BT = Turbines used in a binary cycle (such as used for geothermal applications)
CA = Combined cycle steam part
CC = Combined cycle total unit (used only for plants/generators that are in planning stage, for which
specific generator details cannot be provided)
CE = Compressed air energy storage
CS = Combined cycle single shaft (combustion turbine and steam turbine share a single generator)
CT = Combined cycle combustion turbine part (type of coal or solid must be reported as energy source
for integrated coal gasification)
FC = Fuel cell
GT = Combustion (gas) turbine – simple cycle (includes jet engine design)
HY = Hydraulic turbine (includes turbines associated with delivery of water by pipeline)
IC = Internal combustion engine (diesel, piston, reciprocating)
OT = Other
PS = Hydraulic turbine – reversible (pumped storage)
PV = Photovoltaic
ST = Steam turbine, including nuclear, geothermal, and solar steam (does not include combined cycle)
WT = Wind turbine
Energy Source: The first word or abbreviation is the primary energy source. The second word or
abbreviation is the alternate energy source.
AB = Agricultural crop byproducts/straw/energy crops
BFG = Blast furnace gas
Bit = Anthracite coal and bituminous coal
BLQ = Black liquor
DFO = Distillate fuel oil including diesel, No. 1, No. 2, and No. 4 fuel oils
GEO = Geothermal
JF = Jet fuel
KER = Kerosene
LFG = Landfill gas
Lig = Lignite coal
MSW = Municipal solid waste
N = Natural Gas
Nuc = Nuclear including Uranium, Plutonium, Thorium
OBG = Other biomass gas including digestor gas, methane, other biomass gases
OBL = Other biomass liquids (ethanol, fish oil, liquid acetonitrile waste, medical waste, tall oil, waste
alcohol, and other biomass not specified)
OBS = Other biomass solids (animal manure and waste, solid byproducts, and other solid biomass not specified)
OG = Other gas (butane, coal processes, coke–oven, refinery, and other processes)
OTH = Other (batteries, chemicals, coke breeze, hydrogen, pitch, sulfur, tar coal, and miscellaneous technologies)
PC = Petroleum coke
PG = Gaseous propane
PUR = Purchased steam
RFO = Residual fuel oil (including No. 5 and No. 6 fuel oils and Bunker C fuel oil)
S = Subbituminous coal
SC = Coal synfuel. Coal–based solid fuel that has been processed by a coal synfuel plant;
and coal–based fuels such as briquettes, pellets, or extrusions, which are formed from fresh
or recycled coal and binding materials.
SG = Synthetic gas, other than coal–derived.
SGC = Synthetic gas derived from coal.
SLW = Sludge waste
SUN = Solar (photovoltaic, thermal)
TDF = Tire–derived fuels
Water = Water at a conventional hydroelectric turbine.
WC = Waste/other coal including anthracite culm, bituminous gob, fine coal, lignite waste, and waste coal.
WDL = Wood waste liquids excluding black liquor, including red liquor, sludge wood, spent sulfite liquor,
and other wood–based liquids)
WDS = Wood/wood waste solids including paper pellets, railroad ties, utility poles, wood chips, bark,
and wood waste solids.
WH = Waste heat not directly attributed to an energy source. WH should only be reported where the
energy source for the waste heat is undetermined.
Wind = Wind
WO = Waste/other oil including crude oil, liquid butane, liquid propane, oil waste, re–refined
motor oil, sludge oil, tar oil, or other petroleum–based liquid wastes.
OA = Out of service – was not used for some or all of the reporting period but was either
returned to service on December 31 or will be returned to service in the next calendar year.
OP = Operating – in service (commercial operation) and producing some electricity. Includes peaking
units that are run on an as–needed intermittent or seasonal) basis.
OS = Out of service – was not used for some or all of the reporting period and is NOT expected
to be returned to service in the next calendar year.
SB = Standby/Backup – available for service but not normally used (has little or no
generation during the year) for this reporting period.
Number of Wind Turbines:
A dash (—) indicates not applicable.
IPP = Independent Power Producer.
IPP CHP = Independent Power Producer Combined Heat and Power.