705 abbreviations
TVATennessee Valley Authority (US) (electricity)
TWterawatt (one trillion watts) (measurement)
TWHterawatt-hour (one trillion watt hours)
U3O8triuranium octaoxide (nuclear)
UAEUnited Arab Emirates (oil)
UCTEUnion for the Coordination of the Transport of Electricity, the power transmission system of continental Europe
UF6uranium hexaflouride (nuclear)
UFLSUnder frequency load shedding (electricity)
UHVACUltra High Voltage Alternating Current (electricity)
UHVDCUltra High Voltage Direct Current (electricity)
ULCCUltra Large Crude Carrier (oil)
UMTRAUranium Mill Tailings Radiation Control Act of 1978 (US)
UNCCDUnited Nations Convention to Combat Desertification
UNDESAUN Department of Economic and Social Affairs
UNECEUnited Nations Economic Commission for Europe
UO2uranium dioxide (nuclear)
UO3uranium trioxide (nuclear)
UO4uranyl peroxide (nuclear)
UOXuranium oxide (nuclear)
URRUltimate Recoverable Resources
USBRUnited States Bureau of Reclamation
U.S.C.United States Code
USCEUnited States Army Corps of Engineers
US DOEUnited States Department of Energy
U-valuethermal transmittance (also called U-factor)
UVLSUnder voltage load shedding (electricity)
VVolt (measurement)
VAVolt-ampere (measurement)
varVolt-ampere reactive (measurement)
VAWTvertical axis wind turbine (wind)
VINvehicle identification number (US) (transportation)
VLCCvery large crude carrier (oil)
VMTvehicle miles traveled (transportation)
VOCvolatile organic compound
VPPVariable peak pricing (electricity)
VSAVoltage stability analysis
WACOGweighted average cost of gas
WAMSWide area measurement system- see description in phasor measurement unit article. (electricity)
WCMCWorld Conservation Monitoring Centre
WCREWorld Commission on Renewable Energy
WEAWorld Energy Assessment
WECWorld Energy Council
WECCWestern Electricity Coordinating Council (US)
WEEAWorld Energy Efficiency Organization
WFwater factor (clothes washers)
WHwatthour (measurement)
WIRABWestern Interconnection Regional Advisory Body (US)
WRIWorld Resources Institute
WSCCWestern Systems Coordinating Council (US)
WSPPWestern Systems Power Pool (US)