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Americans continue to use more renewable energy sources

By R&D Editors | July 22, 2013

Americans used more natural gas, solar panels and wind turbines and less coal to generate electricity in 2012, according to the most recent U.S. energy charts released by Lawrence Livermore National Laboratory.

Each year, the Laboratory releases energy flow charts that track the nation’s consumption of energy resources.

Natural gas use is up particularly in the electricity generation sector, where it has basically substituted directly for coal, while sustained low natural gas prices have prompted a shift from coal to gas in the electricity generating sector, according to A.J. Simon, an LLNL energy systems analyst.

The rise in renewables is tied to both prices (the underlying cost of solar panels and wind turbines has gone down) and policy (government incentives to installers of equipment or renewable energy targets in various states), Simon said.

Overall, Americans used 2.2 quadrillion BTU, or quads, less in 2012 than the previous year (BTU or British Thermal Unit is a unit of measurement for energy; 3,400 BTU is equivalent to about 1 kW-hr).

Once again, wind power saw the highest percentage gains, going from 1.17 quads produced in 2011 up to 1.36 quads in 2012. New wind farms continue to come on line with bigger, more efficient turbines that have been developed in response to government-sponsored incentives to invest in renewable energy.

Solar also jumped from 0.158 quads in 2011 to 0.235 quads in 2012. Extraordinary declines in prices of photovoltaic panels, due to global oversupply, drove this shift.

This is the first year in at least a decade where there has been a measurable decrease in nuclear energy.

“It is likely to be a permanent cut as four nuclear reactors recently went offline (two units at San Onofre in California as well as the power stations at Kewaunee in Wisconsin and Crystal River in Florida),” Simon said. “There are a couple of nuclear plants under construction, but they won’t come on for another few years.”

Coal and oil use dropped in 2012 while natural gas use jumped to 26 quads from 24.9 quads the previous year. There is a direct correlation between a drop in coal electricity generation and the jump in electricity production from natural gas.

The majority of energy use in 2012 was used for electricity generation (38.1 quads), followed by transportation, industrial, residential and consumption. However, energy use in the residential, commercial and transportation sectors decreased while industrial energy use increased slightly.

See the 2012 energy flow chart.

Source: Lawrence Livermore National Laboratory

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