燃料电池内部传热传质分析pdf电子书版本下载

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1 INTRODUCTION 1

2 FUNDAMENTALS AND DEVELOPMENTS OF FUEL CELLS 4

2.1 FUEL CELL BASICS 5

2.2 FUEL CELL DEVELOPMENTS 6

3 TRANSPORT PROCESSES IN FUEL CELLS 9

3.1 SIMILAR TRANSPORT PROCESSES IN SOFCS AND PEMFCS 11

3.1.1 Gas transport 11

3.1.2 Electrochemical reactions 12

3.1.3 Heat transfer 13

3.1.4 Various transport processes in the electrodes(porous layers) 14

3.1.5 Other processes appearing in fuel cell components 14

3.2 ON DISSIMILARITIES OF MAIN PROCESSES IN SOFCS AND PEMFCS 15

3.2.1 Water management in PEMFCs 15

3.2.2 Fuel reforming issues in SOFCs 16

4 ANALYSIS METHODS AND EQUATIONS 18

4.1 ANALYSIS AND MODELING APPROACHES 18

4.2 MODELING DEVELOPMENTS 19

4.2.1 PEMFC modeling developments 20

4.2.2 SOFC modeling developments 21

4.2.3 Other processes/phenomena modeling relevant for fuel cells 22

4.3 PROBLEM STATEMENT AND ASSUMPTIONS 24

4.3.1 Problem statement 24

4.3.2 Analysis assumptions 25

4.4 GOVERNING EQUATIONS AND ADDITIONAL EQUATIONS 26

4.4.1 Governing equations 26

4.4.2 Additional equations 29

4.5 BOUNDARY CONDITIONS AND INTERFACIAL CONDITIONS 30

5 NUMERICAL SOLUTION PROCEDURE 32

5.1 COMPUTATIONAL FLUID DYNAMICS(CFD)APPROACHES 32

5.2 CFD CODES EMPLOYED 33

5.3 Solution Method 35

6 TRANSPORT PROCESSES IN CONVENTIONAL SOFC DESIGN 37

6.1 MASS TRANSFER EFFECTS 37

6.1.1 Fully developed gas flow and heat transfer in conventional SOFCAAs 37

6.1.2 Developing gas flow and heat transfer in conventional SOFCs 50

6.2 BUOYANCY EFFECTS 52

6.2.1 Developing velocity and temperature field 54

6.2.2 Distribution of the bottom wall spanwise Nusselt numbers 62

6.2.3 Longitudional distribution of averae f and Nusselt number 64

6.3 COMBINED EFFECTS 68

7 ANALYSIS OF TRANSPORT PROCESSES IN PEMFC DUCTS 72

7.1 GAS FLOW AND HEAT TRANSFER IN PEMFC DUCTS 73

7.1.1 Code Validation 74

7.1.2 Fluid Flow and Heat Transfer in Cathode Ducts 75

7.1.3 Fluid Flow and Heat Transfer in Anode Ducts 85

7.2 GENERAL DARCY MODEL FOR POROUS MEDIA 87

7.3 TWO-PHASE FLOW AND EFFECTS ON CELL PERFORMANCE 96

8 TRANSPORT PROCESSES IN ITSOFC ANODE DUCT 113

8.1 GAS FLOW AND HEAT TRANSFER PROCESSES 116

8.2 VARIOUS PARAMETERS'EFFECTS 121

8.3 SPECIES TRANSPORT PROCESSES 129

9 CONCLUSIONS AND FINAL REMARKS 136

APPENDIX 138

REFERENCES 142