| AC | alternating current |
|---|
| AEO | Annual Energy Outlook (U.S. Energy Information Administration) |
|---|
| ARPA-E | Advanced Research Projects Agency-Energy |
|---|
| ATB | Annual Technology Baseline |
|---|
| BAR | Big Adaptive Rotor |
|---|
| BAU | business as usual |
|---|
| BESS | battery energy storage system(s) |
|---|
| BOS | balance of system |
|---|
| CAPEX | capital expenditure |
|---|
| CC | capital cost (CSP page) |
|---|
| CC | combined cycle |
|---|
| CF | capacity factor |
|---|
| CFDC | DC-rated capacity |
|---|
| cfs | cubic feet per second |
|---|
| CO2 | carbon dioxide |
|---|
| COD | commercial operation date |
|---|
| CCS | carbon capture and storage |
|---|
| CRF | capital recovery factor |
|---|
| CSP | concentrating solar power |
|---|
| CT | combustion turbine |
|---|
| DC | direct current |
|---|
| dGen | Distributed Generation Market Demand Model |
|---|
| DNI | direct normal irradiance |
|---|
| DOE | U.S. Department of Energy |
|---|
| DSCR | debt service coverage ratio |
|---|
| EERE | Energy Efficiency & Renewable Energy, Office of |
|---|
| EGS | enhanced geothermal system |
|---|
| EIA | U.S. Energy Information Administration |
|---|
| EMRF | expected market return on premium |
|---|
| E/P | energy to power ratio |
|---|
| EPC | engineering, procurement, and construction |
|---|
| FCR | fixed charge rate |
|---|
| FE | DOE Office of Fossil Energy and Carbon Management |
|---|
| FOM | fixed operation and maintenance |
|---|
| ft | feet |
|---|
| GCC | grid connection costs |
|---|
| GETEM | Geothermal Electricity Technology Evaluation Model |
|---|
| GHI | global horizontal irradiance |
|---|
| GIS | geographic information system |
|---|
| GW | gigawatt |
|---|
| GWe | gigawatt electrical |
|---|
| H | head |
|---|
| ha | hectare |
|---|
| HAP | Hydropower Advancement Project |
|---|
| hr | hour |
|---|
| HRSG | heat recovery steam generator |
|---|
| ICC | initial capital cost |
|---|
| ICCS | industrial carbon capture and storage |
|---|
| IEA | International Energy Agency |
|---|
| IGCC | integrated gasification combined cycle |
|---|
| ILR | inverter loading ratio |
|---|
| IPP | independent power producer |
|---|
| IRENA | International Renewable Energy Agency |
|---|
| IRP | integrated resource plan |
|---|
| ISO-NE | ISO New England |
|---|
| ITC | investment tax credit |
|---|
| JRC | Joint Research Centre, European Commission |
|---|
| km2 | square kilometers |
|---|
| kV | kilovolt |
|---|
| kW | kilowatt |
|---|
| kWAC | kilowatt, alternating current |
|---|
| kWDC | kilowatt, direct current |
|---|
| kWe | kilowatt electrical |
|---|
| KWh | kilowatt-hour |
|---|
| kWhAC | kilowatt-hour, alternating current |
|---|
| LBNL | Lawrence Berkeley National Laboratory |
|---|
| LCOE | levelized cost of energy |
|---|
| LDST | large-diameter steel tower |
|---|
| LIBOR | London Inter-bank Offered Rate |
|---|
| m | meter |
|---|
| MACRS | Modified Accelerated Cost Recovery System |
|---|
| MARKAL/TIMES | MARKet Allocation/The Integrated MARKAL-EFOM System |
|---|
| mi | mile |
|---|
| MW | megawatt |
|---|
| MWAC | megawatt, alternating current |
|---|
| MWDC | megawatt, direct current |
|---|
| MWe | megawatt electrical |
|---|
| MWh | megawatt-hour |
|---|
| NEMS | National Energy Modeling System |
|---|
| NF-EGS | near-hydrothermal field enhanced geothermal system |
|---|
| NGCC | natural gas combine cycle |
|---|
| NGCT | natural gas combustion turbine |
|---|
| NHAAP | National Hydropower Asset Assessment Program |
|---|
| NIPSCO | Northern Indiana Public Service Company |
|---|
| N/A | not applicable |
|---|
| nm | nautical miles |
|---|
| NPD | non-powered dam |
|---|
| NREL | National Renewable Energy Laboratory |
|---|
| NSD | new stream-reach development |
|---|
| NSRDB | National Solar Radiation Database |
|---|
| O&M | operation and maintenance |
|---|
| OCC | overnight capital cost |
|---|
| OEM | original equipment manufacturer |
|---|
| OGS | oil-gas-steam |
|---|
| OPEX | operating expense |
|---|
| ORBIT | Offshore Renewable Balance-of-system Installation Tool |
|---|
| ORCA | Offshore Regional Cost Analyzer |
|---|
| ORNL | Oak Ridge National Laboratory |
|---|
| ORTP | offer review trigger price |
|---|
| PC | pulverized coal |
|---|
| PERC | passivated emitter and rear contact |
|---|
| PGE | Portland General Electric |
|---|
| PPA | power purchase agreement |
|---|
| PSH | pumped-storage hydropower |
|---|
| PSM | Physical Solar Model |
|---|
| PTC | production tax credit |
|---|
| PV | photovoltaic |
|---|
| R&D | research and development |
|---|
| ReEDS | Regional Energy Deployment System |
|---|
| ROP | rate of penetration |
|---|
| RROE | rate of return on equity |
|---|
| RTE | round-trip efficiency |
|---|
| SAM | System Advisor Model |
|---|
| SMART | System Management of Atmospheric Resource through Technology |
|---|
| SO2 | sulfur dioxide |
|---|
| SolarAPP | Solar Automated Permit Processing |
|---|
| TES | thermal energy storage |
|---|
| TMY | typical meteorological year |
|---|
| TRG | techno-resource group |
|---|
| TVA | Tennessee Valley Authority |
|---|
| TWh | terawatt-hour |
|---|
| USACE | U.S. Army Corps of Engineers |
|---|
| USD | U.S. dollars |
|---|
| USGS | United States Geological Survey |
|---|
| VOM | variable operation and maintenance |
|---|
| W | watt |
|---|
| WAC | watts, alternating current |
|---|
| WACC | weighted average cost of capital |
|---|
| yr | year |
|---|