Osmanoğlu H. Residential Cogeneration Systems Based on PEM Fuel Cells

Thesis for the Degree of Master of Science in Mechanical Engineering Programme. - Istanbul, 2007. 194 p.Abstract
Özet
List of symbols
Abbreviations
List fo figures
List of tablesFuel cells
Brief history of fuel cells
Basic principles of fuel cells
Types of fuel cells
Advantages of fuel cells
Fuel cell applicationsPolymer Electrolyte Membrane (Pem) Fuel Cells
Operation Principles of Pem Fuel Cell And its Components
Operation Principles of PEM Fuel Cell
Main Cell Components
Cell Description
Membrane
Electrode
Gas Diffusion Layer
Bipolar Plates
Fuel Requirement
Technologies of hydrogen production
Fuel Cell Basic Chemistry and Thermodynamics
Basic Reactions
Heat of Reaction
Nernst Equation for Reversible Fuel Cell Voltage
Fuel Cell Output Voltage and Associated Losses
Activation Losses
The Tafel Equation
Internal Currents and Crossover Lossses
Ohmic Losses
Concentration Losses
Fuel Cell Output Voltage
Polarization Curve and its Sensitivity to Operation Parameters
Polarization Curve
Effect of Transfer Coefficient / Tafel Slope
Effect of Exchange Current Density
Effect of Internal Resistance
Effect of Limiting Current Density
Effect of Operation Pressure
Effect of Operation Temperature
Air vs. Oxygen
Fuel Cell Efficiency
Effect of Fuel Cell Operation Conditions
Operation Pressure
Operation Temperature
Reactants Flow Rates
Second Law Efficiency
Mathematical Model
Residential Cogeneration with Pem Fuelcells
Brief History of Cogeneration
Micro-Cogeneration
Methodology
PEM Fuel Cell Modeling
Model Assumptions and Operation Principles
Calculations for PEM Fuel Cell Modeling
Calculation of Output Voltage
Calculation of Electrical Power
Calculation of Heat Generation
Calculation of Useful Heat Generation
Calculation of Mass Flow Rates
Calculation of Exergy Values
Calculation of Efficiencies
Cogeneration
Heating and Cooling Loads
Electrical Consumption
Domestic Water Heating
Calculation of Cogeneration Cases
Results and Discussion
PEM Fuel Cell Modeling
Temperature Effects
Pressure Effects
Cogeneration
Conclusions and RecommendationsAppendix
Appendix A. Chemical Exergy Table
Appendix B. Heating and Cooling Load Parameters and
Results
Appendix C. Electrical Consumptions of the Residential House
Appendix D. Performance of Heat Pump for Different Models
Vita