Thank you Hakan. Did some looking at the local wind data here, Wind Energy Resource Atlas of the United States http://rredc.nrel.gov/wind/pubs/atlas/tables/C-1T.html to get some idea whats possible annually.
Anemometer Height in Meters and annual average Meters/Second Anem Annual Wind Power HT Speed Density (M) M/S Years (Watt/m2) 7.9 3.8 1949-61 87 8.5 4.3 1961-78 101 I don't understand the Wind Power Density above but if I multiply by the efficiencies in wind system design given your parameters, 87Wh x 35%turbine x 85%generator x 95%mechanical =87*0.35*0.85*0.95 = 24.6 Watts/hour per square meter. With a 0.3 m^2 swept area, 24.6 x 0.3 = 7.38 Wh with a 0.5 m^2 swept area, 24.6 x 0.5 = 12.30 Wh Does that look right ? > you wrote: > Hoagy, > > With best efficiency numbers, > at swept area 0.3 square meter > Wind speed m/s Power Watt > 5 6.5 > 10 52 > 15 175 > 20 415 > 25 811 > 30 1402 > > at swept area 0.5 square meter > Wind speed m/s Power Watt > 5 11 > 10 86 > 15 292 > 20 692 > 25 1352 > 30 2336 > > Darrieus best efficiency 0.35 > Generator best efficiency 0.85 > Mechanical best efficiency 0.95 > > This means that my suggestion is well within boundaries for a viable design > and good margins for lower efficiencies based on the small size. With the > correction of the Savonius efficiency, it will also fit in the design concept. > > Hakan Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/index.php?list=biofuel Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
