Highly integrated direct methanol fuel cell systems minimizing fuel loss with dynamic concentration control for portable applications |
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| Affiliation: | 1. TU Braunschweig, Franz-Liszt-Str. 35, 38106 Braunschweig, Germany;2. SINTEF Applied Cybernetics, PO Box 4760 Sluppen, Trondheim, Norway;3. International Max Planck Research School for Advanced Methods in Process and Systems Engineering, Sandtorstr. 1, 39106 Magdeburg, Germany;1. Professor, Postdoctoral Program, Institute of Aeronautics Technology (ITA), São José dos Campos, Brazil;2. Assistant Professor, Dental Prostheses, Department of Dentistry, University of Taubaté (UNITAU), Taubaté, Brazil;3. Associate Professor, Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, Brazil;4. Researcher, Engineering, Applications Laboratory, Institute of Aeronautics Technology (ITA), São José dos Campos, Brazil;5. Associate Professor, Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, Brazil;1. College of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin Hongqi Avenue 999# 150050, China;2. Institute of Physics and Electronic Engineering, Harbin Normal University, Harbin Limin Economic Development Zone Shida Avenue 1#150010, China |
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| Abstract: | Direct methanol fuel cell (DMFC) systems are mostly composed of massive water recycling devices such as coolers, condensers or mixers even for small and light portable applications. Integrated systems, where system components serve more than one function, can be equipped with fewer components and have a lighter weight than conventional ones. However, the process integration can also bring about significant methanol evaporation in separators, resulting in low fuel efficiency. The here presented highly integrated system can minimize methanol loss with optimized concentration control to improve efficiency. Two system variants are compared with regard to concentration, temperature, water recovery controllability and efficiency. The simulation results are compared with the previously published mingled-outlet system and validated with experiments. |
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| Keywords: | DMFC Fuel cell systems Process integration Concentration control |
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