Table 4.6. Capacity Additions, Retirements and Changes by Energy Source, 2012 (Count, Megawatts)


Generator Additions Generator Retirements
Energy Source Number of Generators
Generator Nameplate Capacity
Net Summer Capacity Net Winter Capacity Number of Generators Generator Nameplate Capacity Net Summer Capacity Net Winter Capacity
Coal 5 3,953 3,663 3,677 86 11,273 10,308 10,420
Petroleum 40 580 508 365 96 2,417 2,121 2,168
Natural Gas 111 10,128 9,210 9,721 80 3,001 2,267 2,431
Other Gases 1 * * * 4 120 152 152
Nuclear -- -- -- -- -- -- -- --
Hydroelectric Conventional 15 345 344 342 28 317 315 314
Wind 149 12,953 12,885 12,885 1 13 12 12
Solar Thermal and Photovoltaic 210 1,616 1,595 1,585 -- -- -- --
Wood and Wood-Derived Fuels 5 186 162 155 3 36 32 33
Geothermal 12 192 146 172 1 1 1 1
Other Biomass 103 202 188 189 25 49 43 43
Hydroelectric Pumped Storage 2 42 42 42 -- -- -- --
Other Energy Sources 6 62 59 59 -- -- -- --
Total 659 30,257 28,801 29,192 324 17,226 15,251 15,575

 


Other Changes to Existing Capacity
Energy Source  
Generator Nameplate Capacity
Net Summer Capacity Net Winter Capacity
Coal   -96 -1,315 -1,149
Petroleum   -2,215 -2,701 -2,427
Natural Gas   1,443 230 -532
Other Gases   170 163 167
Nuclear   936 466 675
Hydroelectric Conventional   19 57 81
Wind   707 526 521
Solar Thermal and Photovoltaic   35 52 58
Wood and Wood-Derived Fuels   356 302 298
Geothermal   34 38 15
Other Biomass   181 130 138
Hydroelectric Pumped Storage   -- 34 -39
Other Energy Sources   246 251 257
Total   1,816 -1,768 -1,938

 

Notes: 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 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.
Other Gases also includes blast furnace gas and other manufactured and waste gases derived from fossil fuels. Prior to 2011, waste heat was included in Natural Gas.
Hydroelectric Conventional capacity includes conventional hydroelectric power excluding pumped storage facilities.
Wood and wood-derived fuels include wood/wood waste solids (including paper pellets, railroad ties, utility poles, wood chips, bark, and wood waste solids), wood waste liquids (red liquor, sludge wood, spent sulfite liquor, and other wood-based liquids), and black liquor.
Other Biomass include municipal solid waste, landfill gas, sludge waste, agricultural byproducts, other biomass solids, other biomass liquids, and other biomass gases (including digester gases, methane, and other biomass gases).
Other Energy Sources include batteries, hydrogen, purchased steam, sulfur, tire-derived fuels and other miscellaneous energy sources.
Capacity by energy source is based on the capacity associated with the energy source reported as the most predominant (primary) one, where more than one energy source is associated with a generator.
In the case of some wind, solar and wave energy sites, the capacity for multiple generators is reported in a single generator record and is presented as a single generator in the generator count.
Other Changes to Existing Capacity reflect uprates, derates, repowerings, and changes to previously reported generator capacity.

Source: U.S. Energy Information Administration, Form EIA-860, 'Annual Electric Generator Report.'