SE539438C2 - Method for blade heating system repair and wind turbine rotor blade - Google Patents
Method for blade heating system repair and wind turbine rotor blade Download PDFInfo
- Publication number
- SE539438C2 SE539438C2 SE1551642A SE1551642A SE539438C2 SE 539438 C2 SE539438 C2 SE 539438C2 SE 1551642 A SE1551642 A SE 1551642A SE 1551642 A SE1551642 A SE 1551642A SE 539438 C2 SE539438 C2 SE 539438C2
- Authority
- SE
- Sweden
- Prior art keywords
- heating system
- layer
- applying
- wind turbine
- perforated member
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005485 electric heating Methods 0.000 claims abstract description 5
- 239000004020 conductor Substances 0.000 claims abstract 3
- 230000002950 deficient Effects 0.000 claims abstract 3
- 229910052751 metal Inorganic materials 0.000 claims 6
- 239000002184 metal Substances 0.000 claims 6
- 230000005855 radiation Effects 0.000 claims 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- 229910045601 alloy Inorganic materials 0.000 claims 2
- 239000000956 alloy Substances 0.000 claims 2
- 239000004411 aluminium Substances 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 239000010949 copper Substances 0.000 claims 2
- 239000011347 resin Substances 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 229920001187 thermosetting polymer Polymers 0.000 claims 1
- 238000009755 vacuum infusion Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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
-
- 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
- F03D80/50—Maintenance or repair
-
- 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
-
- 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
- F03D80/50—Maintenance or repair
- F03D80/502—Maintenance or repair of rotors or blades
-
- 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
-
- 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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Landscapes
- 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
Abstract A method for repairing an electric heating system of a wind turbine rotor blade (1), which electricheating system comprises a heating system layer (7) of a material having a low conductivity andthrough which an electric current is directed. The method comprises freeing a defective region(11) of the heating system layer (7) of any exterior layers of material such that electricallyconducting parts of the heating system layer (7) are exposed and applying a perforated member(13) of an electrically conductive material onto the defective region of the heating system layer.The method further comprise bringing the perforated member (13) into electrical contact withelectrically conducting parts of the heating system layer (7), and applying a fixation layer (15)over the perforated member (13) in order to fixate the perforated member to the electricallyconducting parts of the heating system layer (7). A corresponding wind turbine rotor blade (1) is also described. (Pig. 3)
Description
METHOD FOR BLADE HEATING SYSTEM REPAIR AND WIND TURBINE ROTOR BLADE Technical field of the inventionThe present invention relates to a method for repairing an electric heating system of a wind turbine rotor blade, and a wind turbine rotor blade having a repair region.
Background Rotor blades on wind turbines are exposed to the weather conditions all year around.They are exposed to heat, cold, hard winds, rain, hail, snow and sometimes also to lightning,which causes degradation of the material and mechanical wear. Moreover, they are alsoexposed to mechanical wear from e.g. collisions with birds or other objects that may occasionallybe carried by the wind. ln wintertime, the wind turbine blades are subject to ice crust formation, due to highhumidity, snow and low temperatures. ln order to maintain wind turbine efficiency and ensureproduction also during winter conditions, the blades are often provided with blade heat systems.Usually, the blade heat systems are based either on hot air circulation within the blade, or basedon heating the blade surfaces directly. ln the direct heat systems, the heat is generally generated by directing electric currentthrough carbon fibre mats with low conductivity, which are applied on the exposed areas of theblade. Such mats are usually made from carbon fibre composite material. The direct heatingmethod is the predominantly used method for glass fibre composite blades and is more energyeffective than circulating air, since direct heating can be limited to areas subjected to ice crustbuild-up. The heating mats are therefore primarily applied on or near the leading edge on theouter half of the blade. The heating mat is then covered by a protective glass fibre fabric layer.Unfortunately, this is also an area that is exposed to collisions and lightning strikes, which bothmay damage the direct heating systems. The exposure to lightning strikes is unfortunately alsoenhanced by the carbon fibre mats acting as unintentional lightning rods. Thus it happens thatthe protective glass fibre layer is damaged to such a degree that the underlying carbon fibre matis exposed and also subjected to damage.
When the carbon fibre mats have been damaged, the damage will generate a hotspotas the electric currents are rerouted around the damaged region. At these hotspots, laminatetemperatures may exceed the matrix/epoxy degradation temperature, which is potentiallydangerous since the operation of the heat system may aggravate the damage, eventuallyleading to catastrophic failure.
Claims (13)
1. A method for repairing an electric heating system of a wind turbine rotor blade (1), whichelectric heating system comprises a heating system layer (7) of a material having a lowconductivity and through which an electric current is directed, the method comprising - freeing a defective region (1 1) of the heating system layer (7) of any exterior layers of materialsuch that electrically conducting parts of the heating system layer (7) are exposed, - applying a perforated member (13) of an electrically conductive material over the defectiveregion (11) of the heating system layer (7), - bringing the perforated member (13) into electrical contact with electrically conducting parts ofthe heating system layer (7), and - applying a fixation layer (15) over the perforated member (13) in order to fixate the perforatedmember to the electrically conducting parts of the heating system layer (7).
2. The method according to claim 1, comprising applying a vacuum bag such that the vacuumbag covers the perforated member (13) and applying a vacuum pressure in said vacuum bag,prior to applying the fixation layer (15).
3. The method according to any one of the preceding claims, comprising applying a fixation layer(15) comprising a thermosetting material.
4. The method according to any one of the preceding claims, comprising applying a fixation layer(15) comprising an ultra-violet radiation curable resin material.
5. The method according to any one of claims 3-4, comprising using ultra violet radiation to curethe fixation layer (15).
6. The method according to any one of the preceding claims, comprising applying the fixation layer (15) by vacuum infusion.
7. The method according to any one of the preceding claims, comprising providing a perforatedmember (13) of an electrically conductive metal.
8. The method according to claim 7, comprising providing a perforated member (13) of copper metal or aluminium metal, or alloys thereof.
9. The method according to any one of the preceding claims, comprising applying a cover layer (17) over the fixation layer (15).
10. The method according to any one of the preceding claims, wherein it is performed on the rotor blade mounted on the wind turbine, when the wind turbine is installed on an operation site.
11. A wind turbine rotor blade (1) provided with an electric heating system comprising a heatingsystem layer (7) of a material having a low conductivity and through which an electric current isdirected, characterized in the rotor blade having a repair region (21) comprising a perforatedmember (13) of an electrically conductive material applied onto a region of the heating systemlayer (7), and a fixation layer (15) applied over the perforated member (13) in order to fixate the perforated member to electrically conducting parts of the heating system layer (7).
12. The wind turbine rotor blade according to claim 11, wherein the fixation layer (15) comprises an ultraviolet radiation cured resin material.
13. The wind turbine rotor blade according to any one of claims 11-12, wherein the perforatedmember (13) is made of an electrically conductive metal, such as copper metal or aluminium metal, or alloys thereof.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1551642A SE539438C2 (en) | 2015-12-14 | 2015-12-14 | Method for blade heating system repair and wind turbine rotor blade |
| FI20165961A FI20165961A (en) | 2015-12-14 | 2016-12-13 | Method for Repairing a Wind Turbine Rotor Blade Electric Heating System and a Wind Turbine Rotor Blade with a Repair Area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1551642A SE539438C2 (en) | 2015-12-14 | 2015-12-14 | Method for blade heating system repair and wind turbine rotor blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1551642A1 SE1551642A1 (en) | 2017-06-15 |
| SE539438C2 true SE539438C2 (en) | 2017-09-19 |
Family
ID=59270199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1551642A SE539438C2 (en) | 2015-12-14 | 2015-12-14 | Method for blade heating system repair and wind turbine rotor blade |
Country Status (2)
| Country | Link |
|---|---|
| FI (1) | FI20165961A (en) |
| SE (1) | SE539438C2 (en) |
-
2015
- 2015-12-14 SE SE1551642A patent/SE539438C2/en unknown
-
2016
- 2016-12-13 FI FI20165961A patent/FI20165961A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| FI20165961A (en) | 2017-06-15 |
| SE1551642A1 (en) | 2017-06-15 |
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