NOVELTY - Methane tank comprises blades (1), a wind power generator (2), a wind power support pillar (3), conducting wires (4), a parabolic mirror surface (5), a heat exchange device, a turbine generator, a support rod for the heat exchange device, a water supply pipe, a support frame for the parabolic mirror surface, a converging machine, a diverter, a methane tank, a warming device, an electromotor and a stirrer. The wind power generator is installed on the wind power support pillar and the blades are arranged at the front end of the wind power generator.    USE - The methane tank is useful for improving methane generation rate by complementary solar photo-thermal power and wind power generation.    DETAILED DESCRIPTION - Methane tank comprises blades (1), a wind power generator (2), a wind power support pillar (3), conducting wires (4), a parabolic mirror surface (5), a heat exchange device, a turbine generator, a support rod for the heat exchange device, a water supply pipe, a support frame for the parabolic mirror surface, a converging machine, a diverter, a methane tank, a warming device, an electromotor and a stirrer. The wind power generator is installed on the wind power support pillar and the blades are arranged at the front end of the wind power generator. The parabolic mirror surface is arranged above the support frame of the parabolic mirror surface, the heat exchange device and the turbine generator are installed above the support rod for the heat exchange device, and the water supply pipe is connected below the heat exchange device and is mutually communicated with the heat exchange device. The converging machine, the diverter and the electromotor are arranged above the methane tank, where a warming device and the stirrer are installed inside the methane tank. The wind power generator is connected with the converging machine via the conducting wire. The turbine generator is connected with the converging machine by the conducting wire, and the converging machine is connected with the diverter via the conducting wire. The diverter is connected with the warming device via the conducting wire and is further connected with the electromotor via the conducting wire, where the stirrer is connected below the electromotor.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the methane tank.    Blades (1)    Wind power generator (2)    Wind power support pillar (3)    Conducting wires (4)    Parabolic mirror surface (5)