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Der Schwarza‐Witznaustollen ist ein zur Schluchseewerk AG gehörender, ca. 9 200 m langer Triebwasserstollen mit einer unbewehrten Betonauskleidung. Der Zustand dieses im Zeitraum von 1929 bis 1943 erbauten Stollens wurde im Rahmen eines Pilotprojekts mit zerstörungsfreien Erkundungsverfahren wie Orthofotos und Stollenradar in interdisziplinärer Zusammenarbeit von Bauingenieuren, Geophysikern und Vermessungsingenieuren...
To reduce the environmental impact of the petroleum-based transport, new safe, cost and energy optimized electric vehicle propulsion concepts are mandatory. Besides the activities for improving the battery and power electronics technologies, highly integrated units and new functional component operation strategies are of special interest. In this paper, a methodical approach for deriving electric...
In this paper, a Fuel Cell based Energy Storage System (FC-ESS) was investigated for enhancing the range of a electrical commuter vehicle. While using a special High Temperature Polymer Electrolyte Membrane (HTPEM) fuel cell with a nominal stack output power of 6 kW, the FC-ESS must be heated up to 120°C. A Fuel Cell Control Unit (FCCU) was created to fulfil the stack working conditions on anode and...
The most common field of application of current electric vehicles is predominantly located in dense populated areas. For the road traffic between two urban areas, with the resulting high demands on range and vehicle velocity, current vehicles are used with high battery capacities (> 80 kWh), or internal combustion engines as range extender. The disadvantages of these two systems should be solved...
In this paper an energetic cabin model in Dymola is created to compare different heating strategies of a luggage tug. The cabin model is validated using a mock up in the climate chamber of the Institute of Vehicle Concepts at the German Aerospace Center. A virtual 20 kW fuel cell luggage tug has been created using Alternative Vehicles Library in Dymola. Heating concepts based on fuel cell thermal...
Thermal management is one of the main energy consumers of today's electric vehicles. To optimize its energy use it is necessary to develop more efficient or new thermal systems. Detailed measurements of HVAC (Heating, Ventilation and Air Conditioning) system parameters are mandatory for designing, creating and evaluating new vehicle energy concepts. In further studies a virtual car was simulated using...
Intracellular bacteria of the genus Caedibacter limit the reproduction of their host, the freshwater ciliate Paramecium. Reproduction rates of infected strains of paramecia were significantly lower than those of genetically identical strains that had lost their parasites after treatment with an antibiotic. Interference competition occurs when infected paramecia release a toxic form of the parasitic...
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