Table 3.23. Useful Thermal Output by Energy Source: Commerical 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 18,477 2,600 143 36,265 0 6,902 4,801 69,188
2003 22,780 2,520 196 16,955 0 8,296 6,142 56,889
2004 22,450 4,118 165 21,851 0 8,936 6,350 63,871
2005 22,601 3,518 166 20,227 0 8,647 5,921 61,081
2006 22,186 2,092 172 19,370 0.22 9,359 6,242 59,422
2007 22,595 1,640 221 20,040 0 6,651 3,983 55,131
2008 22,991 1,822 177 20,183 0 8,863 6,054 60,091
2009 20,057 1,095 155 25,902 0 8,450 5,761 61,420
2010 19,216 845 216 29,791 13 7,917 5,333 63,330
2011 17,234 687 111 24,848 14 7,433 5,988 56,314
2012 13,992 523 229 27,922 0 7,970 6,426 57,063
2010
January 2,144 116 24 2,600 1 657 398 5,940
February 1,894 100 21 2,372 1 641 340 5,369
March 1,658 25 27 2,320 1 752 403 5,186
April 1,278 36 16 2,114 1 760 456 4,661
May 1,318 50 0 1,949 1 947 644 4,909
June 1,531 51 0 2,060 1 715 501 4,859
July 1,628 152 0 2,866 1 682 505 5,833
August 1,727 110 21 3,226 1 711 532 6,327
September 1,476 37 20 2,623 1 601 431 5,189
October 1,320 17 23 2,583 1 489 455 4,887
November 1,418 30 30 2,436 1 446 342 4,704
December 1,825 123 34 2,642 1 516 327 5,467
2011
January 1,966 310 26 2,275 1 542 348 5,469
February 1,770 91 21 1,857 1 511 376 4,627
March 1,665 33 25 1,771 1 554 529 4,579
April 1,263 9 0 1,657 1 562 428 3,921
May 1,306 29 0 1,817 1 612 535 4,301
June 1,378 15 0 1,778 1 664 568 4,404
July 1,534 37 0 2,435 1 623 521 5,152
August 1,372 33 0 2,442 1 726 580 5,154
September 1,272 40 0 2,130 1 622 584 4,649
October 1,086 16 0 1,979 1 613 493 4,189
November 1,176 62 12 2,163 1 720 491 4,624
December 1,445 11 28 2,544 1 683 533 5,245
2012
January 1,539 235 29 2,378 0 681 593 5,455
February 1,340 13 25 2,289 0 624 506 4,798
March 1,216 35 23 2,179 0 613 467 4,533
April 941 6 2 2,027 0 632 456 4,063
May 1,072 8 0 2,100 0 650 580 4,410
June 1,072 15 0 2,209 0 633 609 4,539
July 1,163 113 22 2,822 0 699 537 5,356
August 1,159 30 26 2,708 0 723 579 5,224
September 1,019 8 25 2,493 0 654 558 4,757
October 950 6 27 2,324 0 723 508 4,537
November 1,152 30 24 2,204 0 626 488 4,525
December 1,369 25 26 2,190 0 712 544 4,866

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.