The first ELIPTIC feasibility studies in Brussels, Bremen, Leipzig and Eberswalde have been completed with interesting results.
Use Case leader STIB in Brussels has completed a feasibility study to optimise the braking energy recovery in their tram network. Thanks to simulations and measurement analysis, STIB has been able to compare the amount of recovered braking energy in their tram and metro grids with reversible sub-stations. The study shows that the solution is not a priority in the STIB tram network. However the network density allows STIB to transfer high amounts of energy from one tram to another or to other consumers such as depots. This allows recovering large amounts of energy where many different lines are interconnected. Another important result from the study is need for reducing energy consumption of the auxiliaries by using more energy efficient technology for heating, air conditioning, lighting, and all on-board electronics. For more information about the completed Brussels feasibility study see here.
Use Case leader BSAG in Bremen has completed a study to verify the re-activation of an existing flywheel (a rotating device that is used to store energy). The study showed technological problems to overcome the second resonance frequency issue (strong vibrations at high speeds) that cannot be solved and it would not be economic to re-activate the existing flywheel.
Leipzig Use Case partners Fraunhofer and Leipziger Verkehrsbetriebe have completed a feasibility study on the electrification of the bus fleet in Leipzig using the existing tram infrastructure as a charging concept. Results show the existing potential of introducing battery buses on most service schedules with a reasonable amount of charging stations to be installed. However, some service schedules cannot be covered by battery buses without installing additional and unreasonable charging infrastructure.
Eberswalde Use Case partners Fraunhofer and BBG have completed a feasibility study on replacing diesel bus lines by extending trolleybus lines with trolley-hybrids. Results from the feasibility study have shown that the Use Case would not work with the current specifications, as the catenary would need to be extended to have more time for in-motion charging. A possible solution is to increase the charging power of the battery.
These results will be fully described in the Final Use Case Reports of each city, available soon in the Results section on the ELIPTIC website.
Contact: Yannick Bousse, firstname.lastname@example.org