Table 3.22. Useful Thermal Output by Energy Source: Electric Power Sector Combined Heat and Power, 2002 - 2012
(Billion Btus)

Period Coal Petroleum
Liquids
Petroleum
Coke
Natural
Gas
Other
Gas
Renewable
Sources
Other Total
Annual Totals
2002 40,020 1,319 2,550 214,137 5,961 12,550 4,732 281,269
2003 38,249 5,551 1,828 200,077 9,282 19,785 3,296 278,068
2004 39,014 5,731 2,486 239,416 18,200 17,347 3,822 326,017
2005 39,652 5,571 2,238 239,324 36,694 18,240 3,884 345,605
2006 38,133 4,812 2,253 207,095 22,567 17,284 4,435 296,579
2007 38,260 5,294 1,862 212,705 20,473 19,166 4,459 302,219
2008 37,220 5,479 1,353 204,167 22,109 17,052 4,854 292,234
2009 38,015 5,341 1,445 190,875 19,830 17,625 5,055 278,187
2010 38,325 4,702 1,108 186,772 19,707 17,589 5,040 273,244
2011 35,209 4,484 1,231 190,712 20,435 16,029 6,044 274,143
2012 26,093 4,405 1,246 200,294 20,948 16,369 5,545 274,900
2010
January 3,790 443 116 16,624 1,717 1,660 394 24,745
February 3,505 271 121 14,780 1,598 1,574 367 22,215
March 3,469 202 137 15,718 1,738 1,595 391 23,250
April 2,859 382 94 14,056 1,735 1,274 407 20,807
May 2,828 421 105 14,931 1,709 1,183 333 21,510
June 3,017 403 83 15,064 1,639 1,434 450 22,090
July 3,306 404 87 17,574 1,671 1,390 455 24,888
August 3,215 411 19 17,185 1,669 1,421 465 24,384
September 2,966 398 27 15,517 1,631 1,292 429 22,259
October 2,881 417 100 14,262 1,302 1,514 408 20,885
November 3,049 522 125 14,761 1,615 1,560 420 22,053
December 3,440 427 95 16,301 1,682 1,692 522 24,159
2011
January 3,424 410 55 16,673 1,708 1,727 550 24,547
February 3,031 312 92 15,005 1,594 1,555 521 22,108
March 3,095 334 122 15,548 1,854 1,329 546 22,828
April 2,804 376 102 14,699 1,625 998 419 21,023
May 3,122 371 119 14,857 1,735 1,223 533 21,960
June 2,756 372 102 15,092 1,601 1,248 527 21,699
July 3,057 393 119 18,064 1,718 1,341 514 25,206
August 2,975 410 116 17,845 1,683 1,278 477 24,785
September 2,753 401 114 15,831 1,748 1,274 452 22,571
October 2,788 391 86 14,690 1,693 1,313 491 21,451
November 2,530 370 94 15,247 1,660 1,337 454 21,692
December 2,874 344 112 17,161 1,817 1,405 560 24,273
2012
January 2,725 514 122 17,364 1,820 1,457 454 24,454
February 2,268 350 118 15,957 1,730 1,345 449 22,217
March 2,127 235 114 14,749 1,906 1,533 529 21,193
April 1,623 291 95 15,972 1,739 1,094 440 21,254
May 2,208 381 120 17,100 1,629 1,117 420 22,974
June 2,155 400 63 17,381 1,669 1,342 468 23,476
July 2,304 360 103 18,668 1,770 1,254 429 24,888
August 2,415 370 105 18,647 1,785 1,355 486 25,163
September 2,203 355 104 16,124 1,736 1,237 447 22,206
October 2,180 387 98 15,749 1,750 1,505 456 22,125
November 1,954 377 98 15,033 1,575 1,536 468 21,041
December 1,932 384 107 17,550 1,840 1,596 500 23,909

Coal includes anthracite, bituminous, subbituminous, lignite, and waste coal; synthetic coal and refined coal; and beginning in 2011, coal-derived synthesis gas. Prior to 2011 coal-derived synthesis gas was included in Other Gases.
Petroleum Liquids includes distillate and residual fuel oils, jet fuel, kerosene, waste oil, and beginning in 2011, propane. Prior to 2011 propane was included in Other Gases.
Petroleum Coke includes petroleum coke-derived synthesis gas. Prior to 2011, petroleum coke-derived synthesis gas was included in Other Gases.
Other Gas includes blast furnace gas and other manufactured and waste gases derived from fossil fuels. Prior to 2011, Other Gas included propane and synthesis gases.
See the Technical Notes for fuel conversion factors.
Renewable Sources include wood, black liquor, other wood waste, biogenic municipal solid waste, landfill gas, sludge waste, agriculture byproducts, other biomass, geothermal, and solar thermal.
Other includes non-biogenic municipal solid waste, batteries, hydrogen, purchased steam, sulfur, tire-derived fuel, and other miscellaneous energy sources.
Notes: Beginning with 2001 data, non-biogenic municipal solid waste and tire-derived fuels are reclassified as non-renewable energy sources and included in Other. Biogenic municipal solid waste is included in Other Renewable Sources.
Beginning with the collection of Form EIA-923 in January 2008, the methodology for separating the fuel used for electricity generation and useful thermal output from combined heat and power plants changed. The new methodology was retroactively applied to 2004-2007. See the Technical Notes (Appendix C) for further information.
See Glossary for definitions. Values are final. See Technical Notes for a discussion of the sample design for the Form EIA-923 and predecessor forms.
Totals may not equal sum of components because of independent rounding. NM=Not meaningful due to large standard error. W=Withheld to avoid disclosure of individual company data.
Sources: U.S. Energy Information Administration, Form EIA-923, Power Plant Operations Report; U.S. Energy Information Administration, Form EIA-906, Power Plant Report; U.S. Energy Information Administration, Form EIA-920 Combined Heat and Power Plant Report; and predecessor forms.
Beginning with 2008 data, the Form EIA-923, Power Plant Operations Report, replaced the following: Form EIA-906, Power Plant Report; Form EIA-920, Combined Heat and Power Plant Report;
Form EIA-423, Monthly Cost and Quality of Fuels for Electric Plants Report; and Federal Energy Regulatory Commission, FERC Form 423, Monthly Report of Cost and Quality of Fuels for Electric Plants.