Energy Fundamentals, Energy Use in an Industrial Society
Energy Fundamentals, Energy Use in an Industrial Society
1Introduction Energy enters our lives in many different ways Energy in food: essential for the existence of all humankind and animals throughout our evolution on this planet Energy in engine fuel: power automobiles, heat homes manufacture products, generate electricity The fossil fuels: coal, natural gas, and oil supply most of the energy used globally(86% in the United States) These resources evolved hundreds of millions of years ago Since the beginning of the machine age, industrial societies have become increasingly dependent on fossil fuels
1. Introduction Energy enters our lives in many different ways. • Energy in food: essential for the existence of all humankind and animals throughout our evolution on this planet. • Energy in engine fuel: power automobiles, heat homes, manufacture products, generate electricity … The fossil fuels: coal, natural gas, and oil supply most of the energy used globally (86% in the United States). • These resources evolved hundreds of millions of years ago. • Since the beginning of the machine age, industrial societies have become increasingly dependent on fossil fuels
Various forms of energy consumed in the United States since 1850. QBtu means quadrillion British thermal units 100 sE8面i Hydroelectric A:5~-…- Nuclear electric Geothermal 18501860187018801890190019101920193019401950196019701980199020002010 Figure 1.1 Various forms of energy consumed in the us since 1850
Various forms of energy consumed in the United States since 1850. QBtu means quadrillion British thermal units. Figure 1.1 Figure 1.1 Various forms of energy consumed in the US since 1850
Tetrawatt(102V 6 fossil Gas Nuclear 0 70 75 Energy Consumption in the World
Energy Consumption in the World Tetrawatt (1012 W) fossil fuel
Why should we be concerned that so much of our energy is coming from fossil fuels? First. the fossil fuel resource is limited in amount On a global scale, we will have some coal for a few centuries, but natural gas and oil will be in short supply in only a few decades 300 United States O100 Founded Pyramids Roman Middle Built Empire Ag 500040003000-2000-10000+1000+2000+3000+4000+5000 Years before and after present a relatively brief time in the 10,000 year period shown centered around the only Figure 1.2 The complete exploitation of the world s fossil fuels will spar present
Why should we be concerned that so much of our energy is coming from fossil fuels? First, the fossil fuel resource is limited in amount. On a global scale, we will have some coal for a few centuries, but natural gas and oil will be in short supply in only a few decades. Figure 1.2 The complete exploitation of the world’s fossil fuels will span only a relatively brief time in the 10,000 year period shown centered around the present