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Average Heat Rates by Prime Mover and Energy Source
                     
Table A6.    xls     pdf   format     

Table A6. Average Heat Rates by Prime Mover and Energy Source, 2006
(Btu per kilowatthour)
Prime Mover Coal Petroleum Natural Gas Nuclear
Steam Turbine 10,164 10,424 10,490 10,434
Gas Turbine -- 13,155 11,664 --
Internal Combustion -- 10,179 9,947 --
Combined Cycle W 11,015 7,502 --
  W = Withheld to avoid disclosure of individual company data.
  Note: Heat rate is reported at full load conditions for electric utilities and independent power producers. See Glossary reference for definitions. Totals may not equal sum of components because of independent rounding.
  Source: Energy Information Administration, Form EIA-860, "Annual Electric Generator Report."

see also:
Electric Power Monthly
Electric Power Annual
annual electricity statistics back to 1949
projected electricity capacity to 2030
international electricity statistics