• Document: R&D Status for Aerospace Fuel Cell Applications in Japan
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Disclosed Version R&D Status for Aerospace Fuel Cell Applications in Japan March 27, 2015 Shunichi OKAYA Senior Manager, Senior Fellow Office Institute of Space and Astronautical Science (ISAS) JAXA 1 Contents 1. Introduction 2. JAXA Organization 3. Fuel Cell Technologies for Aerospace Application 4. Fuel Cell Technologies Development in JAXA 4.1 Fuel Cell Application for HOPE 4.2 Fuel Cell Application for SPF Airship (HAA) and UAV 4.3 Fuel Cell Application for Planetary Exploration 5. Conclusion 2 1. Introduction  The fuel cell technology is being developed as the future promising ecological energy sources for the ground transportation systems applications and the terrestrial power plant applications under the big R&D funding of the government and the industries so far.  The fuel cell technology basis was originally developed for the spacecraft application (Gemini) about 50 years ago, and then this technology was applied to the main electric power system of Apollo spacecraft and Space Shuttle Orbiter because of its standalone higher performance capability (efficiency and power density).  JAXA is interested in this potential performance capability for the future aerospace power system applications, because the future aerospace system needs larger amount of electric power compared with that of the existing aerospace system 3 4 3. Fuel Cell Technology for Aerospace Application Fuel Cell State of the Art Technology Overview;  Types of the fuel cell; 1) Alkaline type (AFC), 2) Phosphoric Acid Fuel Cell (PAFC), 3) Molten Carbonate Fuel Cell (MCFC), 4) Polymer Electrolyte Fuel Cell (PEFC) and 5) Solid Oxide Fuel Cell (SOFC).  The most advanced and matured fuel cell type is PEFC, because the major automotive manufactures selected the PEFC as the power plant for their first generation fuel cell vehicle (FCV).  SOFC has the highest efficiency capability, and has been demonstrated in several terrestrial power generation system applications.  However several key issues are still remaining for the real mass production. - Competitive Price - Fuel Supply and Storage  JAXA is studying the integrated propulsion and power system concept and technologies in order to compensate the fuel supply and storage issues. 5 Nuvera “Andromeda-II” FC Stack ・85(kW) ・55×90×21(H)cm Ballard Mark 902 FC Stack (Volume:78 liters) ・85(kW)(@DC 284(V) ・Weight:140kg ・37.5×80.5×25(H)cm (Volume:75 liters) ・Weight:96kg Nissan FC Stack ・85(kW)(@DC 300(V)) ・50×70×10(H)cm (Volume:34liters) ・Weight:90kg → 43kg Typical Automotive Fuel Cell Installation High pressure Compressed Gas Tank 6 4. Fuel Cell Technologies Development in JAXA 7 4.1 Fuel Cell Application for HOPE 1. Mission of HOPE; to access ISS as HTV currently does. 2. Configuration; unmanned and launched by H-2A/B 3. Operation; Shuttle like reusable vehicle 4. Key Feature; Non-toxic propellant was planned to be used. Courtesy NASA 3 sets of 10 KW Alkaline Fuel Cell Courtesy NASA are installed. 8 4.1 Fuel Cell Application for HOPE 4. Fuel Cell for HOPE and More Electric HOPE (in 1996)  JAXA planned to apply the non-toxic fuel (methanol) as the common safer fuel for several subsystems

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