Table 3.21. Useful Thermal Output by Energy Source: Total Combined Heat and Power (All Sectors), 2002 - 2012
(Billion Btus)

Period Coal Petroleum
Liquids
Petroleum
Coke
Natural
Gas
Other
Gas
Renewable
Sources
Other Total
Annual Totals
2002 336,848 61,313 11,513 708,738 117,513 571,509 48,263 1,855,697
2003 333,361 68,329 16,934 610,122 110,263 632,366 54,960 1,826,335
2004 351,871 80,824 16,659 654,242 126,157 667,341 45,456 1,942,550
2005 341,806 79,362 13,021 624,008 138,469 664,691 41,400 1,902,757
2006 332,548 54,224 24,009 603,288 126,049 689,549 49,308 1,878,973
2007 326,803 50,882 25,373 554,394 116,313 651,230 46,822 1,771,816
2008 315,244 29,554 18,263 509,330 110,680 610,131 23,729 1,616,931
2009 281,557 32,591 20,308 513,002 99,556 546,974 33,287 1,527,276
2010 300,303 19,914 21,448 524,494 91,439 581,310 28,755 1,567,662
2011 286,210 15,230 21,552 535,150 103,615 586,299 31,067 1,579,124
2012 252,605 12,452 24,419 556,945 113,147 580,513 24,571 1,564,653
2010
January 27,238 2,420 1,809 46,343 7,527 49,564 1,834 136,735
February 24,966 1,988 1,887 40,962 6,706 45,274 2,142 123,926
March 25,445 1,345 1,610 43,478 7,940 50,043 2,413 132,275
April 32,199 1,472 1,556 39,957 7,688 47,082 2,356 132,311
May 22,885 1,390 1,702 41,049 7,682 46,789 2,572 124,070
June 22,929 1,265 1,861 41,350 7,880 47,068 2,598 124,950
July 24,483 1,631 1,791 47,085 7,573 48,956 2,503 134,022
August 24,539 1,417 1,788 47,723 8,061 49,145 2,653 135,328
September 22,849 1,303 1,782 43,318 7,552 47,918 2,379 127,101
October 22,502 1,647 1,867 43,166 7,379 49,005 2,434 128,000
November 23,552 1,756 1,948 42,425 7,513 48,714 2,311 128,220
December 26,714 2,278 1,846 47,638 7,938 51,751 2,560 140,725
2011
January 28,049 2,161 1,867 45,950 7,869 53,111 1,943 140,950
February 24,489 1,437 1,798 41,202 8,688 46,989 2,404 127,007
March 25,103 1,325 1,669 42,279 8,789 49,555 2,621 131,341
April 22,645 1,150 1,857 40,914 7,980 45,774 2,332 122,652
May 23,267 1,140 1,903 42,606 8,549 45,054 2,616 125,135
June 22,940 1,148 1,811 42,816 8,424 48,089 2,747 127,974
July 24,535 1,096 1,847 49,682 8,484 48,877 2,714 137,236
August 24,093 1,135 1,610 50,264 8,442 49,078 2,749 137,371
September 22,602 1,096 1,783 45,244 9,122 48,147 2,709 130,703
October 22,495 1,238 1,825 42,548 9,477 48,366 2,762 128,711
November 22,098 1,163 1,740 43,060 8,591 50,337 2,652 129,641
December 23,893 1,140 1,841 48,587 9,203 52,922 2,817 140,403
2012
January 25,211 2,281 2,292 47,409 9,732 49,808 2,107 138,839
February 22,416 961 2,017 43,785 9,416 47,023 2,035 127,654
March 21,458 1,057 2,012 44,005 9,956 48,544 1,937 128,970
April 18,141 850 1,507 44,946 10,053 44,838 1,866 122,201
May 20,238 923 1,627 45,801 9,832 47,116 2,073 127,611
June 19,799 878 1,881 47,072 9,567 46,476 2,182 127,855
July 21,190 913 2,175 52,025 9,516 48,617 2,028 136,463
August 21,162 908 2,386 50,360 9,883 48,931 2,145 135,775
September 19,447 782 2,072 45,635 8,567 48,066 1,957 126,527
October 20,317 999 2,205 44,727 8,350 49,311 2,034 127,943
November 21,049 920 2,165 43,801 8,466 49,926 2,039 128,366
December 22,177 979 2,079 47,379 9,809 51,858 2,168 136,450

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.