Talk:Darrieus Turbine - 2m combined

Development and documentation - Technical solutions -- Inddigital (talk) 19:06, 24 January 2023 (CET)

• Blades construction
  • Fiberglass Covered Ribs: Preferred option, the works are not complicated and the materials are accessible
  • Foam wire cutting: Discarded, later covered with fiberglass or other
  • With PVC pipes: Discarded, not streamlined
• Airfoil
  • AH93W215: Preferable option, justification raised in technical development file
• Generator type
  • DC motor: Low efficiency
  • Axial Flux Alternator: Preferred Option
  • Car alternator: Requires more speed or speed reducer
• Self start metthod
  • Combined Savonius: Preferred Option
  • Variable pitch: Medium complexity, fully mechanical, see this link
  • Magnus Effect: Requires additional power and engines
• Mast type
  • Truss tower: Made with angles, height between 2 and 3 meters, preferable option
  • Tubular pole: It is discarded, so as not to depend on other structures or get a robust tubular, scarce in some locations

-- Xtech2020_review (talk) 19:42, 24 January 2023 (CEST)

Include information about the estimated power that the equipment will have

In the Project Development section, the design power is indicated: between 500 and 1000W, to specify this better, it will be necessary to go through the manufacturing process and carry out some tests --Inddigital (talk) 02:15, 25 January 2023 (CET)

Part number 1.02 -- Xtech2020_review (talk) 19:35, 24 January 2023 (CEST)

It seems to me that this piece is somewhat critical to manufacture it in wood, this because it has some cuts and perforations that can generate stress concentrators, it may be good to evaluate its mechanical resistance and, if necessary, make it in aluminum for example

Thank you for your observation but it is a cedar wood which is quite resistant --Inddigital (talk) 02:16, 25 January 2023 (CET)

Part number C -- Xtech2020_review (talk) 19:40, 24 January 2023 (CEST)

Please, include the shape of the mold as well, it would just make an offset of the airfoil, 3 or 5 mm outwards, it is not something critical, but from this, it is easier for a manufacturer to make the mold

Ok, in a later version, I will include the silhouette you mention, in the meantime, the manufacturer can use a gramil to draw a parallel curve --Inddigital (talk) 02:17, 25 January 2023 (CET)

Part number 2.08 -- Xtech2020_review (talk) 19:53, 24 January 2023 (CEST)

When this piece goes through a turning process, it remains 1.5 mm thick at the ends. It is recommended to check its mechanical resistance and, if necessary, use a solid or thicker shaft

A resistive analysis of the structure was carried out, proving satisfactory for the stresses applied in normal use. We will soon be uploading it to the project page --Inddigital (talk) 02:18, 25 January 2023 (CET)

Part number 1.00 -- Thehunter (talk) 18:56, 25 January 2023 (CEST)

When the equipment reaches a high speed, the external blades will 'shadow' the internal blades, which can reduce efficiency in this situation

Excellent observation, the combined Darrieus-Savonius design already takes this into account, however it is a disadvantage that is justified by the fact of having a simple starting system, in fact the shadow caused to the internal blades is convenient, since in high speed, the Sabonius turbine does not provide much power to the equipment but in certain cases it slows down the movement --Inddigital (talk) 17:00, 25 January 2023 (CET)