The preliminary design of an aircraft with fuel cell system for propulsion has been presented. With respect to the requests of the Berblinger-Competition and the higher demand of weight and volume for a fuel cell system, we chose the class of touring motor glider according to JAR 22. The concept of Hydrogenius fits best in this aircraft category. The big challenge is the development of a modern aircraft suitable for everyday use. Furthermore is it absolutely necessary to provide a very low failure probability and vulnerability and in case of accidents high safety for passengers. The Hydrogenius powertrain is classified in fuel cell system, high pressure gas tank and electric motor. The electrical engine for Hydrogenius is a result of the request for lowest weight. Using a fast rotate electric motor with a gear will fit in these terms best. The fuel cell system used in the preliminary design has high power density and low system volume. The main components of the fuel cell system the power distribution unit (PDU), the fuel cell module, the fuel cell system control unit (FCU) and the system module that purifies the gases to the required conditions. The advantage of a fuel cell system is the high efficiency. The point of maximum range correlates with region of best efficiency of the fuel cell. By using an aircraft optimized process conduct or adapting the fuel cell system for higher altitudes (3000 metres), the loss of system efficiency, which is a result of lower pressure and lower temperature, is much lower compared to conventional combustion engines. An aircraft for everyday use needs modest fuel storage. We decide to use gaseous hydrogen because of easier fuelling. The pressure tank operates with a pressure of 350 bar and a capacity of 4,3 kg gaseous hydrogen and the dimension is good to integrate in the fuselage. The electric motor, the gearbox and the control unit together achieve an efficiency factor of about 90 %! For this reason the electric energy which is provided by the fuel cell system will be transferred very efficiently. The weight and the required installation space as well as the comparative little amount of fuel have a significant influence on form and dimension of Hydrogenius. Hydrogenius shows impressively that appealing flight performance is achievable with low energy input.


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    Title :

    Hydrogenius: flying with hydrogen


    Contributors:


    Publication date :

    2007


    Size :

    10 Seiten, 7 Bilder, 3 Tabellen, 6 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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