End Use Total Energy Energy Sector Consumption (%) Commerical 20 natural gas 43% and household petroleum 34% electricity 22% Industry 25 natural gas 41% coal 28% petroleum 18% electricity 24% Transportation 26 petroleum 97% ( primarily gasoline) Electricity 29 coal 45% Generation petroleum 16% natural gas 15% hydropower 14% nuclear 10% As the chart indicates, we need to provide energy in a form appropriate to its end use. Conservation in all sectors can reduce energy consumption by increasing energy use efficiency. Passive and active solar technologies may efficiently provide energy for space and hot water heating (such heating accounts for 67% of total residential sector energy use). However, it is evident that these technologies will not provide energy appropriate to all end uses. The SPS promises to supply large blocks of baseload electric power that can contribute to all electricity consuming sectors. In 1976, 60% of generated electricity was consumed by the household and commercial sector; 40% was consumed by the industrial sector. A recent DOE report67 projects 1990 energy consumption at 94 to 110 quadrillion Btu, assuming 1.6% and 2.8% annual growth rates for energy consumption. In either case, electricity would be 38% of total energy consumption (versus 29% in 1976), and would make up a significantly higher portion of total energy consumption in each sector than occurs at present. The SPS could significantly contribute to U.S., and global energy self-sufficiency, but could not alone achieve it. ^Energy Supply and Demand in the Mid-Term: 1985, 1990, and 1995, DOE/EIA-0102 Order No. 476, April 1979.
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