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Difference between revisions of "Selected Savonius wind turbines"

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== Objectives ==
== Objectives ==
* Collect information from projects related to Savonius rotor.
* Define the technical requirements to be evaluated in the projects.
* Collect information from projects related to the selected category.
* Present the projects with the most important information.
* Present the projects with the most important information.
* Evaluate strengths and weaknesses of each project.
* Evaluate strengths and weaknesses of each project.
* Issue a conclusion with the technical specifications of the project to be developed.
== Requirements ==
=== General ===
* The main purpose of the project to be developed is the design of the drawings and documentation related to the generation of electricity by means of Savonius type turbines.
* The equipment must be able to be used for residential electrical consumption applications such as: lighting, refrigeration, communication equipment, motors and small pumps, among others of 110V, at 50 or 60 Hz, depending on the locality.
* The materials to be used should be of low cost, particularly, the rotor blades should be manufactured with 200 liter metal drums cut in half lengthwise.
* Consideration should be given to the use of batteries to store the captured energy.
=== Equipment capacity ===
* Electrical demand to be supplied: 350 W (Lighting, air conditioning and miscellaneous of a house, [https://en.wikipedia.orgwikiDomestic_energy_consumption View source]).
* Estimated maximum power per drum: 180 W, [https://en.wikipedia.orgwikiSavonius_wind_turbine View source].
* Desired capacity of the equipment: 360 W (2 drums are used).
* Estimated speed: 190 rpm, [https://en.wikipedia.orgwikiSavonius_wind_turbine View source].
=== Construction ===
* The design should provide for proper balance in the rotary motion, by arranging two levels in the rotor, one above the other, each made of a drum and offset by 90 degrees.
* The lower level should have a ground clearance of approximately 2 meters.
* The structure of the equipment must be able to withstand the operating loads with a minimum safety margin of 2.
* The equipment must be able to include an easily accessible alternator, for which a belt and pulley drive must be considered.
* Main materials to be used:
** Structure: ASTM A36 steel with anti-corrosion coating.
** Rotor blades: Rolled steel drums.
** Drive shaft: hardened DIN C45 steel.
** Bearings.
** Pulleys.
** Belt.
** Alternator (may include current regulator for battery charge).
** Battery.
** DC-AC power inverter.
** Wiring (may vary with specific installations).


== Project 1 - How To Build mobile Savonius - Rotor eolienne ==
== Project 1 - How To Build mobile Savonius - Rotor eolienne ==
Line 40: Line 74:
| Electricity generation
| Electricity generation
|-
|-
| Rotor  
| Rotor / Swept area
| N-E
| information not available
|-
|-
| Power
| Power
| N-E
| information not available
|-
|-
| Dimensions
| Dimensions
| N-E
| information not available
|-  
|-  
! colspan="2" | Components
! colspan="2" | Components
Line 55: Line 89:
|-
|-
| Transmission
| Transmission
| N-E
| information not available
Belts and pulleys
Belts and pulleys
|-
|-
| Generator
| Generator
| N-E
| information not available
2 units
2 units
|-
|-
| Machine frame
| Machine frame
| N-E
| information not available
Mobile structure
Mobile structure
|-
|-
| Mast
| Mast
| N-E
| information not available
|-
|-
| Brake
| Brake
| N-E
| information not available
|-
|-
| Safety shutdown
| Safety shutdown
| N-E
| information not available
|-
|-
| Other components
| Other components
Line 99: Line 133:
|-
|-
! Property  
! Property  
! Evaluator  
! Evaluator
! Comments  
! Comments  
! Score
! Score
|-
|-
| rowspan="3" | Operational safety
| rowspan="3" | Operational safety
| evaluator1:
| Evaluator1:
|style="width: 45%"| In video it is not possible to see if there is an automatic shutdown in case of strong wind. Possibly via the generators. It is a very professional construction, so I assume that there is an automatic shutdown. The construction looks very stable. The additional lashings with wire ropes give additional use stiffness.
|style="width: 45%"| thehunter: In the video it is not possible to see if there is an automatic shutdown in case of strong wind. Possibly via the generators. It is a very professional construction, so I assume that there is an automatic shutdown. The construction looks very stable. The additional lashings with wire ropes give additional use stiffness.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: It appears to be a professional design, I would recommend a protective cover for the transmission and electrical system. Also the necessary signage as it is noted that its use is at ground level, where there may be foot traffic.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Durability
| rowspan="3" | Durabilityist
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: All components seem to be made of stainless steel. The structure seems adequately sized.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The selected components are durable.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Investment cost
| rowspan="3" | Investment cost
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: I assume that because of the use of stainless steel the manufacturing cost is quite high.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The materials and industrial processes observed will increase the total amount of the investment
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Supply of materials, standard and purchased components
| rowspan="3" | Supply of materials, standard and purchased components
| evaluator1:
| Evaluator1:
|style="width: 45%"| thehunter: The purchased parts, i.e. electrics, alternator, pulleys, V-belts et cetera seem to be commercially available components.
| style="text-align:center;" | 3
|-
|| Evaluator2:
|style="width: 45%"| xtech: Depending on the locality, there may be cases where stainless steel sheets may be difficult to locate.
| style="text-align:center;" | 2
|-
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
| rowspan="3" | Manufacturing processes / Manufacturing quality
|style="width: 45%"|  
| Evaluator1:
| style="text-align:center;" |  
|style="width: 45%"| thehunter: The constructor of thi sproject needs to have experience in working with stainless steel.
| style="text-align:center;" | 2
|-
|| Evaluator2:
|style="width: 45%"| xtech: Certain equipment such as sheet benders is required, product quality is very good
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Manufacturing processes
| rowspan="3" | Suitable for reverse engineering
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Yes, only some reference data is required but the images seem adequate
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Others
| rowspan="3" | Others
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: Apparently it is a very professional and sophisticated design, but also quite expensive due to the materials used.
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Ground level use reduces wind speed utilization
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Recommendations
| rowspan="3" | Recommendations
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: Consider whether stainless steel really has to be used everywhere.
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: -
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|colspan="3" style="text-align:Right;"|'''Total score:'''
|colspan="3" style="text-align:Right;"|'''Total score Evaluator1:'''
|style="text-align:center;" | ''' '''
|style="text-align:left;" | ''' 13 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator2:'''
|style="text-align:left;" | ''' 17 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator3:'''
|style="text-align:left;" | ''' '''
|-
|-
|}
|}
Line 235: Line 288:
| Electricity generation
| Electricity generation
|-
|-
| Rotor  
| Rotor / Swept area
| diameter: 1 m
| 1 m²
|-
|-
| Power
| Power
Line 242: Line 295:
|-
|-
| Dimensions
| Dimensions
| height: 1 m
| height: 1 m, diameter: 1 m
|-  
|-  
! colspan="2" | Components
! colspan="2" | Components
Line 250: Line 303:
|-
|-
| Transmission
| Transmission
| N-E
| information not available
Belts and pulleys
Belts and pulleys
|-
|-
Line 257: Line 310:
|-
|-
| Machine frame
| Machine frame
| N-E
| information not available
Mobile structure
Mobile structure
|-
|-
| Mast
| Mast
| N-E
| information not available
|-
|-
| Brake
| Brake
| N-E
| information not available
|-
|-
| Safety shutdown
| Safety shutdown
| N-E
| information not available
|-
|-
| Other components
| Other components
Line 295: Line 348:
|-
|-
! Property  
! Property  
! Evaluator  
! Evaluator
! Comments  
! Comments  
! Score
! Score
|-
|-
| rowspan="3" | Operational safety
| rowspan="3" | Operational safety
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: The developer says that the project survived one of the strongest storms ever in Germany without damage.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: I suggest a support frame so as not to depend structurally only on the axis of rotation cantilevered.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Durability
| rowspan="3" | Durabilityist
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: The materials used seem to be okay for outdoor use.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Appears to be a durable design
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Investment cost
| rowspan="3" | Investment cost
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: Iseems to be a relatively inexpensive construction.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Excellent design simplification and consequent investment reduction
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Supply of materials, standard and purchased components
| rowspan="3" | Supply of materials, standard and purchased components
| evaluator1:
| Evaluator1:
|style="width: 45%"| thehunter: Only materials or components that are easy to preserve seem to have been used here.
| style="text-align:center;" | 3
|-
|| Evaluator2:
|style="width: 45%"| xtech: They are accessible materials, the metallic sheet appears to be made of galvanized steel.
| style="text-align:center;" | 3
|-
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
| rowspan="3" | Manufacturing processes / Manufacturing quality
|style="width: 45%"|  
| Evaluator1:
| style="text-align:center;" |  
|style="width: 45%"| thehunter: It is not clear how the sheets of the rotor blades were joined. But otherwise, no expensive or sophisticated Manufacturing processes seem to have been used.
| style="text-align:center;" | 3
|-
|| Evaluator2:
|style="width: 45%"| xtech: Feasible for a DIY type process
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Manufacturing processes
| rowspan="3" | Suitable for reverse engineering
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: With the general measurements indicated and some references for the internal components, it is possible to apply reverse engineering.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Others
| rowspan="3" | Others
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: The vertical axis is attached directly to the roof structure of the house with two ball bearings. This is energetically unfavorable, because the roof creates strong turbulence in the air flow, which significantly reduces energy efficiency.to solve this problem would have to design and build a completely new rack, preferably with a height of several meters. If someone wants to mount a Savonius rotor directly on his peaked roof, then this is certainly a good solution.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: -
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Recommendations
| rowspan="3" | Recommendations
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter:
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Include some electrical protection system
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|colspan="3" style="text-align:Right;"|'''Total score:'''
|colspan="3" style="text-align:Right;"|'''Total score Evaluator1:'''
|style="text-align:center;" | ''' '''
|style="text-align:left;" | ''' 17 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator2:'''
|style="text-align:left;" | ''' 20 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator3:'''
|style="text-align:left;" | ''' '''
|-
|-
|}
|}
Line 430: Line 502:
| Pumping water
| Pumping water
|-
|-
| Rotor  
| Rotor / Swept area
| N-E
| 1.95 m² (estimated)
|-
|-
| Power
| Power
| N-E
| information not available
|-
|-
| Dimensions
| Dimensions
| N-E
| information not available
|-  
|-  
! colspan="2" | Components
! colspan="2" | Components
Line 445: Line 517:
|-
|-
| Transmission
| Transmission
| N-E
| information not available
crank-rod system
crank-rod system
|-
|-
Line 452: Line 524:
|-
|-
| Machine frame
| Machine frame
| N-E
| information not available
|-
|-
| Mast
| Mast
| N-E
| information not available
|-
|-
| Brake
| Brake
| N-E
| information not available
|-
|-
| Safety shutdown
| Safety shutdown
| N-E
| information not available
|-
|-
| Other components
| Other components
Line 487: Line 559:
|-
|-
! Property  
! Property  
! Evaluator  
! Evaluator
! Comments  
! Comments  
! Score
! Score
|-
|-
| rowspan="3" | Operational safety
| rowspan="3" | Operational safety
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter:  It is not clear from the video whether the construction also provides sufficient safety in high winds or during storms. The construction seems to be made of galvanized steel pipe and, which at first glance seem a bit thin, but this can be deceiving.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The structure appears to be stable but the profiles used could fail under unforeseen loads or fatigue, creating a risk to people.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Durability
| rowspan="3" | Durabilityist
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: by using cut out 200 l tin barrels the construction looks a bit unprofessional. However, the tin drums have good stability and insensitivity to corrosion, if properly treated. Galvanized steel pipes is quite suitable as a material for the construction. The craftsmanship is not very clean, but that does not matter for the assessment.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Metal parts should have a corrosion protection, it is also good to know the characteristics of the pump used to evaluate durability.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Investment cost
| rowspan="3" | Investment cost
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: This is clearly a very low cost design, it is probably not possible to build a Savonius wind turbine much cheaper.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Apparently the materials are mostly recycled, this greatly reduces the investment
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Supply of materials, standard and purchased components
| rowspan="3" | Supply of materials, standard and purchased components
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: All materials and components seem to be readily available.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The materials are very easy to acquire
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Manufacturing processes
| rowspan="3" | Manufacturing processes / Manufacturing quality
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: No special Manufacturing processes are used.
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The manufacturing processes are DIY or handmade, the product quality could be improved.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Others
| rowspan="3" | Suitable for reverse engineering
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: Reverse engineering is feasible
| style="text-align:center;" |  
| style="text-align:center;" | 3
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|
| style="text-align:center;" |
|-
| rowspan="3" | Recommendations
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" | -
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" | -
|-
|| evaluator3:
|style="width: 45%"|
| style="text-align:center;" | -
|-
|colspan="3" style="text-align:Right;"|'''Total score:'''
|style="text-align:center;" | ''' '''
|-
|}
 
== Project 4 - Savonius rotor self-made (in use) ==
 
{| class="wikitable" style="width: 80%"
|-
! colspan="2" | Project data
|-
| Url original
| https://www.youtube.com/watch?v=3NCPkuCk1Ts
|-
| Url on OHO
| https://en.oho.wiki/wiki/Savonius_rotor_self-made_(in_use)
|-
| Images
|
<div style="text-align: center;" ><ul>
<li style="display: inline-block; vertical-align: top;padding: 10px;">
[[File:Savonius-Rotor Eigenbau (im Einsatz) - YouTube - 0 00.jpeg|250px]] </li>
<li style="display: inline-block; vertical-align: top;padding: 10px;">
[[File:Savonius-Rotor Eigenbau (im Einsatz) - YouTube - 0 11.jpeg|250px]] </li>
</ul></div>
|-
! colspan="2" | Technical data
|-
| Category
| Renewable energies > Wind turbines > Savonius wind turbines
|-
| Subclass
| VA – vertical axis frame
|-
| Use
| Electricity generation
|-
| Rotor
| N-E
|-
| Power
| N-E
4 super bright, white LEDs are operated
|-
| Dimensions
| N-E
|-
! colspan="2" | Components
|-
| Rotor
| 2 blades - small scale
|-
| Transmission
| N-E
|-
| Generator
| N-E
|-
| Machine frame
| N-E
|-
| Mast
| N-E
|-
| Brake
| N-E
|-
| Safety shutdown
| N-E
|-
| Other components
| current limiting module (3.5 volts / 120 mA) connected upstream
|-
! colspan="2" | YouTube data
|-
| Visits / likes / don't likes
| 40.338 / 45 / 5 (2 videos)
|-
| Uploaded date
| 21.05.2009
|-
| Important comments
| Small speeds or low wind speeds are completely sufficient
|-
|}
 
 
{| class="wikitable" style="width: 80%"
|-
! colspan="4" | Evaluation
|-
! colspan="4" style="text-align: Right; font-weight: normal;"| ''Score Legend: 1-> Deficient, 2-> Regular, 3-> Ok''
|-
! Property
! Evaluator
! Comments
! Score
|-
| rowspan="3" | Operational safety
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator3:
|style="width: 45%"|
| style="text-align:center;" |
|-
| rowspan="3" | Durability
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator3:
|style="width: 45%"|
| style="text-align:center;" |
|-
| rowspan="3" | Investment cost
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator3:
|style="width: 45%"|
| style="text-align:center;" |
|-
| rowspan="3" | Supply of materials, standard and purchased components
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator3:
|style="width: 45%"|
| style="text-align:center;" |
|-
| rowspan="3" | Manufacturing processes
| evaluator1:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator2:
|style="width: 45%"|
| style="text-align:center;" |
|-
|| evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Others
| rowspan="3" | Others
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter:
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: The stroke of the long bar and the frequency of its movement must be defined, as this affects the selection of the pump if it is purchased.
| style="text-align:center;" |  
| style="text-align:center;" | 2
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" |  
| style="text-align:center;" |  
|-
|-
| rowspan="3" | Recommendations
| rowspan="3" | Recommendations
| evaluator1:
| Evaluator1:
|style="width: 45%"|  
|style="width: 45%"| thehunter: buy some weatherproof metal paint for the halved trash barrels, and the project looks much better right away
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator2:
|| Evaluator2:
|style="width: 45%"|  
|style="width: 45%"| xtech: It is a project made for ornamental purposes, adjustments can be made to develop it for water supply purposes, this could include a reserve tank above
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|| evaluator3:
|| Evaluator3:
|style="width: 45%"|  
|style="width: 45%"|  
| style="text-align:center;" | -
| style="text-align:center;" | -
|-
|-
|colspan="3" style="text-align:Right;"|'''Total score:'''
|colspan="3" style="text-align:Right;"|'''Total score Evaluator1:'''
|style="text-align:center;" | ''' '''
|style="text-align:left;" | ''' 13 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator2:'''
|style="text-align:left;" | ''' 17 '''
|-
|colspan="3" style="text-align:Right;"|'''Total score Evaluator3:'''
|style="text-align:left;" | ''' '''
|-
|-
|}
|}
Line 780: Line 682:
|-
|-
!  
!  
! style="width: 22%" | Project 1
! style="width: 30%" | Project 1
! style="width: 22%" |Project 2
! style="width: 30%" |Project 2
! style="width: 22%" |Project 3
! style="width: 30%" |Project 3
! style="width: 22%" |Project 4
|-
|-
| Title
| Title
Line 789: Line 690:
| Savonius - rotor self-made
| Savonius - rotor self-made
| Savonius Rotor (Homemade) - Water Pump Application
| Savonius Rotor (Homemade) - Water Pump Application
| Savonius rotor self-made (in use)
|-
|-
| Url
| Url
Line 796: Line 696:
|  https://www.youtube.com/watch?v=_G4wcEOAtFA <br>
|  https://www.youtube.com/watch?v=_G4wcEOAtFA <br>
https://www.youtube.com/watch?v=QU046KNtpLE  
https://www.youtube.com/watch?v=QU046KNtpLE  
| https://www.youtube.com/watch?v=3NCPkuCk1Ts
|-
|-
| OHO url
| OHO url
Line 802: Line 701:
| https://en.oho.wiki/wiki/Savonius_-_rotor_self-made
| https://en.oho.wiki/wiki/Savonius_-_rotor_self-made
| https://en.oho.wiki/wiki/Savonius_Rotor_(Homemade)_-_Water_Pump_Application_-_Part_1_-_Feng_Shui
| https://en.oho.wiki/wiki/Savonius_Rotor_(Homemade)_-_Water_Pump_Application_-_Part_1_-_Feng_Shui
| https://en.oho.wiki/wiki/Savonius_rotor_self-made_(in_use)
|-
|-
| Use
| Use
| Electricity generation  
|style="text-align:center;" | Electricity generation  
| Electricity generation  
|style="text-align:center;" | Electricity generation  
| Water Pumping
|style="text-align:center;" | Water Pumping
| Electricity generation
|-
| Swept area
|style="text-align:center;" | -
|style="text-align:center;" | 1 m²
|style="text-align:center;" | ~1.95 m²
|-
| Manufacturing quality
|style="text-align:center;" | Ok
|style="text-align:center;" | Ok
|style="text-align:center;" | Regular
|-
|-
| Recomendations
| Recomendations
| -
| Evaluate use of stainless steel or other material
| -
| Include electrical protection system
| -
| Use coating on barrels, formulate project for water supply
| -
|-
|-
| Total score
| Total score
|style="text-align:center;" | -
|style="text-align:center;" | 15
|style="text-align:center;" | -
|style="text-align:center;" | 18.5
|style="text-align:center;" | -
|style="text-align:center;" | 15
|style="text-align:center;" | -
|}
|}

Latest revision as of 03:49, 23 April 2021

Objectives

  • Define the technical requirements to be evaluated in the projects.
  • Collect information from projects related to the selected category.
  • Present the projects with the most important information.
  • Evaluate strengths and weaknesses of each project.
  • Issue a conclusion with the technical specifications of the project to be developed.

Requirements

General

  • The main purpose of the project to be developed is the design of the drawings and documentation related to the generation of electricity by means of Savonius type turbines.
  • The equipment must be able to be used for residential electrical consumption applications such as: lighting, refrigeration, communication equipment, motors and small pumps, among others of 110V, at 50 or 60 Hz, depending on the locality.
  • The materials to be used should be of low cost, particularly, the rotor blades should be manufactured with 200 liter metal drums cut in half lengthwise.
  • Consideration should be given to the use of batteries to store the captured energy.

Equipment capacity

  • Electrical demand to be supplied: 350 W (Lighting, air conditioning and miscellaneous of a house, View source).
  • Estimated maximum power per drum: 180 W, View source.
  • Desired capacity of the equipment: 360 W (2 drums are used).
  • Estimated speed: 190 rpm, View source.

Construction

  • The design should provide for proper balance in the rotary motion, by arranging two levels in the rotor, one above the other, each made of a drum and offset by 90 degrees.
  • The lower level should have a ground clearance of approximately 2 meters.
  • The structure of the equipment must be able to withstand the operating loads with a minimum safety margin of 2.
  • The equipment must be able to include an easily accessible alternator, for which a belt and pulley drive must be considered.
  • Main materials to be used:
    • Structure: ASTM A36 steel with anti-corrosion coating.
    • Rotor blades: Rolled steel drums.
    • Drive shaft: hardened DIN C45 steel.
    • Bearings.
    • Pulleys.
    • Belt.
    • Alternator (may include current regulator for battery charge).
    • Battery.
    • DC-AC power inverter.
    • Wiring (may vary with specific installations).


Project 1 - How To Build mobile Savonius - Rotor eolienne

Project data
Url original https://www.youtube.com/watch?v=L3HDEkuIDYc
Url on OHO https://en.oho.wiki/wiki/How_To_Build_mobile_Savonius_-_Rotor_eolienne_2
Images
  • How To Build mobile Savonius - Rotor eolienne - YouTube - 0 11.jpeg
  • How To Build mobile Savonius - Rotor eolienne - YouTube - 0 21.jpeg
  • How To Build mobile Savonius - Rotor eolienne - YouTube - 0 59.jpeg
  • How To Build mobile Savonius - Rotor eolienne - YouTube - 2 11.jpeg
Technical data
Category Renewable energies > Wind turbines > Savonius wind turbines
Subclass VA – vertical axis frame
Use Electricity generation
Rotor / Swept area information not available
Power information not available
Dimensions information not available
Components
Rotor 8 blades
Transmission information not available

Belts and pulleys

Generator information not available

2 units

Machine frame information not available

Mobile structure

Mast information not available
Brake information not available
Safety shutdown information not available
Other components Rear suspension, tension cables, trailer anchor, board and electrical wiring
YouTube data
Visits / likes / don't likes 8180 / 42 / 2
Uploaded date 12.10.2014
Important comments -


Evaluation
Score Legend: 1-> Deficient, 2-> Regular, 3-> Ok
Property Evaluator Comments Score
Operational safety Evaluator1: thehunter: In the video it is not possible to see if there is an automatic shutdown in case of strong wind. Possibly via the generators. It is a very professional construction, so I assume that there is an automatic shutdown. The construction looks very stable. The additional lashings with wire ropes give additional use stiffness. 3
Evaluator2: xtech: It appears to be a professional design, I would recommend a protective cover for the transmission and electrical system. Also the necessary signage as it is noted that its use is at ground level, where there may be foot traffic. 3
Evaluator3:
Durabilityist Evaluator1: thehunter: All components seem to be made of stainless steel. The structure seems adequately sized. 3
Evaluator2: xtech: The selected components are durable. 3
Evaluator3:
Investment cost Evaluator1: thehunter: I assume that because of the use of stainless steel the manufacturing cost is quite high. 2
Evaluator2: xtech: The materials and industrial processes observed will increase the total amount of the investment 2
Evaluator3:
Supply of materials, standard and purchased components Evaluator1: thehunter: The purchased parts, i.e. electrics, alternator, pulleys, V-belts et cetera seem to be commercially available components. 3
Evaluator2: xtech: Depending on the locality, there may be cases where stainless steel sheets may be difficult to locate. 2
Evaluator3:
Manufacturing processes / Manufacturing quality Evaluator1: thehunter: The constructor of thi sproject needs to have experience in working with stainless steel. 2
Evaluator2: xtech: Certain equipment such as sheet benders is required, product quality is very good 2
Evaluator3:
Suitable for reverse engineering Evaluator1:
Evaluator2: xtech: Yes, only some reference data is required but the images seem adequate 3
Evaluator3:
Others Evaluator1: thehunter: Apparently it is a very professional and sophisticated design, but also quite expensive due to the materials used.
Evaluator2: xtech: Ground level use reduces wind speed utilization 2
Evaluator3:
Recommendations Evaluator1: thehunter: Consider whether stainless steel really has to be used everywhere. -
Evaluator2: xtech: - -
Evaluator3: -
Total score Evaluator1: 13
Total score Evaluator2: 17
Total score Evaluator3:

Project 2 - Savonius - rotor self-made

Project data
Url original https://www.youtube.com/watch?v=rt1aRkNBBtE
Url on OHO https://en.oho.wiki/wiki/Savonius_-_rotor_self-made
Images
  • Savonius - Rotor eigenbau - YouTube - 0 30.jpeg
  • Savonius - Rotor eigenbau - YouTube - 0 16.jpeg
  • Savonius - Rotor eigenbau - YouTube - 0 41.jpeg
  • Savonius - Rotor eigenbau - YouTube - 0 54.jpeg
Technical data
Category Renewable energies > Wind turbines > Savonius wind turbines
Subclass VA – vertical axis frame
Use Electricity generation
Rotor / Swept area 1 m²
Power 200 Watt max
Dimensions height: 1 m, diameter: 1 m
Components
Rotor 3 blades
Transmission information not available

Belts and pulleys

Generator was an 80 volt permanent magnet DC motor
Machine frame information not available

Mobile structure

Mast information not available
Brake information not available
Safety shutdown information not available
Other components Legs, shaft, bearings
YouTube data
Visits / likes / don't likes 142.377 / 61 / 5
Uploaded date 17.02.2008
Important comments A hub motor from an e-bike would work better because you don't have to translate it so much.

The powered generator stores its energy in lead gel batteries and is then used for lighting etc when needed.
It is particularly storm-proof and very suitable for weak winds


Evaluation
Score Legend: 1-> Deficient, 2-> Regular, 3-> Ok
Property Evaluator Comments Score
Operational safety Evaluator1: thehunter: The developer says that the project survived one of the strongest storms ever in Germany without damage. 3
Evaluator2: xtech: I suggest a support frame so as not to depend structurally only on the axis of rotation cantilevered. 2
Evaluator3:
Durabilityist Evaluator1: thehunter: The materials used seem to be okay for outdoor use. 3
Evaluator2: xtech: Appears to be a durable design 3
Evaluator3:
Investment cost Evaluator1: thehunter: Iseems to be a relatively inexpensive construction. 3
Evaluator2: xtech: Excellent design simplification and consequent investment reduction 3
Evaluator3:
Supply of materials, standard and purchased components Evaluator1: thehunter: Only materials or components that are easy to preserve seem to have been used here. 3
Evaluator2: xtech: They are accessible materials, the metallic sheet appears to be made of galvanized steel. 3
Evaluator3:
Manufacturing processes / Manufacturing quality Evaluator1: thehunter: It is not clear how the sheets of the rotor blades were joined. But otherwise, no expensive or sophisticated Manufacturing processes seem to have been used. 3
Evaluator2: xtech: Feasible for a DIY type process 3
Evaluator3:
Suitable for reverse engineering Evaluator1:
Evaluator2: xtech: With the general measurements indicated and some references for the internal components, it is possible to apply reverse engineering. 3
Evaluator3:
Others Evaluator1: thehunter: The vertical axis is attached directly to the roof structure of the house with two ball bearings. This is energetically unfavorable, because the roof creates strong turbulence in the air flow, which significantly reduces energy efficiency.to solve this problem would have to design and build a completely new rack, preferably with a height of several meters. If someone wants to mount a Savonius rotor directly on his peaked roof, then this is certainly a good solution. 2
Evaluator2: xtech: - 3
Evaluator3:
Recommendations Evaluator1: thehunter: -
Evaluator2: xtech: Include some electrical protection system -
Evaluator3: -
Total score Evaluator1: 17
Total score Evaluator2: 20
Total score Evaluator3:

Project 3 - Savonius Rotor (Homemade) - Water Pump Application

Project data
Url original https://www.youtube.com/watch?v=_G4wcEOAtFA

https://www.youtube.com/watch?v=QU046KNtpLE

Url on OHO https://en.oho.wiki/wiki/Savonius_Rotor_(Homemade)_-_Water_Pump_Application_-_Part_1_-_Feng_Shui
Images
  • Rotor Savonius (Casero) - Aplicacion Bomba Agua - Parte 2 - Feng Shui - YouTube - 0 02.jpeg
  • Rotor Savonius (Casero) - Aplicacion Bomba Agua - Parte 2 - Feng Shui - YouTube - 0 10.jpeg
  • Rotor Savonius (Casero) - Aplicacion Bomba Agua - Parte 2 - Feng Shui - YouTube - 0 30.jpeg
Technical data
Category Renewable energies > Wind turbines > Savonius wind turbines
Subclass VA – vertical axis frame
Use Pumping water
Rotor / Swept area 1.95 m² (estimated)
Power information not available
Dimensions information not available
Components
Rotor 4 blades
Transmission information not available

crank-rod system

Pump Piston water pump
Machine frame information not available
Mast information not available
Brake information not available
Safety shutdown information not available
Other components Tension cables, long piston rod
YouTube data
Visits / likes / don't likes 5880 / 24 / 0 (2 videos)
Uploaded date 17.04.2013
Important comments homemade construction, with recycled materials.


Evaluation
Score Legend: 1-> Deficient, 2-> Regular, 3-> Ok
Property Evaluator Comments Score
Operational safety Evaluator1: thehunter: It is not clear from the video whether the construction also provides sufficient safety in high winds or during storms. The construction seems to be made of galvanized steel pipe and, which at first glance seem a bit thin, but this can be deceiving. 2
Evaluator2: xtech: The structure appears to be stable but the profiles used could fail under unforeseen loads or fatigue, creating a risk to people. 2
Evaluator3:
Durabilityist Evaluator1: thehunter: by using cut out 200 l tin barrels the construction looks a bit unprofessional. However, the tin drums have good stability and insensitivity to corrosion, if properly treated. Galvanized steel pipes is quite suitable as a material for the construction. The craftsmanship is not very clean, but that does not matter for the assessment. 2
Evaluator2: xtech: Metal parts should have a corrosion protection, it is also good to know the characteristics of the pump used to evaluate durability. 2
Evaluator3:
Investment cost Evaluator1: thehunter: This is clearly a very low cost design, it is probably not possible to build a Savonius wind turbine much cheaper. 3
Evaluator2: xtech: Apparently the materials are mostly recycled, this greatly reduces the investment 3
Evaluator3:
Supply of materials, standard and purchased components Evaluator1: thehunter: All materials and components seem to be readily available. 3
Evaluator2: xtech: The materials are very easy to acquire 3
Evaluator3:
Manufacturing processes / Manufacturing quality Evaluator1: thehunter: No special Manufacturing processes are used. 3
Evaluator2: xtech: The manufacturing processes are DIY or handmade, the product quality could be improved. 2
Evaluator3:
Suitable for reverse engineering Evaluator1:
Evaluator2: xtech: Reverse engineering is feasible 3
Evaluator3:
Others Evaluator1: thehunter:
Evaluator2: xtech: The stroke of the long bar and the frequency of its movement must be defined, as this affects the selection of the pump if it is purchased. 2
Evaluator3:
Recommendations Evaluator1: thehunter: buy some weatherproof metal paint for the halved trash barrels, and the project looks much better right away -
Evaluator2: xtech: It is a project made for ornamental purposes, adjustments can be made to develop it for water supply purposes, this could include a reserve tank above -
Evaluator3: -
Total score Evaluator1: 13
Total score Evaluator2: 17
Total score Evaluator3:

Summary

Project 1 Project 2 Project 3
Title How To Build mobile Savonius - Rotor eolienne Savonius - rotor self-made Savonius Rotor (Homemade) - Water Pump Application
Url https://www.youtube.com/watch?v=L3HDEkuIDYc https://www.youtube.com/watch?v=rt1aRkNBBtE https://www.youtube.com/watch?v=_G4wcEOAtFA

https://www.youtube.com/watch?v=QU046KNtpLE

OHO url https://en.oho.wiki/wiki/How_To_Build_mobile_Savonius_-_Rotor_eolienne_2 https://en.oho.wiki/wiki/Savonius_-_rotor_self-made https://en.oho.wiki/wiki/Savonius_Rotor_(Homemade)_-_Water_Pump_Application_-_Part_1_-_Feng_Shui
Use Electricity generation Electricity generation Water Pumping
Swept area - 1 m² ~1.95 m²
Manufacturing quality Ok Ok Regular
Recomendations Evaluate use of stainless steel or other material Include electrical protection system Use coating on barrels, formulate project for water supply
Total score 15 18.5 15
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