Turbogenerators
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
Unknown
Utilisation of wave motion
Valve and related methods for reducing fluid pressure and...
Vane adjusting mechanism for variable pitch mixed flow pumps...
Vane angle adjustment method of controlling operation of...
Variable speed pumping-up electrical power system
Variable undershot waterwheel
Velociter
Venturi pinwheel and sea anchor wave energy conversion systems
Vertical axis water turbine
Vertical axis wind and water turbine (kolotoc)
Vertical axis wind turbines