 40 % more seats. However, it cannot be derived from this fact that comfort energy demand per seat is reduced to 1 / 1,4 = 71%. It has to be taken into account that a double-decked coach already consumes less comfort energy per seat than a normal coach in the first place.
A reasonable but still quite optimistic estimate would be to assume that the energy management system reduces comfort energy per seat by 10 – 20 %. In operation profiles with less tunnels (than in Switzerland), values between 5 and 10 % will be more likely. This corresponds to 1-2 % of total energy consumption. However, this is the effect of the system installed in IC2000 including excess ventilation. It is not known what share of the effect is owed to the smoothened air-conditioning control. |
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Other environmental impacts: neutral |
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(no details available) |
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Economic criteria
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Vehicle - fix costs: (no data) |
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(no details available) |
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Vehicle - running costs: minor reduction |
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(no details available) |
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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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Scale effects will be rather small since usually every vehicle series requires a tailored solution. The system will be more economic in larger series. |
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Amortisation: (no data) |
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(no details available) |
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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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Intelligent control algorithms for air-conditioning in order to ensure a smooth operation can save energy especially on routes with variable local climatic conditions (e.g. many tunnels). For average operation profiles the efficiency effects will be small. Profitability of such a system will be higher if it is combined with other measures (e.g. excess ventilation) to improve efficiency of air-conditioning. |
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date created: 2002-10-09
