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Forum Index : Windmills : FP wind turbine commercially made in NZ
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Bergen Newbie  Joined: 19/02/2008 Location: AustraliaPosts: 19 |
Hi guys, not sure if yous seen this. Its availiable at a lot of the RE shops in NZ. http://www.thebatteryclinic.co.nz/WindRB900.html James Wind powers my house |
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KarlJ Guru  Joined: 19/05/2008 Location: AustraliaPosts: 1178 |
I hadnt seen that sucker. I do note that in 4.5m/s it makes 80W thats about 1.5A @52V The Phillm Machine, with furling @3m diameter makes pretty much double that I'm seeing 3-4A in the same wind. I get the same 80W in just 3.5m/s 
and 50W in just 2.2m/s 
900W @14m/s is fairly howling for windspeed too, compared to the 1KW at 9-10m/s out of the Phillm dual. Cost looks prohibitive at $3500. Phills all up with blades, ready to roll with stators, and install on the pole with CAP voltage doubler is basically half that. (and if you build some bits yourself like the voltage doubler and supply the F&P's -much less again). 
I do like the shiny appearance but I need more details on stators supplied to believe the output. Gordon has only ever seen 890W out of the 100S in Delta and for this turbine to run in delta without a voltage doubler or MPPT type of thing would have a very high cutin rpm making it not suitable for low wind sites. Go Aussie! Kicking those NZ butts! 
Luck favours the well prepared |
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Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Limiting the rotors to 2000 rpm sounds a little scary to me. It would appear to only be running 1 stator from what i could see. If that is the case than the output is not so bad. Rather tidy looking mill over all. Pete. Ps- Karl you are a little bias  Sometimes it just works |
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vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Maybe these are the keys: - "The distinctive looking nose cone increases stability and efficiency of the machine by as much as 20%." - "Through extensive testing in field tests and wind tunnel testing the optimal of 2.0 meters was determined." - "Specially designed tips on the propeller of the RB900" Vasi ---------------------- [quote]Like many other inventors he was taken to the Fisher and Paykel direct drive brushless motors. Working together with the designers in Fisher and Paykel he has been able to modify the unit for maximum power production. His expertise in propellor design resulted in the five bladed unit on our RB900. The design holds the RPM constant in high winds due to the unique propellor design. [/quote] Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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GWatPE Senior Member  Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
The article mentions only 2 bearings to wear out, yet there is mention of a variable pitch design?? If you don't have any furling mechanism, then the machine has to be able to survive. I suspect that the power limit they see is just reactance limiting of the F&P design. A few things don't add up in the equations re power output v windspeed. The low cutin, and the high power don't usually work together without a DC-DC converter somewhere. If the variable pitch gave higher proportional rpm at low power, and reduced the rpm proportional to windspeed, as the power increased, then this may expand the range, and give the high power quoted from about 1000RPM. The most RPM I have recorded from my Lakota blades was 1200, and this was scary fast, so 2000rpm is out there further. Gordon. become more energy aware |
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| neil0mac Senior Member Joined: 26/12/2009 Location: AustraliaPosts: 210 |
I am mystified why round pipe is used. I would have thought that a 75 x 50 RHS tube would be stronger and less affected by wind (particularly with a 50MM semi-circular piece of plastic pipe screwed to the front edge. |
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| Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Neil, [quote] (particularly with a 50MM semi-circular piece of plastic pipe screwed to the front edge. [/quote] And what front edge would that be, the one at the back to front , side to front or front to front, if a wind mill rotates 360 degrees then there is many fronts. You lost me. As for profile strength round or triangular are the 2 strongest profiles for loadings in all directions. I think you have viewed it as a still shot and not a variable position machine. Pete. Sometimes it just works |
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| neil0mac Senior Member Joined: 26/12/2009 Location: AustraliaPosts: 210 |
Umm. True.  |
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| KarlJ Guru Joined: 19/05/2008 Location: AustraliaPosts: 1178 |
2000rpm!!! Holy sh*t thats really humming. I'll take 2 stators and 750rpm thanks! Luck favours the well prepared |
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
Hi Karl, actually 400RPM for the 1000W is even better. Gordon. become more energy aware |
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| KarlJ Guru Joined: 19/05/2008 Location: AustraliaPosts: 1178 |
Indeed 
dont think the dual would do that either! time to talk AXFX again! 
I have spent lots of time looking at various designs, including the super-expensive VAWT's and sykstreams all of which Phill and yourself can beat hands down for a fraction of the price, not to mention OZ who seems to be able to turn a tree, couple of bits of scrap pipe, some degaussing coils, microwave parts etc to crack out (and dont forget the $5-700 in neo's) 5KW+ You guys are the go! Luck favours the well prepared |
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| dwyer Guru Joined: 19/09/2005 Location: AustraliaPosts: 574 |
Hi Everyone i do agree with Karl' comment and l would'nt spend this kind of dollar as l nearly fell of chair as cost to buy is too Bl**dy expenives
dwyer the bushman |
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| GWatPE Senior Member Joined: 01/09/2006 Location: AustraliaPosts: 2127 |
I don't know where you get this figure from. Maybe if you get them 1 at a time. Gordon. become more energy aware |
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| KarlJ Guru Joined: 19/05/2008 Location: AustraliaPosts: 1178 |
where from Gordon? everywhere I look they are $20+ each even in lots of 24. I'd like to have a crack at the otherpower type AXFX just as there is plenty of instructions and looks easier than the enclosed design you use. OZ makes it sound really easy and i guess it is after the first one.... Luck favours the well prepared |
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oztules Guru Joined: 26/07/2007 Location: AustraliaPosts: 1686 |
Otherpower has plenty of hands on stuff. Use the 50mm rounds... not the square ones they used for a while... you'll burn a stator up with those with anything over 8 feet. I bought my first hundred mags for $13 each 6 years ago. 50x12.5 N45.... Gordon's design is very flash there is no doubt. But providing you spend some money on the epoxy to do the magnets properly, then the open design is probably superior in all but looks..... especially if you want to chase the big figures. They seem to weather the American winters with no problems.... so they must stand up to anything from the pics I have seen from Colorado etc. and the tropics in Samoa. My unit probably owes me 400 bucks. My second unit about the same. Over here that means just too much power for 1 battery pack of only 220ah. I can only run one at a time in normal weather, but can switch in both in very light winds (still hit 20a in little gusts even then). Think of this. The only cheap part of the F@P units .. is the F@P. The infrastructure needed costs the same. That being the case... I prefer to use that infrastructure on a better mill head..... thats how I look at it anyway..... It is also nice to design it how you want it.... instead of trying to design around an alternator that does not suit your power needs or blade size/rpm/current requirements. .......oztules Ps. It's no secret that my tower is err inexpensive to say the least..... but one day I will put up the 12m ones..... Village idiot...or... just another hack out of his depth |
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