Ultralight airfoils for wind energy conversion
Under water prop for electricity hydro
Underwater ducted turbine
Underwater ducted turbine
Underwater power generator
Underwater power plant and method for the installation thereof
Underwater powerplant having disconnectable nacelle
Underwater structures
Universal propulsion system
Unknown
Unknown
Unknown
Unknown
Upper head assembly
Utilisation of wave motion
Utilisation of wind energy
Utility scale osmotic grid storage
Utilization of solar energy