| ACEEE |
American Council for an Energy-Efficient Economy |
| AEE |
Advanced Energy Economy |
| AEIC |
American Energy Innovation Council |
| AEO |
Annual Energy Outlook |
| AMI |
advanced metering infrastructure |
| APPA |
American Public Power Association |
| ARPA-E |
Advanced Research Projects Agency-Energy |
| ARRA |
American Recovery and Reinvestment Act of 2009 |
| ASCE |
American Society of Civil Engineers |
| ASHRAE |
American Society of Heating, Refrigerating and Air-Conditioning Engineers |
| BEETIT |
Building Energy Efficiency Through Innovative Thermodevices |
| BLS |
Bureau of Labor Statistics |
| BNEF |
Bloomberg New Energy Finance |
| Btu |
British thermal unit |
| CAFE |
Corporate Average Fuel Economy |
| CBO |
Congressional Budget Office |
| CCS |
carbon capture and storage |
| CCSP |
Climate Change Science Program |
| CEER |
Council of European Energy Regulators |
| CEIR |
Center for Integrative Environmental Research |
| CES-21 |
California Electric Systems for the 21st Century |
| CESP |
customer energy service provider |
| CHP |
combined heat and power |
| CO2 |
carbon dioxide |
| COP21 |
21st yearly session of the Conference of the Parties to the 1992 United Nations Framework Convention on Climate Change |
| C-PACE |
commercial property assessed clean energy |
| CPP |
Clean Power Plan |
| CSP |
concentrating solar power |
| DARPA |
Defense Advanced Research Projects Agency |
| DELTA |
Delivering Efficient Local Thermal Amenities |
| DG |
distributed generation |
| DHS |
Department of Homeland Security |
| DoD |
Department of Defense |
| DOE |
Department of Energy |
| DSM |
demand-side management |
| DSO |
distribution system operator |
| EAC |
electricity advisory committee |
| EDA |
Economic Development Agency |
| EEG |
Erneuerbare-Energien-Gesetz (German Renewable Energy Sources Act) |
| EEI |
Edison Electric Institute |
| EERE |
Office of Energy Efficiency and Renewable Energy |
| EERS |
energy-efficiency resource standard |
| EIA |
Energy Information Administration |
| ELCON |
Electric Consumers Resource Council |
| ELI |
Environmental Law Institute |
| EOR |
enhanced oil recovery |
| EPA |
Environmental Protection Agency |
| EPACT |
Energy Policy Act of 2005 |
| EPRI |
Electric Power Research Institute |
| ERCOT |
Electric Reliability Council of Texas |
| ESCO |
energy service company |
| ESPC |
energy savings performance contract |
| ETIS |
energy technology innovation system |
| FDA |
Food and Drug Administration |
| FEMP |
Federal Energy Management Program |
| FERC |
Federal Energy Regulatory Commission |
| FTC |
Federal Trade Commission |
| FY |
fiscal year |
| GAO |
Government Accountability Office |
| GB |
Great Britain |
| GDP |
gross domestic product |
| GENI |
Green Electricity Network Integration |
| GHG |
greenhouse gas |
| GPT |
general-purpose technology |
| GSA |
General Services Administration |
| GW |
gigawatt |
| GWh |
gigawatt hours |
| HECA |
Hydrogen Energy California Project |
| HUD |
Department of Housing and Urban Development |
| HVAC |
heating, ventilation, and air conditioning |
| HVDC |
high-voltage, direct current |
| IAEA |
International Atomic Energy Agency |
| ICC |
International Commerce Commission |
| ICS-CERT |
Industrial Control Systems Cyber Emergency Response Team |
| IDC |
intangible drilling cost |
| IDDRI |
Institute for Sustainable Development and International Relations |
| IEA |
International Energy Agency |
| IECC |
Interventional Energy Conservation Code® |
| IEEE |
Institute of Electrical and Electronics Engineers |
| IGCC |
integrated gasification (coal)-combined cycle |
| IOU |
investor-owned electric company |
| IPCC |
Intergovernmental Panel on Climate Change |
| IRC |
Internal Revenue Code |
| IRM |
Innovation Roll-out Mechanism |
| IRS |
Internal Revenue Service |
| ISO |
independent system operator |
| ITC |
investment tax credit |
| kWh |
kilowatt hour |
| LACE |
levelized avoided cost of electricity |
| LBD |
learning by doing |
| LBS |
learning by (re)searching |
| LBW |
learning by waiting |
| LCOE |
levelized cost of electricity |
| LED |
light-emitting diode |
| LEED |
Leadership in Energy and Environmental Design |
| LLNL |
Lawrence Livermore National Laboratory |
| LTC |
load tap changer |
| LWR |
light water reactor |
| MACRS |
Modified Accelerated Cost Recovery System |
| MEPS |
minimum efficiency performance standards |
| METI |
Ministry of Economy, Trade and Industry (Japan) |
| MHK |
marine hydrokinetic |
| MIT |
Massachusetts Institute of Technology |
| MLP |
master limited partnership |
| MMBtu |
1 million British thermal units |
| MMcf |
1 million cubic feet |
| Mtpa |
million tons per annum |
| MW |
megawatt |
| MWh |
megawatt hour |
| NAE |
National Academy of Engineering |
| NAECA |
National Appliance Energy Conservation Act |
| NAM |
National Academy of Medicine |
| NAREIT |
National Association of Real Estate Investment Trusts |
| NARUC |
National Association of Regulatory Utility Commissioners |
| NAS |
National Academy of Sciences |
| NASA |
National Aeronautics and Space Administration |
| NCRDS |
National Coal Resources Data System |
| NEI |
Nuclear Energy Institute |
| NEMS |
National Energy Modeling System |
| NERC |
North American Electric Reliability Corporation |
| NETL |
National Energy Technology Laboratory |
| NGO |
nongovernmental organization |
| NH3 |
ammonia |
| NIA |
Network Innovation Allowance |
| NIC |
Network Innovation Competition |
| NIST |
National Institute of Standards and Technology |
| NMSS |
Office of Nuclear Material Safety and Safeguards |
| NNATCET |
National Network for Advancing Translational Clean Energy Technologies |
| NNMI |
National Network for Manufacturing Innovation |
| NOx |
oxide of nitrogen |
| NRC |
National Research Council |
| NREL |
National Renewable Energy Laboratory |
| NSF |
National Science Foundation |
| O&M |
operations and maintenance |
| OECD |
Organisation for Economic Co-operation and Development |
| Ofgem |
Office of Gas and Electric Markets (United Kingdom) |
| PAA |
Price-Anderson Act |
| PACE |
property assessed clean energy |
| PCAST |
President’s Council of Advisors on Science and Technology |
| PLR |
private letter ruling |
| PM |
particulate matter |
| PNNL |
Pacific Northwest National Laboratory |
| PPA |
power purchase agreement |
| PSERC |
Power Systems Engineering Research Center |
| PTC |
production tax credit |
| PV |
photovoltaic |
| R&D |
research and development |
| RAP |
Regulatory Assistance Project |
| RD&D |
research, development, and demonstration |
| REC |
renewable energy credit |
| REIDI |
regional energy innovation and development institute |
| REIT |
real estate investment trust |
| REV |
“Reforming the Energy Vision” |
| RFF |
Resources for the Future |
| RFI |
request for information |
| RIDF |
Regional Innovation Demonstration Fund |
| RIIO |
Revenue set to deliver strong Incentives, Innovation and Outputs |
| RNM |
reference network model |
| RPS |
renewable portfolio standard |
| RTO |
regional transmission organization |
| SBA |
Small Business Administration |
| SBIC |
Small Business Investment Company (program) |
| SBIR |
Small Business Innovation Research |
| SDSN |
Sustainable Development Solutions Network |
| SEIA |
Solar Energy Industries Association |
| SF6 |
sulfur hexafluoride |
| SMR |
small modular reactor |
| SOx |
oxide of sulfur |
| SWITCHES |
Strategies for Wide-Bandgap, Inexpensive Transistors for Controlling High-Efficiency Systems |
| TCEP |
Texas Clean Energy Project |
| TRL |
technology readiness level |
| U.S. NRC |
U.S. Nuclear Regulatory Commission |
| UAE |
United Arab Emirates |
| UESC |
utility energy service contract |
| UN |
United Nations |
| UNFCCC |
United Nations Framework Convention on Climate Change |
| USGS |
United States Geological Survey |