Table 4.11. Fuel-Switching Capacity of Operable Generators Reporting Natural Gas as the Primary Fuel, by Producer Type, 2011
(Megawatts, Percent)

  Fuel-Switchable Part of Total
Producer Type Total Net Summer Capacity of All Generators Reporting Natural Gas as the Primary Fuel
Net Summer Capacity of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids
Fuel Switchable Capacity as Percent of Total Maximum Achievable Net Summer Capacity Using Petroleum Liquids Fuel Switchable Net Summer Capacity Reported to Have No Factors that Limit the Ability to Switch to Petroleum Liquids
Electric Utilities 193,631 76,842 39.7 75,280 25,108
Independent Power Producers, Non-Combined Heat and Power Plants 176,517 41,890 23.7 40,935 11,468
Independent Power Producers, Combined Heat and Power Plants 29,373 6,891 23.5 6,614 1,239
Electric Power Sector Subtotal 399,520 125,623 31.4 122,829 37,814
Commercial Sector 1,283 676 52.7 648 131
Industrial Sector 14,389 1,260 8.8 1,212 253
All Sectors 415,191 127,559 30.7 124,689 38,199

Notes: Petroleum includes distillate fuel oil (all diesel and No. 1, No. 2, and No. 4 fuel oils), residual fuel oil (No. 5 and No. 6 fuel oils and bunker C fuel oil), jet fuel, kerosene, petroleum coke (converted to liquid petroleum, see Technical Notes for conversion methodology), waste oil, and beginning in 2011, synthetic gas and propane. Prior to 2011, synthetic gas and propane were included in Other Gases.
In 2011, EIA corrected the NAICS codes of several plants which resulted in a net capacity shift from the electric utility sector to the commercial sector.
Source: U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report.'