Table 3.24. Useful Thermal Output by Energy Source: Electric Power Sector Combined Heat and Power, 2011 - 2021
(Billion Btus)

Period Coal Petroleum
Liquids		 Petroleum
Coke		 Natural
Gas		 Other
Gas		 Renewable
Sources		 Other Total
Annual Totals
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
2013 21,306 4,614 993 188,094 10,303 16,225 4,966 246,501
2014 15,513 4,931 936 182,148 7,732 17,736 5,666 234,662
2015 16,036 4,894 1,143 178,167 7,161 16,999 5,180 229,580
2016 13,922 695 1,237 227,427 17,400 24,993 8,046 293,719
2017 11,269 627 1,267 192,299 17,798 24,279 7,422 254,961
2018 13,573 1,023 1,023 207,459 18,692 23,375 7,119 272,265
2019 12,759 655 1,019 197,106 19,684 26,057 7,544 264,823
2020 7,412 530 1,300 203,104 17,318 24,815 7,322 261,801
2021 6,793 891 1,180 191,326 16,931 22,963 5,547 245,631
Year 2019
January 1,756 131 85 18,139 1,736 2,518 643 25,008
February 1,186 58 89 15,487 1,764 2,366 595 21,547
March 1,241 58 95 17,184 1,790 2,422 622 23,412
April 1,166 46 98 15,213 1,699 2,226 610 21,057
May 1,089 41 94 14,942 1,511 2,078 690 20,445
June 1,051 42 79 15,814 1,424 1,971 672 21,052
July 995 33 84 16,967 1,643 1,874 661 22,257
August 968 29 91 17,942 1,552 1,970 637 23,188
September 782 63 79 15,907 1,519 1,794 525 20,669
October 901 54 23 15,836 1,721 2,051 551 21,137
November 828 51 100 16,240 1,629 2,367 656 21,871
December 795 50 102 17,435 1,697 2,420 680 23,179
Year 2020
January 753 32 114 17,876 1,623 2,538 661 23,597
February 686 33 125 16,663 1,697 2,413 634 22,251
March 586 37 114 16,995 1,788 2,447 646 22,613
April 607 40 100 15,526 1,365 1,851 666 20,154
May 504 35 103 16,158 1,308 1,947 548 20,604
June 545 32 88 16,788 1,188 1,937 630 21,208
July 599 39 99 18,126 1,192 1,889 617 22,561
August 584 43 118 18,321 1,508 1,854 583 23,010
September 538 46 122 17,061 1,141 1,716 567 21,190
October 619 57 104 16,363 1,279 1,782 573 20,778
November 665 53 99 15,739 1,560 2,132 534 20,782
December 724 83 113 17,489 1,668 2,310 664 23,052
Year 2021
January 641 79 128 17,272 1,613 2,373 624 22,729
February 730 230 104 15,263 857 2,094 530 19,808
March 665 72 117 15,591 906 2,242 572 20,164
April 489 66 104 15,640 1,377 1,980 364 20,021
May 489 45 96 15,212 1,282 1,699 421 19,244
June 515 34 99 15,662 1,554 1,768 443 20,075
July 584 53 108 16,255 1,570 1,703 435 20,708
August 550 54 103 16,918 1,605 1,777 425 21,432
September 657 42 94 15,425 1,446 1,655 384 19,702
October 330 59 53 15,687 1,790 1,443 386 19,748
November 495 91 85 16,115 1,569 2,112 455 20,922
December 649 67 89 16,285 1,363 2,117 509 21,078

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.