Table 4.11. Fuel-Switching Capacity of Operable Generators Reporting Natural Gas as the Primary Fuel, by Producer Type, 2012
(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 206,774 78,346 37.9 74,835 23,624
Independent Power Producers, Non-Combined Heat and Power Plants 170,654 42,509 24.9 40,788 12,216
Independent Power Producers, Combined Heat and Power Plants 29,129 6,716 23.1 6,455 1,238
Electric Power Sector Subtotal 406,557 127,570 31.4 122,078 37,078
Commercial Sector 1,545 762 49.3 732 154
Industrial Sector 14,263 1,272 8.9 1,233 278
All Sectors 422,364 129,604 30.7 124,043 37,510

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.'