Table 3.23. Useful Thermal Output by Energy Source: Total Combined Heat and Power (All Sectors), 2011 - 2021
(Billion Btus)

Period Coal Petroleum
Liquids
Petroleum
Coke
Natural
Gas
Other
Gas
Renewable
Sources
Other Total
Annual Totals
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
2013 243,043 12,828 25,224 553,696 103,719 611,443 22,171 1,572,124
2014 232,509 11,990 23,457 545,624 104,868 624,086 21,390 1,563,923
2015 211,030 11,796 21,748 591,749 98,910 626,887 19,729 1,581,849
2016 220,162 8,607 20,122 785,413 148,881 698,858 25,342 1,907,384
2017 193,164 7,922 17,322 789,485 151,579 674,248 23,685 1,857,405
2018 182,373 9,878 16,581 813,127 172,677 663,644 23,169 1,881,448
2019 162,108 7,992 14,278 802,153 142,229 643,548 22,429 1,794,736
2020 139,423 6,463 12,359 835,666 135,048 602,034 20,901 1,751,893
2021 149,948 7,603 12,390 818,853 135,509 609,495 19,596 1,753,394
Year 2019
January 17,187 1,511 1,276 72,612 12,164 58,244 2,116 165,110
February 15,124 734 1,182 64,964 11,146 52,831 1,957 147,938
March 14,793 609 1,273 68,303 12,304 55,403 1,998 154,682
April 13,488 529 1,257 61,359 12,016 51,489 1,759 141,898
May 12,639 864 1,243 63,354 11,527 52,084 1,647 143,357
June 12,452 409 1,224 64,013 11,309 51,440 1,833 142,681
July 12,106 376 1,204 68,751 12,492 53,785 1,830 150,545
August 12,265 450 1,146 69,982 12,002 54,256 1,915 152,017
September 11,754 468 1,284 65,274 11,652 50,594 1,683 142,709
October 12,909 507 1,055 65,018 11,765 53,397 1,765 146,417
November 13,417 957 950 67,055 11,641 54,062 1,991 150,074
December 13,973 576 1,183 71,467 12,211 55,962 1,936 157,309
Year 2020
January 14,223 537 1,205 79,227 12,634 55,761 1,802 165,390
February 12,903 666 782 72,512 12,266 52,121 1,812 153,063
March 11,772 453 624 73,085 12,642 53,110 1,753 153,439
April 10,321 936 477 68,293 10,215 49,909 1,806 141,958
May 10,169 371 994 64,264 10,791 50,049 1,615 138,252
June 10,054 430 1,160 65,419 10,655 46,834 1,648 136,200
July 11,352 432 1,206 71,798 11,071 48,571 1,694 146,123
August 11,028 462 1,241 70,526 11,354 47,815 1,721 144,146
September 10,676 442 1,169 65,054 9,828 46,229 1,720 135,119
October 12,138 509 1,142 66,947 11,186 49,237 1,719 142,878
November 11,473 550 1,096 65,000 10,947 49,683 1,689 140,440
December 13,313 676 1,262 73,540 11,460 52,714 1,919 154,885
Year 2021
January 13,508 901 1,195 75,026 12,146 52,978 1,876 157,631
February 13,008 1,211 1,127 63,858 9,824 46,856 1,639 137,523
March 12,848 661 1,160 66,602 11,328 51,663 1,807 146,070
April 11,665 536 1,054 64,929 10,872 50,772 1,478 141,307
May 11,625 474 1,172 64,871 11,001 51,349 1,433 141,924
June 11,957 431 940 68,154 11,219 48,992 1,597 143,289
July 12,845 474 1,001 71,676 11,510 51,742 1,659 150,906
August 12,307 531 920 71,372 11,790 51,703 1,591 150,214
September 12,528 513 990 65,464 11,246 49,478 1,565 141,784
October 11,819 633 931 66,499 11,244 48,954 1,575 141,655
November 12,965 606 935 68,710 11,670 50,301 1,586 146,773
December 12,874 633 965 71,693 11,658 54,707 1,788 154,318

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, as well as 2008-2015. Beginning with the 2016 Form EIA-923 data, the methodology for seperating the fuel used for electricity generation and useful thermal output from CHP plants was updated. This update will apply to the 2016 data and future data years. 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.