Report KD 664 about VIRYA-1.8W rotor available

[Adriaan Kragten]

Report KD 664 can be copied for free from my website: www.kdwindturbines.nl at the menu KD-reports. The title of this report is: "Calculations executed for the 2-bladed rotor of the VIRYA-1.8W windmill (lambda design = 6.25, wooden blades) used in combination with an 8-pole permanent magnet generator frame size 71 with a stator with no iron in the coils".

This rotor is meant to be used in combination with the PM-generator which is described in public report KD 644. The VIRYA-1.8W can be used in combination with the tower and head of the VIRYA-1.8. Fotos of the drawings of these tower and head are given in the manual part 2 of the VIRYA-1.81 which is given at the bottom of the list with KD-reports.

KD 664 contains detailed drawings of the rotor and the hub in the appendix. To give an impression, I have copied drawing 1801-01 in the attachment.

[Gary]

I saw the 1.8W and assumed a tiny unit of 1.8 Watts.
A more descriptive name would be helpful.
Looks like an excellent contribution.

Thank you,
Gary

[Adriaan Kragten]

All my wind turbines have as name VIRYA (which means energy in Sanskrit) followed by the rotor diameter in m. However, the VIRYA-1.8 with three stainless steel blades already existed and so I have added a W because this new rotor has two wooden blades. The W has nothing to do with the maximum power which can be generated and which is about 230 W at V = 11 m/s (see figure 5 KD 664). But it would be good if someone builds the generator and tests if it has about the Pmech-n and Pel-n curves which I have estimated in figure 4 of KD 664.