Table 3.26. Useful Thermal Output by Energy Source: Industrial Sector Combined Heat and Power, 2015 - 2025
(Billion Btus)

Period Coal Petroleum
Liquids		 Petroleum
Coke		 Natural
Gas		 Other
Fossil
Gas		 Renewable
Sources		 Other Total
Annual Totals
2015 180,501 5,965 20,203 384,369 91,749 598,890 8,899 1,290,576
2016 173,589 6,792 18,692 478,068 131,481 655,831 11,904 1,476,358
2017 151,780 6,289 15,721 503,614 133,781 631,768 11,112 1,454,066
2018 142,671 7,535 15,281 521,936 153,985 622,699 11,118 1,475,224
2019 127,411 5,787 13,012 523,919 122,544 607,138 11,535 1,411,347
2020 114,031 5,078 10,863 548,938 117,730 568,537 10,702 1,375,879
2021 120,335 5,658 10,933 547,717 118,578 578,150 11,208 1,392,579
2022 116,212 13,837 10,375 537,793 115,764 555,335 9,245 1,358,561
2023 100,884 10,076 8,645 545,036 125,448 511,656 9,521 1,311,266
2024 97,987 4,589 9,094 554,896 129,154 505,459 9,238 1,310,416
2025 95,545 4,385 9,154 550,774 122,065 484,604 8,131 1,274,659
Year 2023
January 9,826 1,296 559 48,140 10,576 47,447 816 118,660
February 8,491 1,334 345 42,775 9,666 41,382 742 104,735
March 8,685 1,041 905 46,609 10,728 45,062 756 113,786
April 7,998 1,260 802 42,614 10,191 39,561 609 103,034
May 8,452 500 868 44,063 10,358 42,904 585 107,730
June 7,826 478 740 44,839 10,425 39,045 752 104,105
July 8,597 534 709 46,224 10,778 41,615 726 109,184
August 7,843 691 771 45,820 10,589 42,588 712 109,013
September 7,959 655 760 45,007 11,002 41,743 646 107,772
October 7,928 581 757 43,791 11,142 41,115 765 106,078
November 8,436 821 721 45,921 9,634 44,267 1,189 110,989
December 8,845 886 708 49,233 10,359 44,926 1,223 116,179
Year 2024
January 9,548 654 874 52,132 11,340 43,634 797 118,979
February 8,025 394 698 44,847 10,741 41,537 739 106,983
March 9,058 360 676 45,816 10,924 43,193 778 110,804
April 7,395 398 707 43,312 10,363 42,335 1,031 105,541
May 7,549 299 771 44,624 11,524 41,384 497 106,649
June 7,446 285 754 44,418 10,821 40,325 659 104,709
July 8,284 318 847 46,753 11,338 41,162 1,224 109,926
August 7,819 281 774 47,087 11,310 41,808 811 109,891
September 7,705 308 737 44,588 10,184 42,102 557 106,181
October 7,943 412 770 44,427 10,102 39,689 616 103,959
November 8,433 365 702 46,684 9,840 43,082 730 109,836
December 8,783 513 784 50,207 10,666 45,208 800 116,960
Year 2025
January 9,283 652 691 52,077 10,528 42,959 686 116,876
February 8,133 406 655 45,301 9,770 39,603 608 104,477
March 8,658 364 735 47,146 10,380 42,490 653 110,427
April 7,964 365 671 42,937 9,869 38,683 606 101,095
May 6,919 293 783 44,590 10,115 38,759 597 102,056
June 7,486 349 884 43,444 10,015 39,605 745 102,528
July 8,074 352 844 46,493 10,560 41,841 763 108,928
August 7,854 372 717 47,568 10,061 41,294 697 108,562
September 7,589 226 804 44,483 9,913 39,111 706 102,831
October 7,465 328 789 44,207 10,083 40,764 725 104,362
November 7,790 228 748 44,489 10,278 38,929 649 103,111
December 8,329 452 833 48,039 10,492 40,566 695 109,407

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 Fossil Gas.
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 Fossil Gas.
Petroleum Coke includes petroleum coke-derived synthesis gas. Prior to 2011, petroleum coke-derived synthesis gas was included in Other Fossil Gas.
Other Fossil Gas includes gaseous propane, blast furnace gas, other manufactured and waste gases derived from fossil fuels other than hydrogen. Prior to 2011, Other Fossil 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 hydrogen, non-biogenic municipal solid waste, batteries, 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.