WO2021198902A1 - Pointe de pale de rotor déployable d'une éolienne utilisant un matériau à mémoire de forme - Google Patents

Pointe de pale de rotor déployable d'une éolienne utilisant un matériau à mémoire de forme Download PDF

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Publication number
WO2021198902A1
WO2021198902A1 PCT/IB2021/052618 IB2021052618W WO2021198902A1 WO 2021198902 A1 WO2021198902 A1 WO 2021198902A1 IB 2021052618 W IB2021052618 W IB 2021052618W WO 2021198902 A1 WO2021198902 A1 WO 2021198902A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
reconfigurable portion
reconfigurable
shape
wind turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2021/052618
Other languages
English (en)
Inventor
Hariharan MURUGESAN
Sundaravadivel MUNUSAMY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L&T Technology Services Ltd
Original Assignee
L&T Technology Services Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L&T Technology Services Ltd filed Critical L&T Technology Services Ltd
Publication of WO2021198902A1 publication Critical patent/WO2021198902A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F03D1/065—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
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/307—Blade tip, e.g. winglets
    • 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
    • F05B2240/00—Components
    • F05B2240/20—Rotors
    • F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
    • 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
    • F05B2280/00—Materials; Properties thereof
    • F05B2280/50—Intrinsic material properties or characteristics
    • F05B2280/5006—Shape memory
    • 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

  • This disclosure relates generally to blades of a wind turbine, and more particularly to the blades of wind turbines that use a shape memory material.
  • the blade length of the rotor blade associated with the wind turbine may reach beyond a large size, such as, a size of 100 meters.
  • a blade length beyond 32 meters may cross an upper limit of consignment carrying capacity of road transportation means, and may demand some special kind of transportation.
  • Such special kind of transportation may prove time-consuming and expensive.
  • the transportation of the huge blades may consume more time, manpower, and may have higher possibility of damage during the transportation.
  • a blade of a wind turbine may include at least one non-reconfigurable portion having a fixed shape, and at least one reconfigurable portion attached to the at least one non-reconfigurable portion.
  • the at least one reconfigurable portion may be reconfigurable between a first predetermined shape and a second predetermined shape, in response to application of a stimuli.
  • the at least one reconfigurable portion and the at least one non-reconfigurable portion may cooperate to form the full-length of the blade of the wind turbine.
  • a method of installing a blade on a wind turbine may include receiving the blade on a wind turbine site in a first state of the blade.
  • the blade may include at least one non-reconfigurable portion having a fixed shape.
  • the blade may further include at least one reconfigurable portion attached to the at least one non- reconfigurable portion.
  • the at least one reconfigurable portion may be reconfigurable between a first predetermined shape and a second predetermined shape, in response to application of a stimuli.
  • the at least one reconfigurable portion may be of the first predetermined shape the method may further include applying the stimuli to the at least one reconfigurable portion to obtain a second state of the blade.
  • the at least one reconfigurable portion may be of the predetermined shape. Further, in the second state of the blade, the at least one reconfigurable portion and the at least one non-reconfigurable portion may cooperate to form the full-length of the blade.
  • FIG. 1A illustrates a perspective view of a blade of a wind turbine in a folded shape, in accordance with an embodiment of the present disclosure.
  • FIG. IB illustrates a side view of a blade of a wind turbine in a folded shape, in accordance with an embodiment of the present disclosure.
  • FIG. 1C illustrates a perspective view of the blade of the wind turbine in an expanded state, in accordance with an embodiment of the present disclosure.
  • FIG. ID illustrates another perspective view of a blade of a wind turbine in a folded shape, in accordance with another embodiment of the present disclosure.
  • FIG. IE illustrates a zoomed-in view of a blade of a wind turbine, in accordance with an embodiment of the present disclosure.
  • FIG. IF illustrates a rotor of a wind turbine having three blades in a folded shape, in accordance with an embodiment of the present disclosure.
  • FIG. 1G illustrates a rotor of a wind turbine having three blades in an expanded (original) state, in accordance with an embodiment of the present disclosure.
  • FIG. 2A illustrates a perspective view of a blade of a wind turbine in a rolled shape, in accordance with another embodiment of the present disclosure.
  • FIG. 2B illustrates a perspective view of the blade of the wind turbine in an expanded state, in accordance with another embodiment of the present disclosure.
  • FIGS. 3A-3G illustrate line diagrams of a blade of a wind turbine in a folded state and an expanded state, in accordance with another embodiment of the present disclosure.
  • FIGS. 4A-4B illustrate line diagrams of the blade of a wind turbine in a rolled state and an expanded state respectively, in accordance with another embodiment of the present disclosure.
  • FIG. 5 is a flowchart that illustrates an exemplary method for installing a blade on a wind turbine, in accordance with an embodiment of the present disclosure.
  • the following described implementations may be found in the disclosed blade for a wind turbine and a method for installing a blade on a wind turbine.
  • the disclosed blade used for a wind turbine and the method for installing the blade on the wind turbine may be capable of folding or rolling during handling stage and expanding to original size and shape during functional stage of using the blade for the wind turbine. Consequently, the blade may become compact and may be easily transported.
  • FIG. 1A and FIG. IB a perspective view 100A and a side view 100B, respectively, of a blade 100 of a wind turbine in a folded shape is illustrated, in accordance with an embodiment of the present disclosure.
  • the blade 100 may include at least one non-reconfigurable portion (also referred as a rigid portion) having a fixed shape.
  • the blade 100 may include a first non-reconfigurable portion 102 A and a second non-reconfigurable portion 102B.
  • the first non-reconfigurable portion 102A and the second non- reconfigurable portion 102B may be made up of a composite material. It may be noted that the construction of the first non-reconfigurable portion 102 A and the second non-reconfigurable portion 102B may be similar to that of a conventionally known blade. Further, the composite material may be a conventionally known material suitable for making blades of wind turbines. Further, the first non-reconfigurable portion 102A and the second non-reconfigurable portion 102B may have a non- reconfigurable shape.
  • the blade 100 may further include a reconfigurable portion attached to the at least one non-reconfigurable portion (such as, the first non-reconfigurable portion 102A or the second non-reconfigurable portion 102B).
  • a reconfigurable portion attached to the at least one non-reconfigurable portion (such as, the first non-reconfigurable portion 102A or the second non-reconfigurable portion 102B).
  • the blade 100 includes a reconfigurable portion 104 attached to the first non-reconfigurable portion 102A through one end and to the second non-reconfigurable portion 102B through the other end of the reconfigurable portion 104.
  • the reconfigurable portion 104 may be flexible and, therefore, configurable between a first predetermined shape and a second predetermined shape in response to application of a stimuli. It will be apparent to a person skilled in the art that the configurability of the reconfigurable portion 104 is not limited to the first and second predetermined shape.
  • the stimuli may include subjecting the reconfigurable portion 104 to at least one of a temperature, a pressure, an electric filed, or a magnetic field. It will be apparent to a person skilled in the art that a predefined value associated with the temperature, the pressure, the electric filed, or the magnetic field may be applied.
  • the reconfigurable portion 104 of the blade 100 may be made up of a shape memory material.
  • the shape memory material may correspond to, without limitation, a Shape Memory Alloy (SMA) and a Shape Memory Polymer.
  • SMA Shape Memory Alloy
  • the SMA corresponds to an alloy that may be in a deformed shape when not charged, but may return to a pre-deformed shape when a stimulus of heat is applied.
  • the SMA is deformed when in a cold state and returns to the pre-deformed shape when gets heated. On heating, transformation of the blade starts is completed at a certain temperature, depending on the SMA composition or loading conditions.
  • the SMA of the reconfigurable portion 104 is in a deformed shape (also referred as the first predetermined shape), and as such, the reconfigurable portion 104 may be in a bent shape or folded state.
  • Such bent shape of the reconfigurable portion 104 may allow the blade 100 to be folded, with the second non-reconfigurable portion 102B of the blade bent over the first non-reconfigurable portion 102A. Therefore, the blade 100 may become compact and may be easily transported.
  • the SMA may be selected from at least one of, without limitation, a copper-base alloy, a silver-cadmium alloy, a gold-cadmium alloy, a copper-aluminum- nickel alloy, or a copper- zinc alloy.
  • the blade 100 may be corrosion resistant.
  • the SMA may typically be made by casting, using vacuum arc melting or induction melting.
  • the way in which the SMA may be trained depends on properties wanted, such as blades suitable for energy harvesting applications using wind turbines.
  • the training may dictate the shape that the SMA remembers when heated. This occurs by heating the SMA so that the dislocations re-order into stable positions, but not so hot that the material recrystallizes.
  • the reconfigurable portion 104 of the blade 100 may further include one or more reinforcement members to strengthen the reconfigurable portion 104 that is made up of the shape memory material (such as, the SMA).
  • the shape memory material such as, the SMA
  • FIG. 1C a perspective view lOOC of the blade 100 of a wind turbine in the second predetermined shape (expanded state) is illustrated, in accordance with an embodiment of the present disclosure.
  • the reconfigurable portion 104 may be reconfigurable between the first predetermined shape and the second predetermined shape, in response to application of a stimuli.
  • the reconfigurable portion 104, the first non-reconfigurable portion 102 A, and the second non-reconfigurable portion 102 A together form the blade 100 of full length for the wind turbine.
  • the reconfigurable portion 104 of the blade 100 may be configured to be in the second predetermined shape, based on the application of the stimuli (such as, heat).
  • the SMA of the reconfigurable portion 104 is in a pre-deformed shape.
  • the pre-deformed shape may be accomplished by charging the SMA, for example, by heating the SMA.
  • the reconfigurable portion 104 may take a straightened shape. Such straightened shape of the reconfigurable portion 104 may cause the blade 100 to attain the expanded state, with the second non-reconfigurable portion 102B stretching across the first non-reconfigurable portion 102A.
  • the reconfigurable portion 104 may be indicative of a transition state from a folding state to an expanded state. Therefore, upon bringing the blade 100 into the expanded state, the blade 100 may be installed on the wind turbine, and used for operations of generating power through the wind turbine.
  • a length of the non-reconfigurable portion (such as, the first non-reconfigurable portion 102A) of the blade 100 may be in a range of 60-70 % of full length of the blade and a length of the non-reconfigurable portion (such as, the reconfigurable portion 104) may be in a range of 30-40 % of the full length of the blade.
  • the non-reconfigurable portion is 70 meters and the reconfigurable portion is 30 meters.
  • the SMA can be formed into a shape (such as, the second predetermined shape/ pre-deformed shape) and then set to that shape by a high heat treatment. When cooled, the SMA may be bent (such as, the first predetermined shape), stretched or deformed (within limits), and then with subsequent moderate heating, (below the heat setting temperature), the SMA can recover some or all of the deformation. Such properties of the SMA may be used to design the flexible blades (such as, the blade 100) for wind turbines.
  • the SMA may be selected from a combination of at least one, and without limitation, a copper-base alloy, a silver-cadmium alloy, a gold-cadmium alloy, a copper-aluminum-nickel alloy, and a copper-zinc alloy.
  • the reconfigurable portion 104 may include a mixture of the SMA and a composite material.
  • the application of charge on the reconfigurable portion 104 may provide the heat to the SMA.
  • the heated SMA may change the first shape of the reconfigurable portion 104 from its folded shape to the second shape of the reconfigurable portion 104 in the expanded (original) state.
  • FIG. ID another perspective view 100D of the blade 100 in a folded shape is illustrated, in accordance with an embodiment of the present disclosure.
  • FIG. IE further shows a zoomed-in view 100E of the blade 100.
  • the blade 100 may include the first non-reconfigurable portion 102A, the second non-reconfigurable portion 102B, and the reconfigurable portion 104 with the zoomed-in view.
  • the reconfigurable portion 104 may be positioned between the first non-reconfigurable portion 102A and the second non-reconfigurable portion 102B.
  • the reconfigurable portion 104 may include a mixture of the SMA and a composite material, for example, multiple layers of the SMA and the composite material placed adjacent to each other.
  • the reconfigurable portion 104 may include one or more reinforcement members to strengthen the reconfigurable portion 104 comprising the shape memory alloy.
  • FIG. IF a rotor 100F of a wind turbine having three blades in folded shape is illustrated.
  • each blade of the three blades correspond to the blade 100.
  • FIG. 1G illustrates a rotor 100G of a wind turbine having three blades in an expanded (original) state.
  • each blade of the three blades correspond to the blade 100.
  • the expanded state may correspond to the second predetermined shape of the each of the three blades 100.
  • FIG. 2A a perspective view 200A of a blade 200 of a wind turbine in a rolled state is illustrated, in accordance with another embodiment of the present disclosure.
  • the blade 200 may include a non-reconfigurable portion 202.
  • the non-reconfigurable portion 202 may be made up of a composite material. It may be noted that the construction of the non-reconfigurable portion 202 may be similar to that of a conventionally known blade. Further, the composite material may be a conventionally known material suitable for making blades of wind turbines.
  • the non-reconfigurable portion 202 may have a non-reconfigurable shape, that is, a fixed shape.
  • the blade 200 may further include a reconfigurable portion 204 attached to the non- reconfigurable portion 202.
  • the reconfigurable portion 204 may be attached to the non-reconfigurable portion 202 at a distal end of the non-reconfigurable portion 202.
  • the reconfigurable portion 204 of the blade 200 may be flexible and, therefore, reconfigurable between a first predetermined shape (in a deformed shape) and a second predetermined shape (in a pre-deformed shape) based on an application of a stimuli.
  • the reconfigurable portion 204 may be made up of a Shape Memory Material (such as, the SMA).
  • shape Memory Material may be in a deformed shape when not charged and may return to the pre-deformed shape when charged.
  • the SMA may be deformed when cold and may return to pre-deformed shape when heated.
  • the SMA of the reconfigurable portion 204 may be in a deformed shape.
  • the reconfigurable portion 204 may be rolled over itself towards the non-reconfigurable portion 202. Such shape of the reconfigurable portion 204 may allow the blade 200 to be rolled, with the reconfigurable portion 204 rolled into a compact shape. Therefore, the blade 200 overall becomes compact and can be easily transported.
  • FIG. 2B a perspective view 200B of the blade 200 of a wind turbine in an expanded state is illustrated, in accordance with an embodiment of the present disclosure.
  • the rolled state is already discussed in FIG. 2A.
  • the reconfigurable portion 204 may be configured to be in a second predetermined shape.
  • the reconfigurable portion 204 may take a straightened shape.
  • the straightened shape of the reconfigurable portion 204 may cause the blade 100 to attain the expanded state, with the reconfigurable portion 204 unrolling to straighten out.
  • the blade 200 Upon brining the blade 200 into the expanded state, the blade 200 may be installed on the wind turbine and used for operations of generating power through the wind turbine.
  • a method of installing a blade on a wind turbine is disclosed in description of FIG. 5.
  • FIGS. 3A-3G illustrates line diagrams 300A-300G of the blade 100 of a wind turbine corresponding to FIGS. 1A-1G in a folded state and an expanded state, in accordance with an embodiment of the present disclosure.
  • the description for the blade 100 as illustrated in FIGS. 3A- 3G is same as described for FIGS. 1A-1G.
  • FIGS. 4A-4B illustrates line diagrams 400A-400B of the blade 200 of a wind turbine corresponding to FIGS. 2A-2B in a rolled state and an expanded state, in accordance with an embodiment of the present disclosure.
  • the description for the blade 200 as illustrated in FIGS. 4A- 4B is same as described for FIGS. 2A-2B.
  • FIG. 5 is a flowchart 500 that illustrates an exemplary method for installing a blade on a wind turbine, in accordance with an embodiment of the present disclosure. With reference to FIG. 5, there is shown a flowchart 500. The operations of the flowchart 500 may start at step 502 and proceed to 504.
  • a blade 100 may be received on a wind turbine site in a first state of the blade 100.
  • the blade 100 may include at least one non-reconfigurable portion 102.
  • the at least one non-reconfigurable portion 102 has a fixed shape.
  • the at least one reconfigurable portion 104 may be attached to the at least one non-reconfigurable portion 102.
  • the at least one reconfigurable portion 104 may be reconfigurable between a first predetermined shape and a second predetermined shape, based on an application of a stimuli.
  • the at least one reconfigurable portion 104 in the first state of the blade, is of the first predetermined shape.
  • the reconfigurable portion 104 comprises a shape memory alloy.
  • the shape memory alloy may be selected from at least one of, but not limited to, a copper-base alloy, a silver- cadmium alloy, a gold-cadmium alloy, a copper-aluminum-nickel alloy, and a copper-zinc alloy.
  • any shape memory material may be used for the reconfigurable portion 104, such as a shape memory polymer.
  • the stimuli may be applied to the at least one reconfigurable portion 104 to obtain a second state of the blade.
  • the at least one reconfigurable portion 104 in the second state of the blade 100, may be of the predetermined shape.
  • the at least one reconfigurable portion 104 and the at least one non -reconfigurable portion 102 may together form the full-length blade 100 of the wind turbine.
  • the applying of stimuli may include subjecting the reconfigurable portion 104 to at least one of temperature, pressure, an electric filed, or a magnetic field.
  • the blade 100 may be mounted in the second state of the blade 100 on the wind turbine.
  • the second state may correspond to an expanded state of the blade.
  • the present disclosure discusses a flexible type rotor blade of wind turbine.
  • the blade may include the SMA which may be integrated with a composite material of rotor blade.
  • the above- mentioned technique may provide a cost-effective solution for transporting wind turbine blades in its folded or rolled form, such that the blade may be brought into its expanded shape and erected on the wind turbine.
  • the techniques make the transportation of the blades time-efficient. Further, the techniques provide for easy handling of the blades during production, further help to prevent damage to the integrity of the blade during transportation.

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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)
  • Wind Motors (AREA)

Abstract

L'invention concerne une pale (100) d'une éolienne et un procédé d'installation de la pale (100) sur l'éolienne. La pale (100) peut comprendre au moins une partie non reconfigurable (102) et au moins une partie reconfigurable (104) fixée à l'au moins une partie non reconfigurable (102). L'au moins une partie non reconfigurable (102) peut avoir une forme fixe. L'au moins une partie reconfigurable (104) peut être reconfigurable entre une première forme prédéterminée et une seconde forme prédéterminée, en réponse à l'application d'un stimulus. Dans la seconde forme prédéterminée de l'au moins une partie reconfigurable (104), cette dernière et l'au moins une partie non reconfigurable (102) peuvent coopérer pour former la pleine longueur de la pale (100) de l'éolienne.
PCT/IB2021/052618 2020-03-31 2021-03-30 Pointe de pale de rotor déployable d'une éolienne utilisant un matériau à mémoire de forme Ceased WO2021198902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041014152 2020-03-31
IN202041014152 2020-03-31

Publications (1)

Publication Number Publication Date
WO2021198902A1 true WO2021198902A1 (fr) 2021-10-07

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ID=77929873

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PCT/IB2021/052618 Ceased WO2021198902A1 (fr) 2020-03-31 2021-03-30 Pointe de pale de rotor déployable d'une éolienne utilisant un matériau à mémoire de forme

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180135596A1 (en) * 2016-11-17 2018-05-17 General Electric Company System for wind turbine blade actuation
WO2019210330A1 (fr) * 2018-04-28 2019-10-31 The Research Foundation For The State University Of New York Pale flexible d'éolienne, à répartition de torsion activement variable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180135596A1 (en) * 2016-11-17 2018-05-17 General Electric Company System for wind turbine blade actuation
WO2019210330A1 (fr) * 2018-04-28 2019-10-31 The Research Foundation For The State University Of New York Pale flexible d'éolienne, à répartition de torsion activement variable

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