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D. Kastell, T. Schröter, J. Brombach, B.H. Nya, D. Schulz, K. Wörmeyer, I. Smirnova
In the light tower project "cabin technologies and multi functional fuel cell" in the frame of the Hamburg Aviation Cluster, the application of a fuel cell and the connected innovations for cabin technologies are investigated for use in an aircraft. For the multi functional fuel cell the integration of the system in an aircraft environment is done in a lab where it is tested according to airborne requirements. In the second part of the project selected cabin systems and their interfaces to the fuel cell system are under investigation. New system architectures for use of the fuel cell products water and power and also air filters for the application of higher air circulation rates are developed. On this later part this paper will focus on. The project Energy optimized Cabin Systems deals with three aspects to reduce mass of the electrical system, to foster aircraft efficiency. These aspects are new 115 VAC architectures on future smaller civil aircraft, higher voltages and power management. In the scope of the project a wide set of architectures were analyzed and results showed, that in many cases decentralized architectures are lighter and more flexible on small aircraft than conventional centralized implementations. Analysis on higher voltages unveiled the promising HVDC approach, which allows weight savings not just in wiring but also in equipment. Power management, which shall permit (nearly) full usage of every wire, has the advantage of being installable on flying aircraft, was the last aspect investigated for weight savings in the electrical system. Another way to enhance the energy efficiency and cabin comfort of future aircraft is to increase the amount of recirculation air in the environmental control system. However, high rates of recirculation air demand for the separation of accumulating CO2 emitted by the passengers and crew. Among several options the most promising way to realize a CO2 separation unit successfully is using a solid adsorber, as a lightweight, simple separation unit with low overall energy consumption. The newly developed aerogel adsorbent, which is a amino functionalised silica aerogel, possesses a very high adsorption capacity at low CO2 concentrations (0.047 g/g) even in the presence of moisture, whereas it also able to remove not only CO2 but also water and ethanol. Finally, the ability to be regenerated at mild conditions will lower the energy consumption of an aircraft.
Deutscher Luft- und Raumfahrtkongress 2012, Berlin
Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn, 2013
21,0 x 29,7 cm, 8 Seiten
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