| Table 8.2. Average Tested Heat Rates by Prime Mover and Energy Source, 2007 - 2015 |
| (Btu per Kilowatthour) |
| Prime Mover | Coal | Petroluem | Natural Gas | Nuclear |
|---|---|---|---|---|
| 2007 | ||||
| Steam Generator | 10,158 | 10,398 | 10,440 | 10,489 |
| Gas Turbine | -- | 13,217 | 11,632 | -- |
| Internal Combustion | -- | 10,447 | 10,175 | -- |
| Combined Cycle | W | 10,970 | 7,577 | -- |
| 2008 | ||||
| Steam Generator | 10,138 | 10,356 | 10,377 | 10,452 |
| Gas Turbine | -- | 13,311 | 11,576 | -- |
| Internal Combustion | -- | 10,427 | 9,975 | -- |
| Combined Cycle | W | 10,985 | 7,642 | -- |
| 2009 | ||||
| Steam Generator | 10,150 | 10,349 | 10,427 | 10,459 |
| Gas Turbine | -- | 13,326 | 11,560 | -- |
| Internal Combustion | -- | 10,428 | 9,958 | -- |
| Combined Cycle | W | 10,715 | 7,605 | -- |
| 2010 | ||||
| Steam Generator | 10,142 | 10,249 | 10,416 | 10,452 |
| Gas Turbine | -- | 13,386 | 11,590 | -- |
| Internal Combustion | -- | 10,429 | 9,917 | -- |
| Combined Cycle | W | 10,474 | 7,619 | -- |
| 2011 | ||||
| Steam Generator | 10,128 | 10,414 | 10,414 | 10,464 |
| Gas Turbine | -- | 13,637 | 11,569 | -- |
| Internal Combustion | -- | 10,428 | 9,923 | -- |
| Combined Cycle | W | 10,650 | 7,603 | -- |
| 2012 | ||||
| Steam Generator | 10,107 | 10,359 | 10,385 | 10,479 |
| Gas Turbine | -- | 13,622 | 11,499 | -- |
| Internal Combustion | -- | 10,416 | 9,991 | -- |
| Combined Cycle | W | 10,195 | 7,615 | -- |
| 2013 | ||||
| Steam Generator | 10,089 | 10,334 | 10,354 | 10,449 |
| Gas Turbine | -- | 13,555 | 11,371 | -- |
| Internal Combustion | -- | 10,401 | 9,573 | -- |
| Combined Cycle | W | 9,937 | 7,667 | -- |
| 2014 | ||||
| Steam Generator | 10,080 | 10,156 | 10,408 | 10,459 |
| Gas Turbine | -- | 13,457 | 11,378 | -- |
| Internal Combustion | -- | 10,403 | 9,375 | -- |
| Combined Cycle | W | 9,924 | 7,658 | -- |
| 2015 | ||||
| Steam Generator | 10,059 | 10,197 | 10,372 | 10,458 |
| Gas Turbine | -- | 13,550 | 11,302 | -- |
| Internal Combustion | -- | 10,379 | 9,322 | -- |
| Combined Cycle | W | 9,676 | 7,655 | -- |
| Notes: W = Withheld to avoid disclosure of individual company data. Heat rate is reported at full load conditions for electric utilities and independent power producers. The average heat rates above are weighted by Net Summer Capacity. Coal Combined Cycle represents integrated gasification units. Source: U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report.' |