IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0108546
(2005-04-17)
|
등록번호 |
US-7637715
(2010-01-07)
|
우선권정보 |
IT-TO2002A0908(2002-10-17); WO-PCT/IB03/04551(2003-10-16) |
발명자
/ 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
24 인용 특허 :
10 |
초록
▼
A de-icing and anti-icing arrangement for a Wind Energy Converting System (WECS), a WECS comprising a de-icing and anti-icing arrangement and a method for preventing and eliminating ice accretion on the rotor blades of a WECS are provided. The WECS comprises a tower, a rotor having a plurality of bl
A de-icing and anti-icing arrangement for a Wind Energy Converting System (WECS), a WECS comprising a de-icing and anti-icing arrangement and a method for preventing and eliminating ice accretion on the rotor blades of a WECS are provided. The WECS comprises a tower, a rotor having a plurality of blades that rotate due to wind force, a nacelle including a first means for transforming the rotor's rotational movement to electric power, and a second means for permitting the flow of fluid from volumes defined by the rotor blades, the rotor blades comprising an external surface having openings in fluid connection with the volumes inside the blades for permitting the flow of fluid to the outside of the blades to fluid-thermodynamically interact with the wind hitting the part of the blade surface, and thereby prevent or eliminate the accretion of ice on the external surface of the blade.
대표청구항
▼
What is claimed is: 1. A method for preventing and eliminating the ice accretion on the rotor blades of a wind energy converting system, the method comprising: taking external air into an elevated nacelle; passing said air through volumes defined within one or more blades, that are rotatably connec
What is claimed is: 1. A method for preventing and eliminating the ice accretion on the rotor blades of a wind energy converting system, the method comprising: taking external air into an elevated nacelle; passing said air through volumes defined within one or more blades, that are rotatably connected to the nacelle and rotating because of the wind hitting said blades; and ejecting at least part of said air through holes on the outer surfaces of said blades, wherein said holes are meant to generate an air layer upon said outer surfaces of said blades concerned with said holes, said air layer having an enthalpy content greater than said wind hitting at least one of said surfaces of said blades and interacting thermo-fluid-dynamically with said hitting wind and/or with any kind of substance possibly present on said external surfaces of said blades. 2. The method of claim 1, wherein a thermal exchange between said air and heated surfaces is provided before ejecting at least part of said air through holes on said outer surfaces of said blades. 3. The method of claim 1, wherein said substance possibly present on said external surfaces of said blades is water or ice. 4. A wind energy converting system, comprising: an elevated nacelle adapted to take in external air; one or more blades that are rotatably connected with the nacelle and rotating because of the wind hitting said blades, said blades having inside volumes for the flow of said air; and said blades comprising on at least part of an external surface holes through which said air passes on corresponding outer surfaces of the blade, wherein said holes are adapted to generate upon said outer surfaces of said blades concerned with said holes an air layer having an enthalpy content greater than said wind hitting at least one of said surfaces of said blades, this air layer interacting thermo-fluid-dynamically with said hitting wind and/or with any kind of substance possibly present on said external surfaces of said blades. 5. The system of claim 4, wherein said volumes for the flow of air inside said blades are divided into a plurality of volumes, comprising at least a first and a second volume. 6. The system of claim 5, wherein said first volume for the flow of said air connects to a first series of holes, located substantially in the vicinity of the leading edge of said one or more blades. 7. The system of claim 6, wherein said second volume for the flow of said connects to a second series of holes, located substantially in the vicinity of the trailing edge of said one or more blades. 8. The system of claim 6, wherein said holes are located preferably on the tip part of said one or more blades. 9. The system of claim 4, wherein at least part of said air is heated, before being ejected through said holes on said blades, by thermal exchange with heated surfaces. 10. The system of claim 9, wherein said heated surfaces are provided by the electric means for transforming the rotating motion of said rotor in order to generate electrical power. 11. The system of claim 9, wherein said heated surfaces are provided by a dissipating device of the power, taken from another power source external to said wind energy converting system, adapted to increase the enthalpy content of said air. 12. The system of claim 9, wherein said heated surfaces are provided by the further use of a transformer and/or of other auxiliary electric devices. 13. The system of claim 9, wherein said heated surfaces are located within said nacelle. 14. The system of claim 13, further comprising an accumulation volume for said air inside said nacelle, for facilitating the thermal exchange between said air and said heated surfaces. 15. The system of claim 14, wherein said accumulation volume is, in its external envelope, substantially made of a material with poor thermal conductivity. 16. The system of claim 14, wherein said accumulation volume is at least in part internally coated with thermal conductive material in connection with said heated surfaces, so as to constitute a thermal bridge for facilitating said thermal exchange. 17. The system of claim 14, wherein said accumulation volume is connected to one or more openings located in the rear part of said nacelle. 18. The system of claim 14, comprising one or more of a fan or of a compressor, wherein said one or more of a fan or a compressor circulate said air inside said accumulation volume. 19. The system of claim 4, further comprising distribution means of said air located between said nacelle and said blades. 20. The system of claim 19, further comprising: first distribution means, associated to said nacelle and said volumes within said one or more blades, being adapted by means of said association to generate an intermittent flow of said air from said nacelle to said one or more blades. 21. The system of claim 20, further comprising an extender for the flow of said air connected to said volumes within said one or more blades. 22. The system of claim 21, wherein said extender includes baffles that further direct said air leaving said nacelle and entering said volumes within said one or more blades. 23. The system of claim 21, further comprising a distributing disc located between said nacelle and said extender. 24. The system of claim 23, wherein said distributing disc shows at least one or more through holes for the flow of said air, so that in at least an angular position of said distributing disc said trough holes are in correspondence of said extender. 25. The system of claim 21, further comprising: second distribution means associated to said extender, being adapted by means of said association to selectively allow the entry of said air into said volumes within said one or more blades. 26. The system of claim 25, wherein said second distribution means further comprises a second distributing disc being positioned to rotate inside said extender. 27. The system of claim 26, wherein said second distributing disc shows at least one or more through holes for the flow of said air, said through holes having an area substantially comparable with said volumes within said one or more blades. 28. The system of claim 4, wherein said external surface of said one or more blades is constructed by overlapping a multiplicity of shaped sheets having said holes. 29. The system of claim 28, wherein said external surface of said one or more blades is constructed using composite material. 30. The system of claim 28, wherein said external surface of said one or more blade includes an upper semi-shell and a lower semi-shell. 31. The system of claim 4, wherein at least part of said holes for the passage of said air have a constant section for the passage of said air. 32. The system of claim 4, wherein at least part of said holes for the passage of said air have a divergent shape with a substantially orthogonal axis. 33. The system of claim 4, wherein at least part of said holes for the passage of said air have substantially parallel walls and an inclined axis.
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