Acknowledgements .......................................... XIII
Prologue .................................................... XV
Part I Questions
Introduction ................................................. 3
Recommended Reading .......................................... 4
1 Ancient Days and Modern Times ................................ 5
Recommended Reading .......................................... 7
2 Ice Ages-Past and Future ..................................... 9
The Discovery of Ice Ages .................................... 9
The Heat Balance of the Earth ............................... 10
The Sun and Its Spots ....................................... 11
Earth's Orbit ............................................... 14
The Discovery of Elliptical Orbits .......................... 15
Precession .................................................. 16
Nutation (Wobble) ........................................... 18
Volcanic Dust ............................................... 20
The Cyclical Nature of Ice Ages ............................. 20
The Croll-Milankovic Theory of Ice Ages ..................... 21
Recommended Reading ......................................... 23
3 Global Warming Versus Returning Glaciers .................... 25
Infrared Radiation and Absolute Temperature ................. 27
Greenhouse Gases and Global Warming: Fourier, Tyndall, and
Arrhenius ................................................... 28
CO2 and Methane ............................................. 29
The Big Picture ............................................. 31
Recommended Reading ......................................... 35
4 Earth's Fossil Fuel Supply .................................. 37
Limits of Fossil Fuels ...................................... 38
Coal ........................................................ 39
Natural Gas ................................................. 39
Hydrated Natural Gas ........................................ 40
Oil ......................................................... 40
Sequestration of CO2 ........................................ 42
CO2 Level Calculations ...................................... 43
The Unending Carbon Cycle ................................... 43
Recommended Reading ......................................... 45
5 Nuclear Power ............................................... 47
Origin of Fuel for Nuclear Fission .......................... 47
The Energy in Nuclear Fuel .................................. 48
Nuclear Energy .............................................. 49
Isotopes .................................................... 50
Limits of Nuclear Fuel ...................................... 51
The Basics of Nuclear Fission ............................... 52
Evolution of Nuclear Reactors ............................... 53
Present-day Nuclear Reactors and Power Plants ............... 54
Used Fuel Rods .............................................. 56
Radiation, Radioactivity, and Health ........................ 57
Natural Radiation and Radioactive Waste ..................... 58
Disposal and Storage of Nuclear Waste ....................... 59
Recommended Reading ......................................... 60
Part II Answers
Introduction ................................................ 63
6 Solar Energy ................................................ 65
Using Solar Energy .......................................... 66
Development of Solar Cells .................................. 68
How Solar Cells Work ........................................ 69
Multiple-layer Solar Cells .................................. 71
Solar Concentrators and Solar Thermal Systems ............... 75
Solar Ponds ................................................. 76
Solar-powered Air Conditioning .............................. 77
Solar Updraft Towers ........................................ 78
Solar Power Towers .......................................... 79
Other Thoughts and Possibilities ............................ 79
Recommended Reading ......................................... 80
7 Wind, Waves, and Tides ...................................... 81
Wind ........................................................ 81
Characteristics and Limits of Wind Machines ................. 83
Tides ....................................................... 86
Newton, the Moon, and the Tides ............................. 87
Harnessing Tidal Power ...................................... 87
Usable Tidal Energy ......................................... 89
Tidal Currents .............................................. 90
Waves ....................................................... 91
Recommended Reading ......................................... 93
8 Going with the Flow: Water, Dams, and Hydropower ............ 95
Basics of Hydroelectric Power ............................... 96
Water Turbines .............................................. 98
Hydropower Problems ......................................... 99
Hydropower Schemes .......................................... 99
Dam-less Hydropower: Evaporation Schemes ................... 100
Dam-less Hydropower: Flowing Water ......................... 102
Recommended Reading ........................................ 103
9 Geothermal Energy: Energy from the Earth Itself ............ 105
Geothermal Energy .......................................... 105
The Structure of the Earth ................................. 106
Carnot's Unbreachable Thermodynamic Limit .................. 109
Using Water and Soil in Heating and Cooling Systems ........ 110
Recommended Reading ........................................ 112
10 Efficiency, Conservation, and Hybrid Cars .................. 113
Efficiency of Fossil Fuel and Nuclear Power Plants ......... 114
Cars, Trucks, Trains, Ships, and Planes .................... 118
Conservation ............................................... 120
Recommended Reading ........................................ 121
11 Energy Storage: Macro to Micro ............................. 123
Pumped Hydropower .......................................... 124
Compressed Air ............................................. 124
Batteries .................................................. 126
Flywheels .................................................. 129
Capacitors and Dielectrics ................................. 130
Inductors: Storing Energy with Magnetic Fields ............. 132
Recommended Reading ........................................ 133
12 Green Fuel: Biodiesel, Alcohol, and Biomass ................ 135
Biodiesel .................................................. 138
Recommended Reading ........................................ 142
Part III Dreams
Introduction ............................................... 145
13 Breeding Nuclear Fuel ...................................... 147
Fast Breeder Reactors ...................................... 148
Clinch River Breeder Reactor Project ....................... 150
Thermal Breeder Reactors ................................... 151
Breeder Technology Today and Tomorrow ...................... 152
Recommended Reading ........................................ 153
14 Nuclear Fusion: Engine of the Sun .......................... 155
Cold Fusion versus Cool Fusion versus Hot Fusion ........... 155
Making Fusion Happen ....................................... 157
ITER, Tokamaks, Magnetic Fields, and Fusion ................ 158
The Combined Fusion-Breeding-Fission Process ............... 160
Inertial Confinement Fusion ................................ 161
Accelerator Fusion ......................................... 161
Fusion of Helium-3 and Deuterium ........................... 162
Lunar Resources of Helium-3 ................................ 163
Recommended Reading ........................................ 165
15 Power from the Ocean: Thermal and Salinity Gradients ....... 167
Electric Power from Ocean Thermal Gradients ................ 167
Electric Power from Ocean Salinity Gradients ............... 172
Recommended Reading ........................................ 176
16 Fuel Cells: Hydrogen, Alcohol, and Coal .................... 177
Fuel Cells and Hydrogen .................................... 177
Fuel Cell Efficiency ....................................... 179
Fuel Cells and Cars ........................................ 180
Storing Hydrogen ........................................... 182
Producing Hydrogen ......................................... 184
Technologies for Hydrogen Production ....................... 184
Fuel Cells and Coal ........................................ 186
Fuel Cells and Alcohol ..................................... 187
What Happens Now? .......................................... 187
Recommended Reading ........................................ 188
17 Magnetohydrodynamics and Power Plants ...................... 189
Faraday Induction and the Hall Effect ...................... 190
Benefits of MHD Power Generation ........................... 192
Recommended Reading ........................................ 193
18 Thermionics and the Single Fuel Home ....................... 195
How a Thermionic Converter Works ........................... 196
Engineering Thermionic Systems ............................. 197
Recommended Reading ........................................ 201
19 Artificial Photosynthesis and Water Splitting .............. 203
Plant Chemistry ............................................ 205
Artificial Photosynthesis and Water Splitting .............. 206
Recommended Reading ........................................ 208
20 Planetary Engineering and Terraforming ..................... 209
Changing Earth's Albedo: Atmospheric Aerosols .............. 210
Tinkering with Planet Earth ................................ 211
Parasols, Artificial Sunspots, Space Mirrors,
Solar Sails, and Space Dust ............................. 212
White Roads, Reflecting Roofs, and Shiny Balloons .......... 213
Back to Clouds Again ....................................... 213
Feeding Algae .............................................. 214
Terraforming Mars (and Maybe Venus) ........................ 215
What Can Be Done? .......................................... 217
Recommended Reading ........................................ 218
21 Space Solar Power: Energy and the Final Frontier ........... 219
Lagrange and His Famous Points ............................. 219
Geosynchronous Orbits and Solar Sails ...................... 221
Beamed-power Microwave Transmission ........................ 222
Space Elevators ............................................ 223
Electromagnetic Launching .................................. 226
Recommended Reading ........................................ 227
Part IV Nightmares
Introduction ............................................... 231
22 Alternative Futures ........................................ 233
Epilogue: ORBITuary ........................................ 237
Credits .................................................... 239
Appendix I ................................................. 241
Units for Energy and Power ................................. 241
Appendix II ................................................ 243
Radiation Units ............................................ 243
Index ...................................................... 245
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