The invention discloses a blade deicing and anti-icing system design. According to the deicing system, heating is started and stopped automatically, and hot air is delivered automatically. The system aim to realize a compact design, minimum material requirement, minimum production cost, automatic starting and stopping of a heating system, conduit-free delivery of hot air, and zero heat loss.

Blade deicing and anti-icing system design

The invention relates to the field of wind power technology, in particular to an anti-icing and de-icing device for a wind turbine blade. By means of the bionic principle, water drop adhesive force is reduced by means of a microporous hydrophobic membrane, water drops on the surface of the membrane are blown off by airflow, surface dryness of the blade is kept, and surface icing of the blade is prevented; ice accretion on the surface of the blade is broken and eliminated through expansion of the membrane after inflation. The device specifically comprises an air heater (blower), an air pipe, an inner membrane, an outer membrane, a membrane clamp base and the like, wherein the air heater (blower) is installed on an I beam of the blade and driven by a wind turbine generator, (hot) air is fed into the air pipe through the air heater (blower) and enters a gap between the inner membrane and the outer membrane through a quick plug connector, and the outer membrane is a breathable microporous hydrophobic membrane; the inner membrane and the outer membrane are sealed all round and fixed quickly by the membrane clamp base. The device has anti-icing and de-icing functions and is low in energy consumption. The device has important significance for safe, economical and efficient operation of wind turbine generators in cold and moist areas in winter.

Wind turbine blade with anti-icing and de-icing device

A rotor blade uses hot-air, for example exhaust from a generator positioned inside a nacelle of a wind turbine, for de-icing and/or anti-icing The rotor blade has an airfoil section and a cavity enclosed therein A flow path inside the cavity, for flow of the hot-air, extends from a root section towards a tip section Exhaust holes, fluidly connected with the flow path, at an outer surface of the airfoil section emit the hot-air from the airfoil section The rotor blade includes a cover plate positioned at the outer surface of the airfoil section and masking the exhaust holes, thereby creating an external flow space between the exhaust holes and the cover plate's inner surface The cover plate guides the hot-air over the outer surface of the airfoil section after the hot-air exits, via the exhaust holes, the airfoil section and before the hot-air escapes the rotor blade

Wind turbine blade having a cover plate masking hot-air exhaust for de-icing and/or anti-icing

The invention provides a wind turbine blade deicing method and device, a blade and a wind turbine, and relates to the technical field of wind power generation. The method comprises the steps of detecting the icing degrees of at least two positions of the blade leading edge, and judging the icing level of the blade leading edge according to the icing degree; selecting a first heating level, a second heating level or a third heating level according to the icing level of the blade leading edge for heating, wherein the at least two positions comprise a blade tip leading edge and a blade root leading edge; a heating area of the first heating level is the front end heating area of the blade leading edge, and heating areas of the second heating level are the two side heating areas of the blade leading edge; and the heating power density of the front end heating area of the blade leading edge is higher than the heating power density of the two side heating areas of the blade leading edge. According to the wind turbine blade deicing method, the icing degrees of different areas of the blade leading edge can be detected in real time accurately, and ice can be thawed quickly and effectively while the heating power is reduced; and the deicing cost can be reduced, and the generated energy is improved.

Wind turbine blade deicing method and device, blade and wind turbine

The invention discloses a wind turbine blade heating ice melting device based on a graphene heating film. The wind turbine blade heating ice melting device structurally comprises an automatic heatingice melting device, a connecting rotation disc, blades, a machine body, a power supply indicator light, a supporting column, a base and a tail vane; the blades are sequentially arranged on the side face of the connecting rotation disc at equal interval angle; the right end of the machine body is perpendicularly connected with the interior of the connecting rotation disc; the automatic heating icemelting device is installed in the blades and the connecting rotation disc; the top of the supporting column is fixedly connected with the bottom of the machine body, and the bottom of the supportingcolumn is perpendicularly connected with the top of the base; the power supply indicator light is arranged on the front side of the machine body; and the right end of the tail vane is fixedly connected with the left end of the machine body. When the device is used, the outside temperature can be detected; when the temperature is too low, the device can automatically work to produce heat, the condition that the wind turbine blades are iced is prevented, and the using convenience is improved; and when the surfaces of the wind turbine blades are iced, the device can produce heat to quickly melt ice through the graphene heating film, and the practical value is improved.

Wind turbine blade heating ice melting device based on graphene heating film

The invention discloses a wind turbine blade with an anti-ice/ice-removing function. An inner cavity of the wind turbine blade is provided with a heating area; and a plurality of air holes are arranged in the wind turbine blade. The wind turbine blade is mainly characterized in that the surface of the blade is heated by operating an air-film heating method and utilizing hot air which is generated by the heating area of the inner cavity of the blade and flows through the air holes on the surface of the blade. The wind turbine blade has the advantages of uniform heating on the surface of the blade, high heating speed, good anti-ice/ice-removing effect and less damage to the service life of the blade, and can be widely applied in the wind-power field.

Haitao Dai

Papers

Wind turbine blade with anti-ice/ice-removing function