Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
  • F03D1/06—Rotors
  • F03D1/0608—Rotors characterised by their aerodynamic shape
  • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
  • F03D80/40—Ice detection; De-icing means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
  • F03D—WIND MOTORS
  • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
  • F03D1/06—Rotors
  • F03D1/065—Rotors characterised by their construction elements
  • F03D1/0675—Rotors characterised by their construction elements of the blades
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
  • F05B2260/00—Function
  • F05B2260/20—Heat transfer, e.g. cooling
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• the present invention relates to a wind turbine rotor blade and a method for deicing a wind turbine rotor blade.
• Wind turbines are increasingly being installed in areas where icing of the rotor blades of the wind turbine can occur. Icing the rotor blades of the wind turbine is not only dangerous, but also reduces the yield of the wind turbine. Therefore, many methods for early detection of icing of a rotor blade and for deicing a rotor blade are known. An icing of the rotor blade can be reduced or reduced, for example, by heating the rotor blade.
• Yield reduction occurs with icing of a rotor blade, especially in the nose area (i.e., the forward portion of the rotor blades). Therefore, many methods have been proposed for de-icing the nose portion of the rotor blades of wind turbines.
• German Patent and Trademark Office has in the priority application for the present application researched the following documents: DE 10 2010 051 296 A1; DE 10 2010 051 297 A1; DE 10 2010 051 293 A1; DE 10 2010 030 472 A1; DE 10 2005 034 131 A1; DE 195 28 862 A1 and DE 200 14 238 U1.
• a wind turbine rotor blade is provided with a rotor blade nose, a rotor blade trailing edge, a rotor blade root area for attachment of the rotor blade to a hub of a wind turbine and a rotor blade tip.
• the rotor blade extends from the rotor blade root region along a longitudinal axis to the rotor blade tip.
• the rotor blade further has an air distribution unit with an actuator for directing an air flow into the rotor blade nose region and / or a rotor blade trailing edge region.
• the air distribution unit is configured in a first operating mode such that an air flow is conducted into the rotor blade nose region. In a second operating mode, the air distribution unit is configured such that an air flow is conducted at least partially into the rotor blade trailing edge region.
• the air distribution unit can direct the air flow either to the rotor blade nose region or to the rotor blade trailing edge region, whereby a targeted deicing of the rotor blade or parts thereof is possible.
• at least a first cut along the longitudinal direction along the rotor blade from the rotor blade root area to the rotor blade tip is provided. By at least one web, the rotor blade interior is divided into different volumes, which are heated separately.
• the at least one web in the region of the rotor blade tip is configured such that an air flow in the rotor blade root nose region can be returned to the rotor blade root area along the at least one first web or between a first and second web.
• a closable opening of the first and / or second web can be provided in the area of the rotor blade tip, so that when the opening is open, the air flow can flow back through the trailing edge region back to the rotor blade root area and thus heat the trailing edge region.
• the air distribution unit has a first section for receiving heated air, a second section for directing the heated air flow into the region of the rotor blade trailing edge and a third section for directing the heated air flow into the rotor blade nose region.
• the rotor blade is provided for a wind turbine with at least one megawatt.
• the invention also relates to a method for deicing a wind turbine rotor blade.
• the wind turbine rotor blade has a rotor blade nose area, a rotor blade trailing edge, a rotor blade tip, and a rotor blade root area.
• a heated air flow is introduced into the rotor blade nose region, and in a second operating mode, a heated air flow is at least partially directed into the rotor blade trailing edge region of the wind turbine.
• the invention also relates to a wind energy plant with a rotor blade described above.
• the invention relates to the idea of reducing or avoiding not only icing in the nose region of the rotor blade, but also icing of the trailing edge region for improving the operation of the wind energy plant.
• a full-surface icing of the rotor blades ie also the rotor blade rear box, can lead to impairment of the operation of the wind turbine. Even if, for example, the hub area is heated up to such an extent by rotor blade heating that icing no longer exists there, it may still be that icing is still present in the region of the rotor blade rear box or the trailing edge area.
• the invention relates to the idea of heating not only the nose region of the rotor blade, but also the trailing edge region of the rotor blade, in order to produce a seal. avoidance. This is particularly important for wind turbines in the multi-megawatt range (ie> 1 megawatt).
• the invention relates to a wind turbine rotor blade, is injected in the warm or heated air, for example by a fan in the rotor blade and in particular along the nose region.
• webs may extend along the longitudinal direction of the rotor blade.
• an air guiding or air distribution unit is provided with an actuator, which can guide the air flow in the nose region or only to the rotor blade trailing edge region. This is advantageous because it is possible to dispense with a separate fan and an additional heating coil for blowing heated air through the trailing edge region.
• a heating of the trailing edge region can be performed by the adjustment of the actuator only in case of need and only as long as needed.
• FIG. 1 shows a schematic representation of a wind turbine rotor blade according to a first embodiment
• Fig. 2 shows a schematic representation of a wind turbine rotor blade according to a second embodiment
• Fig. 3 shows a schematic representation of a wind turbine according to the invention.
• Fig. 1 shows a schematic representation of a wind turbine rotor blade according to the invention.
• the rotor blade 10 has a rotor blade nose region 11 and a rotor blade trailing edge region 12.
• the rotor blade 10 also has a rotor blade zel Suite 14 and a rotor blade tip 13 on.
• the rotor blade 10 extends along its longitudinal direction from the rotor blade root 14 to the rotor blade tip 13.
• the first and second webs 210, 200 may be disposed substantially parallel to each other and between the pressure side and the suction side of the rotor blade.
• the internal volume of the rotor blade can be divided into three volumes, namely a volume between the two webs, a volume between a web and the rotor blade nose area, and a third volume between a web and the rotor blade trailing edge.
• the wind turbine rotor blade has an air flow distribution unit or guide unit 500.
• the rotor blade may include a diffuser 300 and a heater 400.
• a fan 600 may be connected, which can generate an air flow, which can flow through the diffuser 300 and the heater 400.
• the air distribution unit 500 serves to direct the heated air flow either along the rotor blade nose area 11 and / or along the rotor blade trailing edge 12 in order to deice the rotor blade.
• Fig. 2 shows a schematic representation of a wind turbine rotor blade according to a second embodiment.
• the rotor blade 10 has a rotor blade nose region 11, a rotor blade trailing edge 12, a rotor blade tip 13 and a rotor blade root region 14.
• the rotor blade can be connected by means of its rotor blade root region 14 to a hub 90 of a wind energy plant.
• the rotor blade 10 extends along its longitudinal direction from the rotor blade root region 14 to the rotor blade tip 13.
• the rotor blade blade has a rotor blade nose region 11 and a rotor blade trailing edge region or a rotor blade trailing edge region 12.
• a first and second web 200, 210 may be provided at least partially along the longitudinal direction of the rotor blade 10, so that the internal volume of the rotor blade can be divided into three volumes.
• the rotor blade root area 14 can be closed by a closing unit 700.
• the rotor blade may have a diffuser 300, a heating register 400, an airflow distribution unit 500.
• the airflow distribution unit 500 may include a first portion 510 that may be coupled to the heating register 400.
• the airflow distribution unit 500 further includes a second portion 520 and a third section 530. The second section 520 serves to direct the heated air flow into the region of the rotor blade trailing edge 12.
• the third section 530 of the air flow distribution unit 500 serves to direct the heated air flow at least partially along the rotor blade nose 1 1.
• the air distribution unit 500 further comprises an actuator 540, which can either open or close the second or third section 520, 530, so that an air flow 610, 620 through the second and / or third section 520, 530 is made possible. Alternatively, the actuator may also be partially opened so that the airflow may flow into both the nose region and the trailing edge region.
• a fan 800 can be provided, which can inject an air flow into the diffuser 300. The fan 800 may also be provided in the hub 90 of the wind turbine.
• the invention is based on the idea of using already existing components for de-icing a rotor blade of a wind power plant not only for de-icing the rotor blade nose area, but also for de-icing the rotor blade trailing edge 12. This is done by the heated air flow can be passed through an air distribution unit 500 not only in the rotor blade nose area 1 1, but also or only in the region of the rotor blade trailing edge.
• the control of the wind turbine can be used to de-ice the rotor blade trailing edge or the region of the rotor blade trailing edge by means of a heated air flow.
• a heated air flow for this purpose, only an air flow deflection unit or an air distribution unit 500 with an actuator 540 is used.
• the control of the wind turbine can in a first mode of a heated air flow in the rotor blade nose area 1 1 conduct.
• the heated air flow can be conducted through the air distribution unit into a region of the rotor blade trailing edge 12 instead of into the rotor blade nose region.
• the rear box can be heated and thus de-iced.
• the rotor blade trailing edge can thus be de-iced if necessary. If de-icing of the rotor blade inner edge is not required, the control of the wind turbine remains in the first mode and blows heated air into the rotor blade nose region.
• the actuator 540 may occupy a first position in the air distribution unit 500, ie, the airflow through the second portion 520 is avoided and the entire airflow may flow through the third portion 530 along the blade nose area to the rotor blade tip 13. Subsequently, the air flow between the first and second web 100, 200 again flow into the rotor blade root area 14, so that a cycle can arise.
• the rotor blade backbox portion may be separated from the heated airflow by the first web 210 and the actuator 540 so that only the rotor blade nose portion is heated.
• the energy loss of the back-flowing air is minimized and the maximum energy can be supplied at maximum surface in the rotor blade nose area.
• the actuator 540 in the second mode, may be adjusted such that airflow through the third portion 530 into the rotor blade nose area is avoided.
• the air flow heated by the fan 800 and by the heater 400 can flow through the second portion 520 in the rear portion toward the rotor blade tip 13.
• a perforation or openings in the webs can be provided in the region of the rotor blade tip so that the air flow can then flow back to the rotor blade root region 14 between the first and second webs 200, 210.
• the present invention is advantageous because de-icing of a rotor blade can be substantially improved merely by adding an air distribution unit.
• the actuator of the air distribution unit of the control of the wind turbine can be added a new degree of freedom.
• the rotor blades according to the invention are particularly suitable to be used in highly icing-prone areas. According to the invention, the entire rotor blade can be heated as needed and successively by an air flow.
• a rear box can be provided at the rotor blade trailing edge.
• a rear box can be mounted as a separate component on the rotor blade root-near region of the trailing edge. If the rear box is hollow, then the rear box may be heated in the second operating condition when the actuator of the air distribution unit is adjusted so that the heated air flows through the second portion 520 into the trailing edge region.
• the rotor blade according to the invention can optionally have a closable opening 900 in or on the first and / or second web in the region of the rotor blade tip.
• an air flow 620 which extends along the area of the rotor blade nose, can be conducted into the volume between the first and second web or into the volume between the first web 210 and the rotor blade trailing edge.
• the airflow 620 will also flow back through the volume between the first land 220 and the rotor blade trailing edge 12 back into the rotor blade root area.
• the air flow which flows along the rotor blade trailing edge will already have cooled (since it has already flowed along the rotor blade nose area), the air flow will nevertheless be able to contribute to heating the rotor blade trailing edge.
• one or two closable openings 710, 720 may be provided in or on a closing unit 700 for closing the rotor blade root area of the rotor blade.
• a closing unit 700 for closing the rotor blade root area of the rotor blade.
• Fig. 3 shows a schematic representation of a wind turbine according to the invention.
• the wind energy plant 100 has a tower 102 and a pod 104.
• an aerodynamic rotor 106 with three rotor blades 108 and a spinner 1 10 is arranged on the nacelle 104.
• the rotor 106 is set in rotation by the wind in rotation and thereby drives a generator in the nacelle 104 at.
• the rotor blades 108 may correspond to the rotor blades 10 according to FIGS. 1 and 2.

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• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Wind Motors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47222067

Family Applications (1)

Country Status (16)

Families Citing this family (7)

Family Cites Families (18)

• 2011
  • 2011-11-17 DE DE102011086603A patent/DE102011086603A1/de not_active Withdrawn
• 2012
  • 2012-11-16 BR BR112014011767A patent/BR112014011767A2/pt not_active IP Right Cessation
  • 2012-11-16 WO PCT/EP2012/072822 patent/WO2013072456A2/de active Application Filing
  • 2012-11-16 US US14/358,997 patent/US20140322027A1/en not_active Abandoned
  • 2012-11-16 TW TW101142921A patent/TW201335479A/zh unknown
  • 2012-11-16 CA CA2854238A patent/CA2854238A1/en not_active Abandoned
  • 2012-11-16 KR KR1020147016464A patent/KR20140089610A/ko not_active Application Discontinuation
  • 2012-11-16 CN CN201280056782.XA patent/CN103958890A/zh active Pending
  • 2012-11-16 AU AU2012338754A patent/AU2012338754A1/en not_active Abandoned
  • 2012-11-16 RU RU2014124337/06A patent/RU2014124337A/ru not_active Application Discontinuation
  • 2012-11-16 EP EP12790856.4A patent/EP2780586A2/de not_active Withdrawn
  • 2012-11-16 MX MX2014005921A patent/MX2014005921A/es not_active Application Discontinuation
  • 2012-11-16 JP JP2014541679A patent/JP2014533792A/ja not_active Ceased
  • 2012-11-16 AR ARP120104321A patent/AR088892A1/es unknown
• 2014
  • 2014-05-15 CL CL2014001284A patent/CL2014001284A1/es unknown
  • 2014-05-27 ZA ZA2014/03867A patent/ZA201403867B/en unknown

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