Table 3.24. Useful Thermal Output by Energy Source: Electric Power Sector Combined Heat and Power, 2009 - 2019
(Billion Btus)

Period Coal Petroleum
Liquids
Petroleum
Coke
Natural
Gas
Other
Gas
Renewable
Sources
Other Total
Annual Totals
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
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
Year 2017
January 1,178 102 106 16,884 1,474 2,419 645 22,809
February 1,004 49 104 14,583 1,327 2,107 570 19,744
March 1,047 22 113 16,687 1,467 2,451 641 22,428
April 799 25 109 14,805 1,394 1,786 629 19,549
May 766 32 112 15,047 1,453 1,727 643 19,780
June 797 33 104 16,004 1,448 1,786 645 20,817
July 925 34 104 17,300 1,518 1,893 684 22,459
August 937 27 102 17,112 1,396 1,860 678 22,113
September 872 58 101 15,575 1,535 1,779 577 20,496
October 932 45 105 15,753 1,615 1,985 488 20,922
November 909 64 98 15,335 1,570 2,154 561 20,691
December 1,104 136 109 17,213 1,599 2,331 663 23,154
Year 2018
January 1,483 437 104 18,095 1,467 2,384 625 24,596
February 1,151 36 88 16,586 1,398 2,279 568 22,104
March 1,194 35 97 17,454 1,412 2,354 632 23,177
April 1,005 32 105 15,767 1,579 1,614 561 20,663
May 1,050 51 64 16,311 1,661 1,542 573 21,253
June 1,069 37 14 16,547 1,535 1,664 643 21,509
July 1,087 28 97 18,937 1,576 1,794 635 24,154
August 1,073 32 99 18,736 1,569 1,763 620 23,891
September 882 35 80 16,902 1,510 1,594 439 21,442
October 793 46 99 17,040 1,776 1,980 578 22,311
November 1,396 49 86 17,026 1,571 2,200 625 22,954
December 1,391 204 90 18,059 1,639 2,208 619 24,210
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

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.