| Table 9.3. Quantity and Net Summer Capacity of Operable Cooling Systems, by Energy Source and |
| Cooling System Type, 2007 - 2011 |
| |
Once-Through Cooling Systems | Recirculating Cooling Systems | Cooling Ponds | Dry Cooling Systems | Hybrid Wet and Dry Cooling Systems | Other Cooling System Types | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Energy Source | Quantity | Associated Net Summer Capacity (MW) | Quantity | Associated Net Summer Capacity (MW) | Quantity | Associated Net Summer Capacity (MW) | Quantity | Associated Net Summer Capacity (MW) | Quantity | Associated Net Summer Capacity (MW) | Quantity | Associated Net Summer Capacity (MW) |
| 2007 | ||||||||||||
| Coal | 455 | 124,778 | 339 | 148,792 | 98 | 46,401 | -- | -- | -- | -- | 12 | 5,764 |
| Natural Gas | 171 | 46,159 | 324 | 55,838 | 64 | 27,016 | -- | -- | -- | -- | 7 | 1,824 |
| Nuclear | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Petroleum | 78 | 20,996 | 22 | 5,784 | 3 | 2,513 | -- | -- | -- | -- | 1 | 1,006 |
| Other | 13 | 913 | 21 | 1,293 | -- | -- | -- | -- | -- | -- | 3 | 263 |
| 2008 | ||||||||||||
| Coal | 450 | 124,851 | 347 | 149,807 | 97 | 45,567 | -- | -- | -- | -- | 7 | 3,848 |
| Natural Gas | 169 | 45,516 | 339 | 58,717 | 57 | 24,670 | -- | -- | -- | -- | 8 | 2,113 |
| Nuclear | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Petroleum | 78 | 21,123 | 19 | 5,603 | 3 | 4,104 | -- | -- | -- | -- | 1 | 1,011 |
| Other | 13 | 913 | 18 | 1,059 | -- | -- | -- | -- | -- | -- | 3 | 263 |
| 2009 | ||||||||||||
| Coal | 445 | 123,341 | 357 | 153,687 | 97 | 45,862 | 1 | 335 | -- | -- | 5 | 2,518 |
| Natural Gas | 165 | 44,125 | 346 | 60,308 | 55 | 22,467 | 9 | 2,120 | 1 | 209 | 1 | 331 |
| Nuclear | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Petroleum | 75 | 20,660 | 17 | 5,564 | 3 | 4,104 | -- | -- | -- | -- | 1 | 1,011 |
| Other | 14 | 1,056 | 19 | 1,124 | -- | -- | 2 | 128 | -- | -- | -- | -- |
| 2010 | ||||||||||||
| Coal | 399 | 115,536 | 351 | 149,047 | 84 | 41,393 | 2 | 435 | 1 | 766 | 5 | 1,364 |
| Natural Gas | 152 | 46,468 | 386 | 68,308 | 52 | 21,272 | 33 | 6,902 | 1 | 270 | 3 | 2,411 |
| Nuclear | 38 | 38,380 | 34 | 36,540 | 10 | 11,043 | -- | -- | -- | -- | 7 | 7,901 |
| Petroleum | 71 | 18,693 | 17 | 5,513 | 3 | 4,064 | -- | -- | -- | -- | 2 | 1,011 |
| Other | 16 | 928 | 26 | 1,998 | 2 | 172 | 4 | 228 | -- | -- | 1 | 30 |
| 2011 | ||||||||||||
| Coal | 413 | 120,074 | 359 | 157,262 | 103 | 48,986 | 3 | 840 | 1 | 766 | 6 | 2,572 |
| Natural Gas | 172 | 50,357 | 412 | 75,568 | 58 | 21,684 | 48 | 10,095 | 3 | 542 | 2 | 870 |
| Nuclear | 48 | 48,942 | 36 | 39,485 | 12 | 12,792 | -- | -- | -- | -- | 8 | 8,890 |
| Petroleum | 65 | 16,003 | 17 | 5,443 | 4 | 4,692 | -- | -- | -- | -- | 2 | 1,011 |
| Other | 18 | 1,112 | 20 | 1,254 | -- | -- | 1 | 26 | -- | -- | 1 | 30 |
| Notes: 'Associated Net Summer Capacity' is defined as the net summer capacity of the generators that are associated with the operation of this environmental equipment. Coal includes anthracite, bituminous, subbituminous, lignite, and waste coal; coal synfuel and refined coal; and beginning in 2011, coal-derived synthesis gas. Prior to 2011 coal-derived synthesis gas was included in Other Gases. 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 Gases. Petroleum Coke includes petroleum coke-derived synthesis gas. Prior to 2011, petroleum coke-derived synthesis gas was included in Other Gases. EIA did not collect cooling system data for nuclear units or before 2010. In addition, EIA did not collect separate data for dry cooling systems or hybrid systems before 2010. Any dry systems that existed prior to 2010 were included in Other Cooling System Types. Other Energy Sources consists of wood and wood waste products, biomass, blast furnace gas and other gases. In cases where a cooling system supports multiple generators fueled by different energy sources, the cooling system and related capacity are included with all applicable energy sources. Source: U.S. Energy Information Administration, Form EIA-860, "Annual Electric Generator Report." |