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3 \6 P* @: c$ _ @- g2 cFuel Cell Systems Explained
5 N z, o, h/ H( D4 v+ x5 zSecond Edition 2003出版的
; a+ \+ L) ~: r: r) d! P第一版是2000年1月出版的
8 J C) y/ l( t* Q1 e* u下面是目录
" U5 p: l- F, v1 r" pContents
) X; R V9 w& S) i5 fPreface ............................................................................................ xiii : u9 c6 l, v! @6 w
Foreword to the First Edition ........................................................... xv
i/ ~* v. ?7 j: X ^/ O5 u! }6 RAcknowledgements ......................................................................... xvii 2 A' K6 l6 [: y
Abbreviations ................................................................................... xix
; m- O# Q5 N3 FSymbols ........................................................................................... xxi
4 u t$ X4 y5 b5 X0 i# l1. Introduction ............................................................................. 1
' o- y# d$ l2 e; F; u1.1 Hydrogen Fuel Cells – Basic Principles ..................................... 1
2 }2 g3 [" T3 {! i' ]1.2 What Limits the Current? ........................................................... 5
. O8 A7 H5 x# h8 |/ V) |) W0 V( ?1.3 Connecting Cells in Series – the Bipolar Plate .......................... 6
5 }" O6 d, m+ d6 c+ k8 U1.4 Gas Supply and Cooling ............................................................ 10
/ }" t/ ~ ^# b! e$ U$ f1.5 Fuel Cell Types .......................................................................... 14 & f4 E0 O! ~1 M: w' |7 ]6 R
1.6 Other Cells – Some Fuel Cells, Some Not ................................ 16 D+ f: C( m, e
1.6.1 Biological Fuel Cells ...................................................... 17 * D; ?% {; y7 I7 m1 F3 c
1.6.2 Metal/Air Cells ................................................................ 17
9 i3 |8 q$ C) I6 X) O- h6 T5 K' A1.6.3 Redox Flow Cells or Regenerative Fuel Cells ............... 18
( Q6 `) M/ t6 s1 W# q2 ]* `1.7 Other Parts of a Fuel Cell System ............................................. 19 % _* d8 y* Q2 n. M
1.8 Figures Used to Compare Systems ........................................... 21 6 I9 z) D: x& s2 F
1.9 Advantages and Applications .................................................... 22 1 A, @: \& U1 s2 f
References ......................................................................................... 24 7 L& I5 n+ ?& j3 q2 p& I
2. Efficiency and Open Circuit Voltage ..................................... 25
) C$ a! G/ T# o' o$ `# ^4 p, m2.1 Energy and the EMF of the Hydrogen Fuel Cell ........................ 25 4 J- d. A& ?$ J. |8 t* g
2.2 The Open Circuit Voltage of Other Fuel Cells and Batteries ..... 30 7 S$ v# x: x8 L0 r# }* Z
2.3 Efficiency and Efficiency Limits ................................................. 31 % B4 P( I7 v5 Y% H7 \
2.4 Efficiency and the Fuel Cell Voltage .......................................... 34
1 q% Y" c8 k2 Y& m1 g2.5 The Effect of Pressure and Gas Concentration ......................... 35 + C" s k$ ~- f$ \
2.5.1 The Nernst Equation ...................................................... 35
) I+ C" u7 Q" ?5 c8 D( S# G2.5.2 Hydrogen Partial Pressure ............................................. 38 4 p1 Q% }; N( @0 f
2.5.3 Fuel and Oxidant Utilization ........................................... 39
! A+ \; U. ~0 @8 D2 X. U2.5.4 System Pressure ............................................................ 40 : s& G1 B/ ~# z" X6 c
2.5.5 An Application – Blood Alcohol Measurement ............... 41 ! ?# C6 W! h5 B2 X. F$ k: m6 N% G0 R7 P
2.6 Summary ................................................................................... 42
, X9 V3 c% h3 e( s& ^4 L1 UReferences ......................................................................................... 43 ; [6 K1 f+ f" h" @: H
3. Operational Fuel Cell Voltages .............................................. 45
/ i$ p. l. X# ^2 y- g3.1 Introduction ................................................................................ 45
* `: H9 J& K4 G0 @) K! e3.2 Terminology ............................................................................... 47 5 s0 }, i# z1 d: D: v+ M
3.3 Fuel Cell Irreversibilities – Causes of Voltage Drop .................. 47
1 N" X8 G- G) |7 ~$ q0 {* ?3.4 Activation Losses ....................................................................... 48 1 K, v& o1 P/ T4 l. R: @1 U8 T2 D
3.4.1 The Tafel Equation ........................................................ 48
: j# H7 X! V( s* l3.4.2 The Constants in the Tafel Equation .............................. 49
# E# D0 J* n7 H, T3.4.3 Reducing the Activation Overvoltage ............................. 52
6 X, p: b7 y( x' w3.4.4 Summary of Activation Overvoltage ............................... 53 * i( E' z3 U4 p5 |1 X; E
3.5 Fuel Crossover and Internal Currents ....................................... 53 5 _; x6 s. x* p' A
3.6 Ohmic Losses ............................................................................ 56
! b. Z# O: ]6 i: c! v% U% H( ^3.7 Mass Transport or Concentration Losses .................................. 57
1 C. i! z* u+ w* Z7 X! H u3.8 Combining the Irreversibilities ................................................... 59 $ u' j0 P) C4 r+ }1 b
3.9 The Charge Double Layer ......................................................... 61 8 T4 N: u2 C+ k" k
3.10 Distinguishing the Different Irreversibilities ................................ 63 4 o$ R p6 v% o: K% \. b; i0 _8 w" v
References ......................................................................................... 66
# T& v2 b: z7 e8 u3 V B( ]4. Proton Exchange Membrane Fuel Cells ................................ 67 0 F% A6 S3 }/ L+ V; ]' w* N1 [, k
4.1 Overview .................................................................................... 67
: G6 Q- W, H2 [6 q4.2 How the Polymer Electrolyte Works .......................................... 69
' G( {. c: ~+ y q8 U. E9 |4.3 Electrodes and Electrode Structure ........................................... 72 3 J( @) p% w; A+ L! B: ~- u8 n: q* ]
4.4 Water Management in the PEMFC ............................................ 75
; n7 d1 H( ?8 w/ E8 {, v% K4.4.1 Overview of the Problem ................................................ 75 I; G5 X% | }' L7 _" |' ]& ?5 B1 {
4.4.2 Airflow and Water Evaporation ...................................... 76
0 P( u8 P4 H+ F. b T/ F4.4.3 Humidity of PEMFC Air .................................................. 80 ( | B4 F4 \! V( P3 P
4.4.4 Running PEM Fuel Cells without Extra Humidification .. 83
) J9 T6 V& u, t* M9 h8 e& g4.4.5 External Humidification – Principles ............................... 85 , \ \' d1 o+ R' N) ?
4.4.6 External Humidification – Methods ................................ 87 5 e9 y( m! R; Y5 }
4.5 PEM Fuel Cell Cooling and Air Supply ...................................... 90 : M0 C% g, E9 e1 L7 G2 S) I
4.5.1 Cooling Using the Cathode Air Supply ........................... 90
" n$ C' z0 `. z& ^) g4.5.2 Separate Reactant and Cooling Air ............................... 91 ! i0 A" g' [- l; B7 B h6 d; I2 N
4.5.3 Water Cooling of PEM Fuel Cells .................................. 93
, A1 \$ k7 r; v1 S, ]4.6 PEM Fuel Cell Connection – the Bipolar Plate .......................... 94 # K2 y5 e7 l4 M8 _
4.6.1 Introduction .................................................................... 94
7 E% [+ L# c0 t) w: S4.6.2 Flow Field Patterns on the Bipolar Plates ...................... 94 ' D* j F4 Y! n: k
4.6.3 Making Bipolar Plates for PEM Fuel Cells ..................... 96
5 x9 T! _1 Q( _5 s* G; {4.6.4 Other Topologies ........................................................... 100 " C1 r7 u% F2 n% @4 y7 b& o
4.7 Operating Pressure ................................................................... 102 1 j" N9 ^) P) i6 L' j
4.7.1 Outline of the Problem ................................................... 102 ) \) [( O! i9 U
4.7.2 Simple Quantitative Cost/Benefit Analysis of Higher 8 J7 z/ y( {: _; `
Operating Pressures ...................................................... 103
2 E7 X/ G/ Q# E: c1 w4.7.3 Other Factors Affecting Choice of Pressure .................. 108 : z' I& R; U& H# R- U* E2 D
4.8 Reactant Composition ............................................................... 110 9 X0 Z9 h& S3 R+ G6 `# F1 P4 ?
4.8.1 Carbon Monoxide Poisoning .......................................... 110 ( s# Z) N3 M/ |: L7 X4 X
4.8.2 Methanol and Other Liquid Fuels ................................... 111 ' ~' ^1 w2 l5 a- `
4.8.3 Using Pure Oxygen in Place of Air ................................. 111 f) o2 ]' U! C5 ~
4.9 Example Systems ...................................................................... 112 & h" o6 S. U% J1 W3 i
4.9.1 Small 12-W System ....................................................... 112 3 `& V& A% |1 u( I* Y! e; _6 M
4.9.2 Medium 2-kW System .................................................... 114
: Y, u+ q. ]" ~+ f$ u" Y9 k9 j5 v O4.9.3 205-kW Fuel Cell Engine ............................................... 117
8 g' c; m5 |# D5 q* f! O" ]References ......................................................................................... 118
* Y7 [$ g( Y5 W6 @/ D7 C5. Alkaline Electrolyte Fuel Cells ............................................... 121 ' W& `6 }# o7 ]6 D
5.1 Historical Background and Overview ......................................... 121
: d: V4 W9 q A% z1 E2 V8 @# L5.1.1 Basic Principles ............................................................. 121 ! ^, D9 g) q9 t. v( c) G
5.1.2 Historical Importance ..................................................... 121 2 K. P6 u6 k" z, L% t0 G
5.1.3 Main Advantages ........................................................... 122
% A/ t$ q# j. ^0 i- M W* g/ N, ]5.2 Types of Alkaline Electrolyte Fuel Cell ...................................... 124 ! M7 h+ Y$ |( |* t
5.2.1 Mobile Electrolyte .......................................................... 124
, O- I% m* `- ]5.2.2 Static Electrolyte Alkaline Fuel Cells .............................. 127
# H# j: K+ \$ [( D& n5.2.3 Dissolved Fuel Alkaline Fuel Cells ................................. 129
9 p6 ?' _" ?7 }6 l5.3 Operating Pressure and Temperature ....................................... 132 4 p p( t, a+ k4 j, L
5.4 Electrodes for Alkaline Electrolyte Fuel Cells ............................ 134 . n' @* x6 G) r
5.4.1 Introduction .................................................................... 134 . M7 B! G5 I2 F: h, x+ [' @
5.4.2 Sintered Nickel Powder ................................................. 134
- y d& P7 {- J: a+ w! r, t" Z7 r- O5.4.3 Raney Metals ................................................................. 135 3 |, a$ n r: P0 ^8 O
5.4.4 Rolled Electrodes ........................................................... 135 1 W9 C8 U- _, J5 I
5.5 Cell Interconnections ................................................................. 137 8 G" @4 f+ c; T2 `/ p& |
5.6 Problems and Development ...................................................... 137 # K' \% k! b# r
References ......................................................................................... 138
" |# U, x" S5 Y( P6. Direct Methanol Fuel Cells ..................................................... 141 - z& g. q4 I+ x5 G0 Z$ a, J
6.1 Introduction ................................................................................ 141 " x) n+ U/ m7 R9 S- R+ A+ p
6.2 Anode Reaction and Catalysts .................................................. 143
* \; @8 e( c5 Z2 g6.2.1 Overall DMFC Reaction ................................................. 143 - s1 o, ^2 g8 l
6.2.2 Anode Reactions in the Alkaline DMFC ......................... 144
/ g- g3 x; T) f! t0 c) |6.2.3 Anode Reactions in the PEM Direct Methanol FC ......... 144 4 j2 Z+ u K: n) f. J" w
6.2.4 Anode Fuel Feed ........................................................... 146 0 f1 }+ z; c8 g Q* S
6.2.5 Anode Catalysts ............................................................. 147 , g- _6 i+ L! S' X4 d
6.3 Electrolyte and Fuel Crossover ................................................. 148
+ C9 Z7 d, f7 h+ Q2 U1 x6.3.1 How Fuel Crossover Occurs .......................................... 148
0 q$ C% w4 V( S0 Q: J6.3.2 Standard Techniques for Reducing Fuel Crossover ...... 149
$ R+ }4 F; h3 e3 N6.3.3 Fuel Crossover Techniques in Development ................. 150 / R7 |) H# j w
6.4 Cathode Reactions and Catalysts ............................................. 151 ! t, I( @3 L6 A; Z
6.5 Methanol Production, Storage, and Safety ................................ 152 - }6 m+ o9 X$ @* z: S
6.5.1 Methanol Production ...................................................... 152 " a- i$ q1 A& P2 Z& t7 @- y
6.5.2 Methanol Safety ............................................................. 153 ; i3 Q r. O7 d+ g& ?
6.5.3 Methanol Compared to Ethanol ..................................... 155 ; J# K* e( Y# j F" H; C
6.5.4 Methanol Storage .......................................................... 156
3 v' |% q6 J' m6.6 Direct Methanol Fuel Cell Applications ...................................... 157
, x1 n, z% L8 J! ?References ......................................................................................... 160 ; f8 B! ~# M' d4 M' A+ u1 s
7. Medium and High Temperature Fuel Cells ........................... 163 , v2 V3 R* {- {! @- }" d! ~& e% d& H
7.1 Introduction ................................................................................ 163 ( d' w! I' u1 H4 |. l7 N! |
7.2 Common Features ..................................................................... 165
! P, R6 q, _8 c4 |* C/ l7.2.1 An Introduction to Fuel Reforming ................................. 165 1 A K n' K1 y1 o0 U
7.2.2 Fuel Utilization ............................................................... 166 2 Z- x4 M: ]% s3 F% \4 j$ W
7.2.3 Bottoming Cycles ........................................................... 168
" m2 W9 O+ o4 _7.2.4 The Use of Heat Exchangers – Exergy and Pinch 7 ?/ b- R& c$ o7 c
Technology .................................................................... 174 ' l6 G9 I7 R3 I( q
7.3 The Phosphoric Acid Fuel Cell (PAFC) ..................................... 177
4 v0 `# W' c- z7.3.1 How It Works ................................................................. 177
( A9 J3 b2 R2 D; }" W3 e0 y4 i7.3.2 Performance of the PAFC .............................................. 182
F0 t i( ` o- S+ H) m7.3.3 Recent Developments in PAFC ..................................... 184
' w6 @9 Q6 w: M6 ^7 ?: e# ?1 Y7.4 The Molten Carbonate Fuel Cell (MCFC) .................................. 187
/ X) ]: B. P* T9 @+ M1 ^+ m# O' M+ `7.4.1 How It Works ................................................................. 187 " y/ T- r! l& G$ ]
7.4.2 Implications of Using a Molten Carbonate Electrolyte ... 190 + X% X- Z* M- `3 {+ E$ _# r- ?
7.4.3 Cell Components in the MCFC ...................................... 190
, A, Z7 U: I2 c* S0 k7.4.4 Stack Configuration and Sealing .................................... 195 ; H# V- @4 ^6 W& ]; ?1 v
7.4.5 Internal Reforming ......................................................... 196
0 N% X' I" i- l. b( R9 E# d4 f9 ]7.4.6 Performance of MCFCS ................................................. 198
# L9 v5 ~6 P3 L- {% h* V" c7.4.7 Practical MCFC Systems ............................................... 202
$ {# p1 T) D5 p& E% [& D. |7.5 The Solid Oxide Fuel Cell .......................................................... 207 c0 H5 q9 i. E! f' s' [7 D# ^; T% h6 Z( }
7.5.1 How It Works ................................................................. 207
1 w6 o* H8 Q) i( l, Y7.5.2 SOFC Components ........................................................ 209 ) L& k/ z( n8 }+ v3 }
7.5.3 Practical Design and Stacking Arrangements for the , Y' S% \! H* t9 A! _; Z
SOFC ............................................................................. 213 ; u6 o; U% k: Z5 A) F$ v
7.5.4 SOFC Performance ....................................................... 220
* ^+ \0 D* t) G8 `9 m* X7.5.5 SOFC Combined Cycles, Novel System Designs and
5 i$ Y/ w0 |0 N+ l. ^) QHybrid Systems .............................................................. 221 2 i! j4 ?3 _3 X3 y
7.5.6 Intermediate Temperature SOFCs ................................. 225
2 @1 H( L2 y- x: E! F( {References ......................................................................................... 226
5 `; B4 S T0 V. R8. Fuelling Fuel Cells .................................................................. 229
& g# W. {8 q9 L" S' S+ b/ A8.1 Introduction ................................................................................ 229 2 v0 e7 K. z3 M, T0 r. H
8.2 Fossil Fuels ............................................................................... 232
/ S5 G2 U! t/ S7 Y8 b- {9 C8.2.1 Petroleum ...................................................................... 232
: Y r# g$ I! }1 U8.2.2 Petroleum in Mixtures: Tar Sands, Oil Shales, Gas 3 C1 q$ R" G+ ]8 R2 s$ ]6 S! V6 G' u) I, C
Hydrates, and LPG ........................................................ 233
( y* y! m- b5 r$ g. E" I8.2.3 Coal and Coal Gases ..................................................... 234 8 p K7 z) K/ y/ b4 M! M$ A! c
8.2.4 Natural Gas .................................................................... 235
% |2 G% _# S% X3 c8.3 Bio-Fuels ................................................................................... 236 # l0 v @2 h7 S* a" Z L
8.4 The Basics of Fuel Processing .................................................. 238 ' v7 N3 D+ k+ ~5 _' U; n; O2 d
8.4.1 Fuel Cell Requirements ................................................. 238 1 p) [! y' H4 a1 j% C, s- J2 N
8.4.2 Desulphurization ............................................................ 239 % f8 X: A( A: G2 J
8.4.3 Steam Reforming ........................................................... 241 / k- t$ v2 c' H1 u
8.4.4 Carbon Formation and Pre-Reforming ........................... 244 . I# ]- h/ x: m( [
8.4.5 Internal Reforming ......................................................... 246 $ l( ]0 ~( W4 X& l* s7 g
8.4.6 Direct Hydrocarbon Oxidation ........................................ 248
% G) u4 E/ O% |- h$ f8.4.7 Partial Oxidation and Autothermal Reforming ................ 248 " y8 U9 _7 Q* z \3 V; F" L- Z
8.4.8 Hydrogen Generation by Pyrolysis or Thermal
2 e [, C. _1 S; c" M$ R9 x石皮解ing of Hydrocarbons ............................................. 250 8 w5 P' d# \5 N1 C: a, H
8.4.9 Further Fuel Processing – Carbon Monoxide Removal . 250
$ t0 S- d- j Q! h! {, z& I0 G5 ^8.5 Practical Fuel Processing – Stationary Applications .................. 252
/ x2 h7 L0 ^ S G0 O. Y, K8.5.1 Conventional Industrial Steam Reforming ..................... 252 ( l! Y/ L" _+ j/ }- O0 t- m
8.5.2 System Designs for Natural Gas Fed PEMFC and * w2 y% Y$ r2 Z# e; b! ?
PAFC Plants with Steam Reformers .............................. 253 ! G% Q7 K" R% A+ x4 b
8.5.3 Reformer and Partial Oxidation Designs ....................... 257
3 E0 p, i7 W5 \5 V' u j8.6 Practical Fuel Processing – Mobile Applications ....................... 263 " s& k! I/ h; X' J: m; P* B- L
8.6.1 General Issues ............................................................... 263 1 I" a& h' ] J: l* G! j
8.6.2 Methanol Reforming for Vehicles ................................... 264 # U# D2 Y% _5 ?+ O, V; X
8.6.3 Micro-Scale Methanol Reactors ..................................... 267 9 \! d; [" H. J
8.6.4 Gasoline Reforming ....................................................... 269 9 E& C6 f% i3 B. L8 e# R( k
8.7 Electrolysers .............................................................................. 270 3 W3 ]) ? P U6 z+ V& T
8.7.1 Operation of Electrolysers ............................................. 270 ( z* U! }4 i# I5 P G. v9 f
8.7.2 Applications of Electrolysers .......................................... 272
/ P# ?( N; x; ^5 T* O/ f, \& Z8.7.3 Electrolyser Efficiency .................................................... 272
; X, d& @8 h1 D, `( I8.7.4 Generating at High Pressure ......................................... 273 ( e3 ~) f' r9 i+ l; Y
8.7.5 Photo-Electrolysis .......................................................... 275
/ b& A* O2 l5 G8 t8.8 Biological Production of Hydrogen ............................................ 275 9 k0 s, F( F# W4 h( v
8.8.1 Introduction .................................................................... 275
) X: d8 a& K: _8.8.2 Photosynthesis .............................................................. 276 * Z+ v/ F0 {7 k" h; Z" }' l( N
8.8.3 Hydrogen Production by Digestion Processes ............... 278 ; } H4 Q1 g7 C& L, m% S
8.9 Hydrogen Storage I – Storage as Hydrogen ............................. 279 ) Y7 ` k, ?: V/ f, C
8.9.1 Introduction to the Problem ............................................ 279 ! o) N; v$ L# z; A
8.9.2 Safety ............................................................................. 280
6 i! O; h1 Q( M" G# h8 |8.9.3 The Storage of Hydrogen as a Compressed Gas .......... 282 / ]+ [6 P/ E6 u. @. @
8.9.4 Storage of Hydrogen as a Liquid ................................... 284 7 m& v% n& [5 T% r+ {; s$ D- C
8.9.5 Reversible Metal Hydride Hydrogen Stores ................... 286 1 S# r9 J8 n5 A" | h
8.9.6 Carbon Nanofibres ......................................................... 289 ( u' f! b! }; ?; b. D
8.9.7 Storage Methods Compared .......................................... 291
; c8 a+ W2 c' t% H+ ~0 d8.10 Hydrogen Storage II – Chemical Methods ................................. 293 9 b# L/ u T6 N5 T$ c% X: u
8.10.1 Introduction .................................................................... 293 6 ~0 r5 h- c% m. u* F
8.10.2 Methanol ........................................................................ 293 2 T0 H$ k; M/ Z0 k9 n0 _
8.10.3 Alkali Metal Hydrides ..................................................... 295 8 @, \; ]' F; T
8.10.4 Sodium Borohydride ...................................................... 297 , s$ u+ L) X9 ~9 X) Q3 j
8.10.5 Ammonia ........................................................................ 301 1 b" N8 i8 ]# i/ g1 I
8.10.6 Storage Methods Compared .......................................... 304
9 I" B% k+ J( P# J) D9 L7 m: wReferences ......................................................................................... 305
' J& ~( W+ ~: M8 h& f, m9. Compressors, Turbines, Ejectors, Fans, Blowers, and
G) D2 ]( [! I QPumps ...................................................................................... 309
5 I/ j, B2 m7 w% T0 u, S# g1 {0 G9.1 Introduction ................................................................................ 309 - c2 x% H4 ^; |0 l1 d) p$ l9 ]" x% [
9.2 Compressors – Types Used ...................................................... 310
( I* ?! ]1 o, R7 I( o* [9.3 Compressor Efficiency ............................................................... 312
; G" O( f( N! `9.4 Compressor Power .................................................................... 314 $ r" S1 d; }) [+ L* n+ m8 y/ a# q
9.5 Compressor Performance Charts .............................................. 315
% M: p. Z; e- C' w9.6 Performance Charts for Centrifugal Compressors ..................... 318 . }: ^+ ]% Y7 Z0 M
9.7 Compressor Selection – Practical Issues .................................. 320
# ]; P* P3 g; l+ u, {; |. y$ D7 U- f9.8 Turbines ..................................................................................... 321 $ h2 }9 D( N+ M+ [( w
9.9 Turbochargers ........................................................................... 325
* M8 V9 E3 X& o) y9.10 Ejector Circulators ..................................................................... 326 3 w5 X9 H' D8 ^2 T5 a
9.11 Fans and Blowers ...................................................................... 327
9 ?/ W9 m; A2 t- Y6 V9.12 Membrane/Diaphragm Pumps ................................................... 328
Z# u/ | e' }0 dReferences ......................................................................................... 330
9 |; z% J* B: t2 [* Z$ |10. Delivering Fuel Cell Power ..................................................... 331 . ]/ g- O6 y0 u9 F
10.1 Introduction ................................................................................ 331
' D8 a$ A( n J1 B3 M, G! L10.2 DC Regulation and Voltage Conversion .................................... 332 * k+ j/ B' h1 D- P3 K0 p- p) u7 I
10.2.1 Switching Devices .......................................................... 332 " T* n2 i' K1 M# j/ S8 O
10.2.2 Switching Regulators ..................................................... 334 7 Q. X$ p7 W- w( h4 [2 M
10.3 Inverters ..................................................................................... 339
3 F3 v6 ]' T5 ?10.3.1 Single Phase .................................................................. 339
( f, f: q7 `) ^1 B10.3.2 Three Phase .................................................................. 344 , d/ U; x1 b$ h0 i2 M" m- C" }. J
10.3.3 Regulatory Issues and Tariffs ........................................ 346
% Y- o/ e4 F. z. M10.3.4 Power Factor Correction ................................................ 348 6 T6 V! B# ] d( o1 ^7 U
10.4 Electric Motors ........................................................................... 349 $ k& Q1 v* K" T: W: ~
10.4.1 General Points ............................................................... 349 & p3 K% k, a! v. S: @
10.4.2 The Induction Motor ....................................................... 350 " G9 W4 L. k7 g4 x1 O+ d
10.4.3 The Brushless DC Motor ................................................ 352
5 i6 k& l% O2 s- ]# f P10.4.4 Switched Reluctance Motors ......................................... 355 " E# f; T: i' O' M1 _5 a
10.4.5 Motors Efficiency ........................................................... 357
) h9 A! M/ t$ t5 u! y" f! P10.4.6 Motor Mass .................................................................... 361 8 ]# Q$ k& Z8 P2 ?+ [
10.5 Fuel Cell/Battery or Capacitor Hybrid Systems ......................... 362 . K& Q2 T0 ^6 q' `+ G0 H- n
References ......................................................................................... 367
; R8 a& O& I8 s& q! I( X4 D11. Fuel Cell Systems Analyzed .................................................. 369
$ J7 s+ [6 V* T( D4 m' [, m8 t11.1 Introduction ................................................................................ 369 + J8 k% ] q" C3 F
11.2 Energy Systems ........................................................................ 370 : a$ B+ u$ p5 `8 g
11.3 Well-To-Wheels Analysis ........................................................... 371 ; |( }' H: r& e+ {
11.3.1 Importance of Well-to-Wheels Analysis ......................... 371 3 b4 s( Z1 M) k A6 _ D6 ^& N
11.3.2 Well-to-Tank Analysis .................................................... 372
, l. A1 J6 K! N. U11.3.3 Main Conclusions of the GM Well-to-Wheels Study ...... 374 ' \- d. ?! C4 z( U
11.4 Power-Train or Drive-Train Analysis .......................................... 375
& k6 s# G- d; P2 o6 }- V% X: L11.5 Example System I – PEMFC Powered Bus ............................... 377
$ y+ s- \$ n* ~6 r& p) J A11.6 Example System II – Stationary Natural Gas Fuelled System ... 382
: Q) q! I; ?: ~% H! ?11.6.1 Introduction .................................................................... 382
0 A- A1 Q! g. | [; x9 c5 |11.6.2 Flow Sheet and Conceptual Systems Designs .............. 382 5 V+ ]$ c! L7 I& E/ h
11.6.3 Detailed Engineering Designs ....................................... 386 , y6 _) j2 W1 {, u1 r, C+ `& U
11.6.4 Further Systems Analysis .............................................. 387 * E3 e+ F! J: A. z
11.7 Closing Remarks ....................................................................... 388 / Z# z) h; U. l4 i
References ......................................................................................... 389
% \5 x0 Q' E2 M9 A& E9 l* rAppendices 6 n5 A; o# F4 l B" ]
Appendix 1. Change in Molar Gibbs Free Energy Calculations ......... 391 7 e$ e) {3 q6 b1 E; k5 d# F o+ g/ t
A1.1 Hydrogen Fuel Cell ........................................................ 391 3 L- W9 \% G' a2 `- K$ o6 \
A1.2 The Carbon Monoxide Fuel Cell .................................... 393 ! L+ r1 T# e& Q& M9 }. O, X5 ^9 l2 ?+ e9 A
References ............................................................................. 394 % m& }+ [5 `8 V4 v3 [; a0 X) U! H
Appendix 2. Useful Fuel Cell Equations ............................................. 395
% U, r3 m. ?" i5 TA2.1 Introduction .................................................................... 395
. k1 A* B% B3 V) o, ~' U' {; i. mA2.2 Oxygen and Air Usage ................................................... 396 3 J# k& [( l8 ?# a0 _1 s
A2.3 Air Exit Flow Rate .......................................................... 397
6 j/ z& [* N, [A2.4 Hydrogen Usage ............................................................ 398
6 m8 K$ \' J5 H% HA2.5 Water Production ........................................................... 399
9 W" T/ q! M) K( OA2.6 Heat Produced ............................................................... 399 9 m# f$ ~0 \% G Y+ t9 ^% Q8 K0 L
Index ............................................................................................... 401 |
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