Energy in the United States
The United States was the second-largest energy consumer in 2010 (after China) considering total use. The nation is ranked seventh in energy consumption per-capita after Canada and several small nations. Not included is the significant amount of energy used overseas in the production of retail and industrial goods consumed in the U.S.
Most of this energy comes from fossil fuels: in 2010, data showed that 25% of the nation's energy originates from petroleum, 22% from coal, and 22% from natural gas. Nuclear power supplied 8.4% and renewable energy supplied 8%, mainly from hydroelectric dams and biomass; however, this also includes other renewable sources like wind power, geothermal, and solar energy. As of 2006, energy consumption had increased more rapidly than domestic energy production over the last 50 years in the nation (when they were roughly equal). This difference was largely met through imports.
According to the Energy Information Administration's statistics, the per-capita energy consumption in the US has somewhat been consistent from the 1970s to the present time. The average was about 334 million British thermal units (BTUs) per person from 1980 to 2010. One explanation suggested that the energy required to increase the nation's consumption of manufactured equipment, cars, and other goods has been shifted to other countries producing and transporting those goods to the US with a corresponding shift of green house gases and pollution. In comparison, the world average increased from 63.7 in 1980 to 75 million BTUs per person in 2008.
From its founding until the late 18th century, the United States was a largely agrarian country with abundant forests. During this period, energy consumption overwhelmingly focused on readily available firewood. Rapid industrialization of the economy, urbanization, and the growth of railroads led to increased use of coal, and by 1885 it had eclipsed wood as the nation's primary energy source.
Coal remained dominant for the next seven decades, but by 1950, it was surpassed in turn by both petroleum and natural gas. The 1973 oil embargo precipitated an energy crisis in the United States. In 2007, coal consumption was the highest it has ever been, with it mostly being used to generate electricity. Natural gas has replaced coal as the preferred source of heating in homes, businesses and industrial furnaces, which burns cleaner and is easier to transport.
Although total energy use increased by approximately a factor of 50 between 1850 and 2000, energy use per capita increased only by a factor of four. As of 2009, United States per capita energy use had declined to 7075 (kilograms of oil-equivalent), 12% less than 2000, and in 2010 to levels not seen since the 1960s. At the beginning of the 20th century, petroleum was a minor resource used to manufacture lubricants and fuel for kerosene and oil lamps. One hundred years later it had become the preeminent energy source for the United States and the rest of the world. This rise closely paralleled the emergence of the automobile as a major force in American culture and the economy.
While petroleum is also used as a source for plastics and other chemicals, and powers various industrial processes, today two-thirds of oil consumption in the U.S. is in the form of its derived transportation fuels. Oil's unique qualities for transportation fuels in terms of energy content, cost of production, and speed of refueling all contributed to it being used over other fuels.
In June 2010, the American Energy Innovation Council, a group which includes Bill Gates, founder of Microsoft; Jeffrey R. Immelt, chief executive of General Electric; and John Doerr, has urged the government to more than triple spending on energy research and development, to $16 billion a year. Gates endorsed the administration's goal of reducing greenhouse gas emissions by 80 percent by 2050, but said that was not possible with today's technology or politicism. He said that the only way to find such disruptive new technology was to pour large sums of money at the problem. The group notes that the federal government spends less than $5 billion a year on energy research and development, not counting one-time stimulus projects. About $30 billion is spent annually on health research and more than $80 billion on military research and development. They advocate a jump in spending on basic energy research.
Note: Sum of components may not equal 100 percent due to independent rounding.
Primary energy consumption
Primary energy use in the United States was 25,155 TWh or about 81,800 kWh per person in 2009. Primary energy use was 1,100 TWh less in the United States than in China in 2009. The share of energy import was 26% of the primary energy use. The energy import declined about 22% and the annual CO2 emissions about 10% in 2009 compared to 2004.
Energy consumption by source
|Fuel type||United States||World|
solar, wood, waste
Oil is one of the largest sources of energy in the United States. The United States influences world oil reserves for both growth and development. As the 20th century progressed, petroleum gained increasing importance by providing heating and power to the commercial and industrial sectors. Oil was also used in transportation; first for railroads and later for motor vehicles.
As automobiles became more affordable, demand for oil quickly rose. Since the rise of the automobile industry, oil price, demand, and production have all increased as well. Between 1900 and 1980, fuel was directly correlated with Gross National Product (GNP). Furthermore, oil shocks have often coincided with recessions, and the government has responded to oil shocks in several ways. In the 1920s, oil prices were peaking and many commentators believed that oil supplies were running out. Congress was confronted by requests to augment supplies, so a generous depletion allowance was enacted for producers in 1926, which increased investment returns substantially. This change induced additional exploration activity, and subsequently the discovery of large new oil reservoirs.
The next decade the situation was reversed, with prices low and dropping. This resulted in demands for more "orderly" competition and set minimum oil prices. Rather than repealing the previous policies enacted in the 1920s, Congress enacted a price-support system. Similar cycles have occurred in the 1950s and '70s.
Natural gas was the largest source of energy production in the United States in 2016, representing 33 percent of all energy produced in the country. Natural gas has been the largest source of electrical generation in the United States since July 2015.
The United States has been the world's largest producer of natural gas since 2009, when it surpassed Russia. US Natural gas production achieved new record highs for each year from 2011 through 2015. Marketed natural gas production in 2015 was 28.8 trillion cubic feet, a 5.4% increase over 2014, and a 52% increase over the production of 18.9 trillion cubic feet per day in 2005.
Because of the greater supply, consumer prices for natural gas are significantly lower in the United States than in Europe and Japan. The low price of natural gas, together with its smaller carbon footprint compared to coal, has encouraged a rapid growth in electricity generated from natural gas.
Between 2005 and 2014, US production of natural gas liquids (NGLs) increased 70%, from 1.74 million barrels per day in 2005 to 2.96 million barrels per day in 2014. The US has been the world's leading producer of natural gas liquids since 2010, when US NGL production passed that of Saudi Arabia.
Although the United States leads the world in natural gas production, it is only fifth in proved reserves of natural gas, behind Russia, Iran, Qatar, and Turkmenistan.
Generation of electricity is the largest user of coal, although its use is in decline. About 50% of electric power was produced by coal in 2005, declining to 30% in 2016.:1 Electric utilities buy more than 90% of the coal consumed in the United States.
Coal has been used to generate electricity in the United States since an Edison plant was built in New York City in 1882. The first AC power station was opened by General Electric in Ehrenfeld, Pennsylvania in 1902, servicing the Webster Coal and Coke Company. By the mid-20th century, coal had become the leading fuel for generating electricity in the US. The long, steady rise of coal-fired generation of electricity shifted to a decline after 2007. The decline has been linked to the increased availability of natural gas, decreased consumption, renewable power, and more stringent environmental regulations. The Environmental Protection Agency has advanced restrictions on coal plants to counteract mercury pollution, smog, and global warming.
Final energy consumption
Consumption by sector
The U.S. Department of Energy tracks national energy consumption in four broad sectors: industrial, transportation, residential, and commercial. The industrial sector has long been the country's largest energy user, currently representing about 33% of the total. Next in importance is the transportation sector, followed by the residential and commercial sectors.
Household energy use varies significantly across the United States. An average home in the Pacific region (consisting of California, Oregon, and Washington) consumes 35% less energy than a home in the South Central region. Some of the regional differences can be explained by climate. The heavily populated coastal areas of the Pacific states experience generally mild winters and summers, reducing the need for both home heating and air conditioning. The warm, humid climates of the South Central and South Atlantic regions lead to higher electricity usage, while the cold winters experienced in the Northeast and North Central regions result in much higher consumption of natural gas and heating oil. The state with the lowest per capita energy use is New York, at 205 million Btu/yr, and the highest is Wyoming, at slightly over 1 billion Btu/yr.
Other regional differences stem from energy efficiency measures taken at the local and state levels. California has some of the strictest environmental laws and building codes in the country, leading its per-household energy consumption to be lower than all other states except Hawaii.
The land-use decisions of cities and towns also explain some of the regional differences in energy use. Townhouses are more energy efficient than single-family homes because less heat, for example, is wasted per person. Similarly, areas with more homes in a compact neighborhood encourage walking, biking and transit, thereby reducing transportation energy use. A 2011 U.S. E.P.A. study found that multi-family homes in urban neighborhoods, with well-insulated buildings and fuel-efficient cars, can save more than 2/3 of the energy used by conventionally built single-family houses in suburban areas (with standard cars).
The United States is the world's second largest producer and consumer of electricity. It consumes about 20% of the world's electricity supply. This section provides a summary of the consumption and generation of the nation's electric industry, based on data mined from US DOE Energy Information Administration/Electric Power Annual 2015 files. Data was obtained from the most recent DOE Energy Information Agency (EIA) files. Consumption is detailed from the residential, commercial, industrial, and other user communities. Generation is detailed for the major fuel sources of coal, natural gas, nuclear, petroleum, hydro, and the other renewables of wind, wood, other biomass, geothermal, and solar. Changes to the electrical energy fuel mix and other trends are identified. Progress in wind and solar contributing to the energy mix are addressed. Expected changes in the generation environment during the next 5 years are discussed.
Electricity consumption data in this section is based upon data mined from US DOE Energy Information Administration/Electric Power Annual 2016 files In 2016 the total US consumption of electricity was 4,137.1 terawatt-hours (TWh). Consumption was essentially flat from 2015, with a 6 TWh or 0.15% drop. This is broken down as:
- Residential customers (131.07 million) directly consumed 1,411.1 TWh, or 34.11% of the total. This was up 7 TWh from 2015. An average residential customer used 897.2 kWh/month and with the average US residential cost of $0.1255/kWh the average monthly electrical bill would be $112.59, down slightly from 2015.
- Commercial customers (18.148 million) directly consumed 1,367.2 TWh or 33.05% of the total. This was just a little more (6.44 TWh) than in 2015. An average commercial customer used 6,278 kWh/month and with the average US commercial electric cost of $0.1043/kWh the average monthly electrical bill would be $654.78, down slightly from 2015.
- Industrial customers (about 838,100) directly consumed 976.7 TWh or 23.61% of the total. This was a little less than in 2015 (-1.0%).
- Transportation customers (86) directly consumed 7.50 TWh or 0.18% of the total. This was a little lower (0.14 TWh) than in 2015.
- System loss throughout the total electrical grid infrastructure by direct use of the suppliers (139.8 TWh) and for transmission and other system losses and for unaccounted for loads (234.8 TWh) amounts to 374.6 TWh or 9.1% of the total which is down by 0.2% from 2015. Thus, the US electric distribution system is 90.94% efficient and efficiency has improved over the last year.
The following table derived from data mined from Electric Power Annual. identifies those states which must import electrical energy from neighboring states to meet their consumption needs. Each state's total electric generation for 2016 is compared with the states consumption and its share of the system loss and the difference between the generated electric energy and its total consumption (including its share of the system loss) is the amount of energy it imports. For Hawaii (HI) total consumption equals generated energy. For the other states, multiplying their direct consumption by 1.099688991 (4127150643/3753016241), results in United States supply (including net imports) being equal to the country's total consumption. The following chart provides the details. The graphic shows each import states situation with respect to electric energy consumption being greater than its generation.
United States net imports were 60.27 TWh, for a total of 4,137.1 TWh of electrical energy use. Electrical energy generated from coal was 1,239.15 TWh (29.95%); Natural and other Gases, 1,391.11 TWh (33.63%); Nuclear, 805.69 TWh (19.47%); Hydro, 269.81 TWh (6.47%); Renewables (other than Hydro), 341.64 TWh (8.26%); Imports less exports, 60.27 TWh (1.46%); Petroleum, 24.20 TWh (0.59%); and Misc (including pumped storage) 7.22 TWh (0.18%). United States renewable sources (hydro reported separately) are wind, 226.99 TWh (5.49%); wood, 40.95 TWh (0.99%); other biomass, 21.81 TWh (0.53% ); geothermal, 15.83 TWh (0.38%) and solar, 36.05 TWh (0.87%). Small scale solar is estimated to have produced an additional 12.77 TWh. Natural gas electricity generation exceeded generation from coal for the first time in 2016.
|Power Source||Generators||Summer Capacity (GW)||% of total Capacity||Capacity factor||Annual Energy (TWh)||% of Total US|
|Power source||Summer capacity (GW)||% of renewable capacity||% of total capacity||Capacity factor||Total generation (TWh)||% of renewable energy||% of total|
Note: Biomass includes wood and wood derived fuel, landfill gas, biogenic municipal solid waste and other waste biomass.
Electricity generation by source
States imports and exports
Using the data from the US DOE Energy Information Administration/Electric Power Annual 2015 files Data was obtained from the most recent DOE Energy Information Agency (EIA) full year files. The following table derived from data mined from Electric Power Annual . identifies those states which generate more electrical energy than they need to meet their consumption needs. They supply those that need additional energy. Each states total electric generation for 2016 is compared with the states consumption and its share of the system loses and the difference between the generated electric energy and its total consumption (including its share of the system loses) is the amount of energy it exports. For Hawaii (HI), total consumption equals generated energy. For the other states multiplying their direct consumption by 1.1099688991 (4127150643/3753016241) results in United States supply (including net imports) being equal to the country's total consumption usage. State export is determined by subtracting the state's total consumption from its generation.
Renewable energy in the United States accounted for 13.2 percent of the domestically produced electricity in 2014, and 11.2 percent of total energy generation. As of 2014, more than 143,000 people work in the solar industry and 43 states deploy net metering, where energy utilities buy back excess power generated by solar arrays.
Renewable energy reached a major milestone in the first quarter of 2011, when it contributed 11.7 percent of total U.S. energy production (2.245 quadrillion BTUs of energy), surpassing energy production from nuclear power (2.125 quadrillion BTUs). 2011 was the first year since 1997 that renewables exceeded nuclear in US total energy production.
Hydroelectric power is currently the largest producer of renewable power in the U.S. It produced around 6.2% of the nation's total electricity in 2010 which was 60.2% of the total renewable power in the U.S. The United States is the fourth largest producer of hydroelectricity in the world after China, Canada and Brazil. The Grand Coulee Dam is the 5th largest hydroelectric power station in the world.
U.S. wind power installed capacity now exceeds 65,000 MW and supplies 4% of the nation's electricity. Texas is firmly established as the leader in wind power development, followed by Iowa and California.
The U.S. has some of the largest solar farms in the world. Solar Star is a 579 megawatt (MWAC) farm near Rosamond, California. The Desert Sunlight Solar Farm is a 550 MW solar power plant in Riverside County, California and the Topaz Solar Farm, a 550 MW photovoltaic power plant, is in San Luis Obispo County, California. The solar thermal SEGS group of plants in the Mojave Desert has a total generating capacity of 354 MW.
The development of renewable energy and efficient energy use marks "a new era of energy exploration" in the United States, according to President Barack Obama. Studies suggest that if there is enough political will it is feasible to supply the total United States with 100% renewable energy by 2050.
Trends and projections
In 2015 electrical energy usage in the United States was 1.6% more than in 2005 and 1% less than the peak in 2007. Per capita consumption has decreased about 7% since its peak in 2007 and every year since has shown a decrease in individual consumption. Conservation efforts are helping. At least, for the next decade, coal, natural gas, and nuclear will remain the top three fuels for electric energy generation in the USA. Coal will continuously decrease its contribution with natural gas increasing its contribution. Nuclear will have some downs (decommissionings) and ups (new online plants) but probably remain about constant. Hydro will maintain. Petroleum will continue to decrease in importance. Wind and solar will continue to grow in importance; their combined generation was 5.29% of US electric generation for 2015 or 5.20% of total US consumption.
From the beginning of the United States until 1973, total energy (including electrical) use increased by about 3%/year, while population increased an average of 2.2%/year. Per capita energy use from 1730 to 1870 was about 100 million Btu/person. In the 20th century this increased to 300 million (332 million Btu/person/year, 97 thousand kWh/person/year in 1981).
Efficiency improvements could cause energy use to drop considerably.
A concentrating solar array (CSP) with thermal storage has a practical capacity factor of 33% and could provide power 24 hours a day. Prior to 2012, in six southwestern states (Arizona, California, Colorado, Nevada, New Mexico, and Utah) the US Bureau of Land Management (BLM) owned nearly 98 million acres (an area larger than the state of Montana) that was open to proposals for solar power installations. To streamline consideration of applications, the BLM produced a Programmatic Environmental Impact Statement (PEIS). By the subsequent Record of Decision in October 2012, the BLM withdrew 78 percent of its land from possible solar development, leaving 19 million acres still open to applications for solar installations, an area nearly as large as South Carolina. Of the area left open to solar proposals, the BLM has identified 285 thousand acres in highly favorable areas it calls Solar Energy Zones. In Spain, with natural gas backups, CSP has reached a capacity factor of 66%, with 75% being a theoretical maximum.
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