CA2961243A1 - Vertical axis wind turbine - Google Patents
Vertical axis wind turbine Download PDFInfo
- Publication number
- CA2961243A1 CA2961243A1 CA2961243A CA2961243A CA2961243A1 CA 2961243 A1 CA2961243 A1 CA 2961243A1 CA 2961243 A CA2961243 A CA 2961243A CA 2961243 A CA2961243 A CA 2961243A CA 2961243 A1 CA2961243 A1 CA 2961243A1
- Authority
- CA
- Canada
- Prior art keywords
- edge protector
- wind turbine
- improve
- blades
- vertical axis
- 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.)
- Abandoned
Links
- 230000001012 protector Effects 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229920003023 plastic Polymers 0.000 claims abstract description 9
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 229920002635 polyurethane Polymers 0.000 claims abstract description 4
- 239000004814 polyurethane Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 7
- 241000288673 Chiroptera Species 0.000 abstract description 4
- 238000004026 adhesive bonding Methods 0.000 abstract description 2
- 239000011888 foil Substances 0.000 abstract 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/02—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having a plurality of 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/04—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor having stationary wind-guiding means, e.g. with shrouds or channels
-
- 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
- F03D3/062—Rotors characterised by their construction elements
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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
This invention pertains to improvements on the turbine concept of the above patent by attaching EDGE PROTECTORS to the rotor blades of said concept.
These improvements list as follows:
1. Shorten the production time and thus costs of the existing concept.
2. Improve the aerodynamic efficiency by a valuable degree.
3. Increase the swept area as a bonus.
4. Improve the protection of birds and bats.
This Edge Protector is to be produced by continuous extrusion and cut to length as to fit the length of the rotor blades.
The cross section of the edge protector will look very similar to an airplane wing or an air foil.
The most suitable plastic material should be polyurethane with optimized softness and flexibility; very likely a compromise for accommodating somewhat competing demands between points 2. 3. and 4. of the list of improvements.
The methods of choice for attaching and fastening the edge protector to the blades will be gluing or riveting, with the latter preferable with regard to easy replacement.
Technical Field The invention relates to a vertical axis wind turbine, and in particular the one described in Canadian patent 2,546,750 Background Art As reported in said patent. (I assume there is no need to reiterate the entire text here again).
Disclosure of Invention The object of the invention is to improve on the overall quality of the Vertical Axis Wind Turbine, according to said patent on four accounts:
1. Shorten the production time and ¨ costs of said wind turbine.
2. Improve the aerodynamic efficiency by a measurable degree.
3. Increase the swept area without having to change any other substantial parameter.
4. Improve on the protection of Birds and bats.
As to point 1.
The leading edges of the blades, in the referenced patent there are six blades per rotor, running over the whole length of those rotors, feature sharp edges due to the production process. These edges have to be deburred, or even better, rounded by grinding. This is either a very
These improvements list as follows:
1. Shorten the production time and thus costs of the existing concept.
2. Improve the aerodynamic efficiency by a valuable degree.
3. Increase the swept area as a bonus.
4. Improve the protection of birds and bats.
This Edge Protector is to be produced by continuous extrusion and cut to length as to fit the length of the rotor blades.
The cross section of the edge protector will look very similar to an airplane wing or an air foil.
The most suitable plastic material should be polyurethane with optimized softness and flexibility; very likely a compromise for accommodating somewhat competing demands between points 2. 3. and 4. of the list of improvements.
The methods of choice for attaching and fastening the edge protector to the blades will be gluing or riveting, with the latter preferable with regard to easy replacement.
Technical Field The invention relates to a vertical axis wind turbine, and in particular the one described in Canadian patent 2,546,750 Background Art As reported in said patent. (I assume there is no need to reiterate the entire text here again).
Disclosure of Invention The object of the invention is to improve on the overall quality of the Vertical Axis Wind Turbine, according to said patent on four accounts:
1. Shorten the production time and ¨ costs of said wind turbine.
2. Improve the aerodynamic efficiency by a measurable degree.
3. Increase the swept area without having to change any other substantial parameter.
4. Improve on the protection of Birds and bats.
As to point 1.
The leading edges of the blades, in the referenced patent there are six blades per rotor, running over the whole length of those rotors, feature sharp edges due to the production process. These edges have to be deburred, or even better, rounded by grinding. This is either a very
Description
30 The methods of choice for attaching and fastening the edge protector to the 31 blades will be gluing or riveting, with the latter preferable with regard to easy 32 replacement.
34 Technical Field 35 The invention relates to a vertical axis wind turbine, and in particular the one 36 described in Canadian patent 2,546,750 38 Background Art 39 As reported in said patent. (I assume there is no need to reiterate the entire text 40 here again).
42 Disclosure of Invention 43 The object of the invention is to improve on the overall quality of the 44 Vertical Axis Wind Turbine, according to said patent on four accounts:
45 1. Shorten the production time and ¨ costs of said wind turbine.
46 2. Improve the aerodynamic efficiency by a measurable degree.
47 3. Increase the swept area without having to change any other 48 substantial parameter.
49 4. Improve on the protection of Birds and bats.
50 As to point 1.
51 The leading edges of the blades, in the referenced patent there are six 52 blades per rotor, running over the whole length of those rotors, feature 53 sharp edges due to the production process. These edges have to be 54 deburred, or even better, rounded by grinding. This is either a very 56 labour intensive and cumbersome procedure or, halve way automated, 57 would demand expensive investment in machinery.
58 The Edge Protector according to this invention will eliminate the 59 necessity of grinding the blade edges.
60 As to point 2.
61 Sharp leading edges on the blades cause micro turbulences which 62 substantially decrease the aerodynamic efficiency of said turbine 63 concept. So far, to decrease this negative effect, the blade edges have 64 to be ground for deburring, or even better, rounding, which is labour 65 intensive and cumbersome. An investment in a semi ¨ automated 66 grinding process has not been considered because of the high costs.
67 The Edge Protector according to this invention eliminates the necessity 68 of grinding the edges.
69 As to point 3.
70 The power output of a wind turbine calculates as product of wind 71 speed (to the power of 3) times the swept area. Thus, increasing the 72 swept area without altering any other substantial parameter of the 73 wind turbine related to this invention is very desirable.
74 The Edge Protector according to this invention provides for this extra 75 bonus.
76 As to point 4.
77 The casualties amongst birds and bats caused by the now prevailing 78 horizontal axis wind turbines with three blades are well known and 79 documented. Although the subject Vertical Axis Wind Turbine presents 80 a solid object in the landscape into which to fly a bird must be blind, to 81 decrease the damage done to a flying animal upon impact is very 82 desirable, and would certainly qualify the resistance of wild life activists 84 against wind turbines. So, the Edge Protector has to be as soft as 85 possible while not compromising other technical requirements, i.e. the 86 mechanical strength necessary to withstand the stress exerted on the 87 Edge Protector by the impact of the wind force.
88 The Edge Protector according to this invention would substantially 89 contribute to the acceptance of the subject wind turbine.
91 Brief Description of Drawings 92 Since Figures of the previous Canadian Patent 2,546,750 are made use 93 of with this application, their reference numbers for items/parts are 94 used as they are. For distinction, the reference numbers for new items/parts in this application are shown within brackets, for instance 96 (1) which is actually the only new one, representing the Edge Protector.
97 Thus, FIG. 1 shows a cross section or top view of the Edge Protector (1) 98 attached to one rotor blade 15. The figure is not to scale for the sake of 99 better clarity.
loo FIG. 2 shows a top view of the previous patent with only one Edge 101 Protector (1) attached to one blade 15 of each rotor 11. This FIG. 2 102 shows also, that the deflector flaps 18 will have to be shortened in 103 order to create the greater daylight for the Edge Protectors to clear said 104 deflector flaps, as shown as (3) in FIG. 2, only on the right rotor 11.
This los would be the only none substantial modification to said turbine.
106 Also, FIG. 2 shows that the swept area will be larger by the Edge 107 Protectors' (1) extension beyond the rotor radius without the necessity 108 to change any other substantial parameter of the turbine according 109 Canadian Patent 2,546,750.
112 FIG. 3 shows a front view of the rotor assembly with one Edge Protector 113 (1) attached to and running down the whole length of one blade 15.
114 Again, the depictions are not to scale for better clarity.
116 Preferred Method for the Production of the Edge Protector 117 The preferred production method is extrusion of any suitable plastic 118 material i.e. PVC, ABS or Polyurethane. Suitable means the material has 119 to have properties satisfying the prerequisites as stated in the second 120 last paragraph in the Abstract and in point 4. in the Disclosure of 121 Invention. Additionally, the chosen material must be weather proof, 122 tolerating fluctuations in temperature, air humidity and ultraviolet 123 radiation. And it has to withstand the mechanic stress exerted by the 124 wind power on the blades. If the service life of the wind turbine is 125 longer than that of the Edge Protector, riveting to the blades would be 126 the method of choice for attaching the Edge Protectors to the blades.
127 The extrusion process is continuous and there are two ways of 128 transporting the Edge Protector to the site of application: in quasi 129 endless roll, not totally endless of course, rather rolled up to diameters 130 allowed for by traffic regulations, for the purpose of whole sale without 131 knowing the size if the wind turbine or the length of the rotor blades, 132 whereby the Edge Protector can be cut to size by hack saw or power 133 circular saw. For orders where the turbine sizes respectively the blade 134 lengths are known, the Edge Protector can be cut to length 135 automatically by means of parallel travelling and returning power 136 circular saw length the out feed lane of the extruder. The cut-off pieces 137 can be automatically packaged in any preprogrammed numbers, shrink 138 rapped or protected otherwise for transportation.
141 In the case of the construction of large wind farms it may be 142 economical to have an extrusion plant put on a flatbed trailer stationed 143 at the farm site for producing the Edge Protector right on the spot.
145 Clarification 146 In the disclosure of the invention the term "leading edge" is used, 147 which needs a definition or an explanation.
148 FIG. 2 shows two circular arrows (2) which indicate the rotors' spinning 149 directions: the left rotor spins clockwise, the right rotor spins counter 150 clockwise. Looked at it without any other defining consideration, the 151 leading edge would be the inside edge of the blade. But looking at the 152 pertinent aerodynamics, the leading edge of the blade is the one 153 ending on the circumference of the rotor, because the flowing air hits 154 this outer edge first.
156 Claims 157 1. An Edge Protector as a substantial improvement to the qualities 158 of a Twin Rotor Vertical Axis Wind Turbine according to the 159 Canadian Patent 2,546,750, with four points of improvements as 160 described in the abstract and disclosure of this application; with 161 the Edge Protector shaped like an airfoil similar to modern air 162 craft wings.
163 2. An Edge Protector, according to claim 1. produced by continuous 164 extrusion.
165 3. Said Edge Protector, according to claims 1 & 2, made of plastic 166 material available on the commercial plastic material market, i.e.
167 PVC, ABS and Polyurethane or any other material suitable to 168 production by plastic extrusion.
34 Technical Field 35 The invention relates to a vertical axis wind turbine, and in particular the one 36 described in Canadian patent 2,546,750 38 Background Art 39 As reported in said patent. (I assume there is no need to reiterate the entire text 40 here again).
42 Disclosure of Invention 43 The object of the invention is to improve on the overall quality of the 44 Vertical Axis Wind Turbine, according to said patent on four accounts:
45 1. Shorten the production time and ¨ costs of said wind turbine.
46 2. Improve the aerodynamic efficiency by a measurable degree.
47 3. Increase the swept area without having to change any other 48 substantial parameter.
49 4. Improve on the protection of Birds and bats.
50 As to point 1.
51 The leading edges of the blades, in the referenced patent there are six 52 blades per rotor, running over the whole length of those rotors, feature 53 sharp edges due to the production process. These edges have to be 54 deburred, or even better, rounded by grinding. This is either a very 56 labour intensive and cumbersome procedure or, halve way automated, 57 would demand expensive investment in machinery.
58 The Edge Protector according to this invention will eliminate the 59 necessity of grinding the blade edges.
60 As to point 2.
61 Sharp leading edges on the blades cause micro turbulences which 62 substantially decrease the aerodynamic efficiency of said turbine 63 concept. So far, to decrease this negative effect, the blade edges have 64 to be ground for deburring, or even better, rounding, which is labour 65 intensive and cumbersome. An investment in a semi ¨ automated 66 grinding process has not been considered because of the high costs.
67 The Edge Protector according to this invention eliminates the necessity 68 of grinding the edges.
69 As to point 3.
70 The power output of a wind turbine calculates as product of wind 71 speed (to the power of 3) times the swept area. Thus, increasing the 72 swept area without altering any other substantial parameter of the 73 wind turbine related to this invention is very desirable.
74 The Edge Protector according to this invention provides for this extra 75 bonus.
76 As to point 4.
77 The casualties amongst birds and bats caused by the now prevailing 78 horizontal axis wind turbines with three blades are well known and 79 documented. Although the subject Vertical Axis Wind Turbine presents 80 a solid object in the landscape into which to fly a bird must be blind, to 81 decrease the damage done to a flying animal upon impact is very 82 desirable, and would certainly qualify the resistance of wild life activists 84 against wind turbines. So, the Edge Protector has to be as soft as 85 possible while not compromising other technical requirements, i.e. the 86 mechanical strength necessary to withstand the stress exerted on the 87 Edge Protector by the impact of the wind force.
88 The Edge Protector according to this invention would substantially 89 contribute to the acceptance of the subject wind turbine.
91 Brief Description of Drawings 92 Since Figures of the previous Canadian Patent 2,546,750 are made use 93 of with this application, their reference numbers for items/parts are 94 used as they are. For distinction, the reference numbers for new items/parts in this application are shown within brackets, for instance 96 (1) which is actually the only new one, representing the Edge Protector.
97 Thus, FIG. 1 shows a cross section or top view of the Edge Protector (1) 98 attached to one rotor blade 15. The figure is not to scale for the sake of 99 better clarity.
loo FIG. 2 shows a top view of the previous patent with only one Edge 101 Protector (1) attached to one blade 15 of each rotor 11. This FIG. 2 102 shows also, that the deflector flaps 18 will have to be shortened in 103 order to create the greater daylight for the Edge Protectors to clear said 104 deflector flaps, as shown as (3) in FIG. 2, only on the right rotor 11.
This los would be the only none substantial modification to said turbine.
106 Also, FIG. 2 shows that the swept area will be larger by the Edge 107 Protectors' (1) extension beyond the rotor radius without the necessity 108 to change any other substantial parameter of the turbine according 109 Canadian Patent 2,546,750.
112 FIG. 3 shows a front view of the rotor assembly with one Edge Protector 113 (1) attached to and running down the whole length of one blade 15.
114 Again, the depictions are not to scale for better clarity.
116 Preferred Method for the Production of the Edge Protector 117 The preferred production method is extrusion of any suitable plastic 118 material i.e. PVC, ABS or Polyurethane. Suitable means the material has 119 to have properties satisfying the prerequisites as stated in the second 120 last paragraph in the Abstract and in point 4. in the Disclosure of 121 Invention. Additionally, the chosen material must be weather proof, 122 tolerating fluctuations in temperature, air humidity and ultraviolet 123 radiation. And it has to withstand the mechanic stress exerted by the 124 wind power on the blades. If the service life of the wind turbine is 125 longer than that of the Edge Protector, riveting to the blades would be 126 the method of choice for attaching the Edge Protectors to the blades.
127 The extrusion process is continuous and there are two ways of 128 transporting the Edge Protector to the site of application: in quasi 129 endless roll, not totally endless of course, rather rolled up to diameters 130 allowed for by traffic regulations, for the purpose of whole sale without 131 knowing the size if the wind turbine or the length of the rotor blades, 132 whereby the Edge Protector can be cut to size by hack saw or power 133 circular saw. For orders where the turbine sizes respectively the blade 134 lengths are known, the Edge Protector can be cut to length 135 automatically by means of parallel travelling and returning power 136 circular saw length the out feed lane of the extruder. The cut-off pieces 137 can be automatically packaged in any preprogrammed numbers, shrink 138 rapped or protected otherwise for transportation.
141 In the case of the construction of large wind farms it may be 142 economical to have an extrusion plant put on a flatbed trailer stationed 143 at the farm site for producing the Edge Protector right on the spot.
145 Clarification 146 In the disclosure of the invention the term "leading edge" is used, 147 which needs a definition or an explanation.
148 FIG. 2 shows two circular arrows (2) which indicate the rotors' spinning 149 directions: the left rotor spins clockwise, the right rotor spins counter 150 clockwise. Looked at it without any other defining consideration, the 151 leading edge would be the inside edge of the blade. But looking at the 152 pertinent aerodynamics, the leading edge of the blade is the one 153 ending on the circumference of the rotor, because the flowing air hits 154 this outer edge first.
156 Claims 157 1. An Edge Protector as a substantial improvement to the qualities 158 of a Twin Rotor Vertical Axis Wind Turbine according to the 159 Canadian Patent 2,546,750, with four points of improvements as 160 described in the abstract and disclosure of this application; with 161 the Edge Protector shaped like an airfoil similar to modern air 162 craft wings.
163 2. An Edge Protector, according to claim 1. produced by continuous 164 extrusion.
165 3. Said Edge Protector, according to claims 1 & 2, made of plastic 166 material available on the commercial plastic material market, i.e.
167 PVC, ABS and Polyurethane or any other material suitable to 168 production by plastic extrusion.
Claims (4)
1. An Edge Protector as a substantial improvement to the qualities of a Twin Rotor Vertical Axis Wind Turbine according to the Canadian Patent 2,546,750, with four points of improvements as described in the abstract and disclosure of this application; with the Edge Protector shaped like an airfoil similar to modern air craft wings.
2. An Edge Protector, according to claim 1. produced by continuous extrusion.
3. Said Edge Protector, according to claims 1 & 2, made of plastic material available on the commercial plastic material market, i.e.
PVC, ABS and Polyurethane or any other material suitable to production by plastic extrusion.
PVC, ABS and Polyurethane or any other material suitable to production by plastic extrusion.
4. Said Edge Protector, according to claim 3, made of plastic materials of sufficiently flexible application to provide for the properties required for the somewhat competing demands between durability and softness as mentioned in point 4. In the Disclosure of Invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2961243A CA2961243A1 (en) | 2017-05-10 | 2017-05-10 | Vertical axis wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2961243A CA2961243A1 (en) | 2017-05-10 | 2017-05-10 | Vertical axis wind turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2961243A1 true CA2961243A1 (en) | 2017-10-16 |
Family
ID=60084187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2961243A Abandoned CA2961243A1 (en) | 2017-05-10 | 2017-05-10 | Vertical axis wind turbine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2961243A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3736439A1 (en) * | 2019-05-09 | 2020-11-11 | Hans-Armin Ohlmann | Edge protectors |
-
2017
- 2017-05-10 CA CA2961243A patent/CA2961243A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3736439A1 (en) * | 2019-05-09 | 2020-11-11 | Hans-Armin Ohlmann | Edge protectors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20191206 |