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Fuel Cells and Fuel Cell Systems

Fuel Cells and Fuel Cell Systems. ME 1065 L. Schaefer. Proton Exchange Membrane. Cathode: ½O 2 + 2 e - + 2 H + => H 2 O Anode: H 2 => 2 H + + 2 e - Overall: H 2 + 1/2 O 2 => H 2 O. Problems with PEMs/PEFCs. Hydrogen Tank Rupture. Direct Methanol.

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Fuel Cells and Fuel Cell Systems

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  1. Fuel Cells and Fuel Cell Systems ME 1065 L. Schaefer

  2. Proton Exchange Membrane Cathode: ½O2 + 2 e- + 2 H+ => H2O Anode: H2 => 2 H+ + 2 e- Overall: H2 + 1/2 O2 => H2O

  3. Problems with PEMs/PEFCs Hydrogen Tank Rupture

  4. Direct Methanol Cathode: 3/2 O2 + 6e- + 6H+ => 3 H2O Anode: CH3OH + H2O => 6H+ + CO2 + 6e- Overall: CH3OH + 3/2 O2 => 2 H2O

  5. DMFCs, cont.

  6. Alkaline Cathode: 1/2 O2 + H2O + 2e- => 2 OH- Anode: H2 + 2(OH)- => 2H2O + 2 e- Overall: H2 + 1/2 O2 => H2O

  7. AFCs, cont.

  8. Phosphoric Acid Cathode: ½ O2 + 2 H+ + 2 e- => H2O Anode: H2 => 2H+ + 2e- Overall: H2 + 1/2 O2 => H2O

  9. Molten Carbonate Cathode: 1/2 O2 + CO2 + 2 e- => (CO3)= Anode: H2 + (CO3)= => H2O + CO2 + 2 e- Overall: H2 + 1/2 O2 + CO2 => H2O + CO2

  10. MCFCs, cont.

  11. Solid Oxide Cathode: 1/2 O2 + 2 e- => O= Anode: H2 + O= => H2O + 2 e- Overall: H2 + 1/2 O2 => H2O

  12. SOFCs, cont.

  13. Basic Summary of Four Types

  14. Fuel Cell Summary

  15. Fuel Cell Governing Equations • Heat/Mass Transfer • Electrochemical • Electrical Network

  16. Governing Equations • Heat and Mass Transfer Model • Continuity, Momentum, Energy, Concentration

  17. Governing Equations • Heat and Mass Transfer Model, cont. • Continuity, Momentum, Energy, Concentration

  18. Hydrogen Fuel Cell Values

  19. Performance Curves

  20. Fuel Cell Buses

  21. Hybrid Power

  22. Electricity PV Chilled Water SOFC Turbine Chiller Boiler Hot Water Cogeneration and Cascading Energy Systems

  23. Unexpected Places!

  24. Figure for Example Problem

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