It is a Pelton Wheel.A pelton wheel is a very usual hydraulic turbine, it is used for up height than 10 m, and less than1800 m with a flow about 0,01 at 100 m^3/s.A pelton whell can produce up than 5kw at less1000 000 kw. That shovel model has less than 92 kg and can be used in a small hydroelectric central producing fence than 10000 kW.