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Earth’s Changing Environment Lecture 6

Earth’s Changing Environment Lecture 6. Global and US Energy Consumption and Production. The QBtu. Best energy unit for global scale is quadrillion Btu (QBtu) 1 QBtu = 1x10 15 Btu A Btu = British Thermal Unit. World Primary Energy Consumption (QBtu). Global 403

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Earth’s Changing Environment Lecture 6

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  1. Earth’s Changing EnvironmentLecture 6 Global and US Energy Consumption and Production

  2. The QBtu • Best energy unit for global scale is quadrillion Btu (QBtu) • 1 QBtu = 1x1015 Btu • A Btu = British Thermal Unit

  3. World Primary Energy Consumption (QBtu) • Global 403 • US 97 • Western Europe 73 • China 40 • Russia 28 • Japan 22 (2001 values)

  4. Example Problem 1 • Compare the per capita energy consumption in the US with per capita energy consumption in China. • US: 97 x 1015 Btu/ 284x106 = 342 million Btu • China: 40 x 1015 Btu/ 1.29x109 = 31 million Btu

  5. Global Energy Consumption (QBtu) • Petroleum 156 (39%) • Coal 96 (24%) • Natural Gas 93 (23%) • Hydro 27 (7%) • Nuclear 26 (6%) • Renewables 5 (1%)

  6. US Energy Consumption (QBtu) • Petroleum 38 (39%) • Coal 22 (23%) • Natural Gas 23 (24%) • Nuclear 8 (8%) • Hydroelectric 3 (3%) • Renewables 3 (3%)

  7. Example Problem 2 • Annual hydroelectric energy consumed in the US equals 209 billion kWh • Convert this value to Btu, using the conversion factor: 10,400 Btu/kWh • 2.09x1011 kwh x 1.04 x104 Btu/kWh =2.2 x1015 Btu = 2.2 QBtu

  8. Primary Energy in QBtu Production (Consumption) prod (cons) • Global 403 (403) • US 72 (97) • Western Europe 45 (73) • Japan 4 (22) • China 38 (40) • Russia 45 (28) • Saudia Arabia 20 (5) • Venezuela 9 (3) (2001 values)

  9. Fossil Fuels • Coal, Natural Gas, and Oil are fossil fuels and are the source of 85% of the primary energy used worldwide. • There is a finite supply of these resources. • Oil, the most heavily used fossil fuel, has the most limited supply

  10. US Sources of Energy (QBtu) • 56% of oil consumed in US is imported • 86% of US energy consumption is fossil fuels.

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