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Modeling and Simulation of Water Distribution in the Various Layers of Polymer Fuel Cell

Savari, Mohammad Hossein | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45806 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Baghalha, Morteza; Khorashe, Farhad
  7. Abstract:
  8. Fossil fuel are energy resources in decline. In recent years, fuel cell have become as a source of energy to replace conventional systems .Among the various types of fuel cells, PEMFCs (proton exchange membrane fuel cells) possess a series of highly advantageous features such as a low-operating temperature, sustained operation at high-current density, low weight, compactness, potential for low cost and volume, long stack life, fast start-ups and suitability for discontinuous operation. Water management is one of the most critical and challenging problems. There is a delicate balance between the membrane hydration and avoiding cathode from flooding. Cathode flooding occurs when the water produced exceeds the water removal rate. Flooding in the cathode reduces the oxygen transport to the reaction sites and decreases the effective catalyst area. Liquid water that builds up at a fuel cell cathode decreases the performances and inhibits robust operation .Also Insufficient amount of liquid water reduces significantly proton conductivity. so one of the most critical aspects of a PEMFC is water managemen .in this work, We presented a non-isothermal two-phase two-dimensional model for modeling and simulation of water distribution in the various layers of polymer fuel cell. COMSOL Multiphysics was used to solve for all governing equations
  9. Keywords:
  10. Saturation ; Modeling ; Polymer Electrolyte Membrane (PEM) ; Water Distribution System ; Fuel Cell

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