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General information
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Description
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General criteria
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Status of development: test series |
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Several projects are actually running in the field of transportation applications, e.g. tram supply without catenary and voltage drop compensation for weak distribution networks. |
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Time horizon for broad application: 5 - 10 years |
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(no details available) |
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Expected technological development: highly dynamic |
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The main development goals for double-layer capacitor are - long lifetime
- increase of the rated voltage
- improvement of the range of operating temperature
- increase of the energy and power densities.
According to Montena, the rated voltage will be increased up to 3 V within the next years. To easily access automotive applications a temperatures range from –35 up to 105 °C seems realistic. Montena fixes energy and power density goals for double-layer technology at 10 Wh/kg and 10 kW/kg. From on-going research and development, Montena expects an increase of the electrolyte decomposition voltage and ionic conductance, an increase of the electrode accessible surface, chemical and mechanical stability as well as electronic conductance and the separator electronic insulation level and ionic conductance. A main activity lies in the development of new electrolytes based on the combination of novel organic solvents and improved conduction salts, permitting not only a higher rated voltage and a higher conductivity but also a larger operating temperature range. |
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Motivation:
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If used as a storage technology for braking energy, the motivation is saving energy. Other possible applications include the catenary-free operation of city trams. |
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Benefits (other than environmental): not applicable |
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Depends on application context.
Cf. Stationary energy storage in DC systems, Diesel-electric vehicles with energy storage and On-board energy storage in DC systems. |
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Barriers: medium |
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State of development Double-layer capacitors are only starting to become a mature and reliable technology. |
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Success factors:
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Depends on application context.
Cf. Stationary energy storage in DC systems, Diesel-electric vehicles with energy storage and On-board energy storage in DC systems. |
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Applicability for railway segments: medium |
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Type of traction: electric - DC
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Type of transportation: passenger - regional lines, passenger - suburban lines
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As can be seen from Figure 4 the performance of double-layer capacitors is fitted for the range from light rail vehicles to regional trains. Figure 4: Ragone diagram and charging times (corresponding to braking times of different trains) Source: IZT, data mainly from: Hentschel et al. 2000 |
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Grade of diffusion into railway markets:
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Diffusion into relevant segment of fleet: 0 % |
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Share of newly purchased stock: 0 % |
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(no details available) |
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Market potential (railways): low |
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(no details available) |
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Example:
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Stationary storage system in urban transport network Cologne |
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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: not applicable |
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Other environmental impacts: neutral |
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Economic criteria
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Application outside railway sector
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Status of development outside railway sector: prototype |
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Montena is realizing in collaboration with the University of Applied Science of Central Switzerland and other partners, a minibus based on the combination of a combustion engine with an electric power train involving a BOOSTCAP, a double-layer capacitor by Montena. |
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Time horizon for broad application outside railway sector: in 5 - 10 years |
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(no details available) |
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Expected technological development outside railway sector: highly dynamic |
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Cf. Technological potential outside railway sector |
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Market potential outside railway sector: medium |
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According to the Paumanok Supercapacitor Market Survey 1999/2000, the world market for double-layer capacitors was estimated to increase up to 500 Mio US$ within the next 5 years (i.e. by 2004/2005). |
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Overall rating
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