Listed below are all documents and RMI.org site pages related to this topic.
The U.S. electricity sector has seen tremendous growth in the past 60 years. From 1949 to 2009, U.S. electricity consumption increased by a factor of 13. To meet this rising demand, the U.S has built vast amounts of new electricity generating infrastructure. The total U.S. installed capacity in 2009 was 998 GW, compared with just 65 GW in 1949.
Increased adoption of energy efficient technologies as well as cogeneration and waste heat recovery systems will reduce energy use by an additional 4.7 quadrillion BTUs from business-as-usual. These and other changes (energy changes due fuel switching or transformation in other sectors) can reduce projected primary energy use by 27% in 2050.
Electricity is 75% of primary energy consumed by U.S. buildings, but 68% of that electricity is lost in conversion and delivery. Oil and natural gas are almost 10 quads of energy, or 25% of total primary energy.
Fossil fuel combustion harms air quality and human health. A 2010 study by the Clean Air Task Force estimated that air pollution from coal-fired power plants accounts for more than 13,000 premature deaths, 20,000 heart attacks, and 1.6 million lost workdays in the U.S. each year. The total monetary cost of these health impacts is over $100 billion annually.
In Reinventing Fire
, natural gas consumption in 2050 is reduced by 36% relative to business-as-usual. This reduction is primarily enabled by improved efficiency in commercial and residential buildings and less reliance on natural gas in the electricity sector.
In 2005, half of U.S. water withdrawals were made by the electricity sector. A “business-as-usual” U.S. electricity future will increase reliance on large thermal power plants and keep water demands high.
In Reinventing Fire
, Rocky Mountain Institute investigates the implications of four radically different future electricity scenarios - from a “business-as-usual” case to a network of intelligent microgrids powered largely by distributed renewables.
Despite large aggregate expenditures on buildings, average U.S. consumers spend only ~4% of their total budget on fuel and electricity bills. Consumers have little incentive to reduce their energy bills, despite a variety of ways to do so profitably.
While U.S. demand for electricity has risen in all but four years since 1949, the rate of increase has been steadily trending down. The Energy Information Administration predicts an annual growth rate around +1% to 2030 (which RMI extrapolates to 2050). Successfully implementing the energy efficiency improvements in buildings and industry discussed in Reinventing Fire
could reduce this to a steady –1%.
Premium-efficiency motors are normally assumed to cost more because they use more and better copper and iron. Yet analysis of all models on the 2010 U.S. market, in this case for 250 hp (TEFC, NEMA Type B) shows this is untrue despite standards’ having knocked the least efficient models off the market.