| Table 4.13. Fuel-Switching Capacity of Operable Generators Reporting Natural Gas as the Primary Fuel, |
| by Type of Prime Mover, 2021 (Megawatts, Percent) |
| Prime Mover Type | Number of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids | Net Summer Capacity of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids |
Fuel Switchable Net Summer Capacity Reported to Have No Factors that Limit the Ability to Switch to Petroleum Liquids |
|---|---|---|---|
| Steam Generator | 171 | 25,370.4 | 8,770.1 |
| Combined Cycle | 370 | 47,260.4 | 5,360.3 |
| Internal Combustion | 273 | 1,118.9 | 329.6 |
| Gas Turbine | 866 | 57,918.7 | 12,105.1 |
| All Fuel Switchable Prime Movers | 1,680 | 131,668.4 | 26,565.1 |
| Notes: Petroleum liquids include 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, waste oil, and propane. Source: U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report.' |