PROJECT PARTICIPATION IN THE DEVELOPMENT OF A DECISION MODEL FOR A PUBLIC TRANSPORT WITH ELECTRIC BUSES
Beside the orientation of passenger transport towards public, collective transport, the Saxon state capital Dresden also views the use of electrically powered vehicles as an effective, traffic-related measure to comply with its air pollution control plan from 2011. Since 2006, the DVB AG (offering transport services in Dresden) has been engaging itself with hybrid buses. Their introduction was especially supported by the „Modellregionen Elektromobilität“(eng.: model region for electro-mobility) by the German federal government and the Free State of Saxony. At the moment, the DVB AG operates 18 hybrid buses from different manufacturers and with various powertrain technologies and storage concepts.
The Free States of Bavaria and Saxony successfully applied for „Schaufenster Elektromobilität“(eng.: showcase electro-mobility) with the motto „Elektromobilität verbindet“(electro-mobility connects). Along with the TU Dresden, the DVB AG is represented in the showcase with two projects, the „Elektrobuslinie 79“(eng.: electric bus line 79) and the „Pilotlinie 64“(eng.: pilot line 79). In these projects the technological aspects of electric and hybrid powertrains as well as their applicability for public transport and efficiency enhancements in use are being examined.
In the project „Pilotlinie 64“, „Arbeitspaket 6“(working package 6), an economic-ecological evaluation model for the transfer from a conventionally powered bus line to an electrically powered one is created. Here, the question emerges, to what extent a purely electric bus is to be ecologically and economically preferred, compared to a conventional diesel bus. Furthermore, significant environmental impacts and costs for the different life cycle phases shall be identified.
In order to perform a holistic evaluation of the two alternatives, diesel and electric bus, the complete life cycles of the two powertrain types are regarded, involving not only the production, but also the entire use phase and end-of-life-phase. For choosing the appropriate bus lines for modeling, a multi-criteria evaluation is used, which, inter alia, connects the methods of Life Cycle Costing (LCC) on an economic level and Life Cycle Assessment (LCA) on an ecological level as well as the evaluation of qualitative elements. The Flow Structure Model from the Material Flow Cost Accounting (MFCA) serves as a common ground for LCC and LCA. Furthermore, methods for a model validation and Multi-Criteria Decision Analysis (MCDA) are used. The results from the evaluation instruments mentioned above eventually flow into a simulation model for the decision-making regarding future electric bus lines in Dresden.
In order to evaluate the operation of electric buses, with the collaboration of the IAD from the TU Dresden, a further model for the dimensioning of the battery storage capacity and the recharging strategy is being developed.
Client
- Dresdner Verkehrsbetriebe AG
Contractor
- GWT-TUD GmbH
Leadership
- Prof. Dr. Edeltraud Günther
Researchers
- Dipl.-Volksw. Ramona Rieckhof
Term
- 5/2015 to 2/2016
Funding
- Freistaat Sachsen, SMWA - „Schaufenster Elektromobilität“
Cooperation
- Technische Universität Dresden, Institut für Automobiltechnik (contact: Dipl.-Ing. Alexander Bunzel)