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H. Kuhn, A. Sizmann
The most important challenge for the long-term future of the aviation industry is the substitution of fossil kerosene by a renewable energy base. Fully electric or hybrid-electric motive power systems have the potential to tap into a vast resource of renewable primary energy in combination with a significant reduction of emissions. This paper presents a future technology analysis approach in response to the fundamental requirements for electric flight. The Ragone metrics are applied at the component level of batteries and at the system level of hybrid-electric motive power system architectures. It is shown that (a) the advantage of hybrid power systems originates from a non-stationary power demand, (b) that the hybrid power system mass, derived from the fundamental step-function profile for a nonstationary power demand, yields a characteristic time scale for peak power demand for which a hybrid system can benefit from a high-power low-capacity subsystem, and that © the prospects for future lithium battery technology show potential for fully-electric (short-range) air transport. The combinatorial variety of battery cathode and anode materials, state-of-the-art advancements in battery research and the range extension enabled by a well-designed hybrid power system show where promising prospects and physical limits are for the introduction of (hybrid) electric air transport systems.
Deutscher Luft- und Raumfahrtkongress 2012, Berlin
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2012
21,0 x 29,7 cm, 8 Seiten
Stichworte zum Inhalt:
electric batteries, electric flying, fundamentals, renewable energy