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flc1
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Posted: 10 November 2017 at 11:27pm | IP Logged Quote flc1

A Storm is rolling through at the moment with gusts here over 80kmh,
Turbine has put out over 2.5kw peak now. the single stator high voltage inverter maxed out at just over 1kw before turbine maxed out, should have got the 1.5 kw model for that stator.
I would be getting close to 3kw if I had the 1.5kw high voltage model. Can not say enough about how good these blades are,when a big gust comes through the turbines blades sound like a turbo prop planes blades winding up at an airport lol,

Output for the last day is 8 kwh.




Edited by flc1 on 11 November 2017 at 4:36am



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fillm
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Posted: 14 November 2017 at 12:43am | IP Logged Quote fillm

Hi Flic,

Yep any other type of blades left way, way behind the GOE in all winds, anyone who believes that Tapered Twisted blades are a requirement or that could outperform the GOE 222 on any turbine under 5kw is mistaken. I would gladly eat my hat if proven otherwise. I constantly get emails back from customers that have bought and fitted my GOE Blades to an existing turbine and it is always the same 'WOW unbelievable." or Can not believe the difference! and if we supply a fully set up balanced blade set then it " Runs so Smooth " . On a 5kw Huaya in WA we supplied a full Variable Pitch Replacement Set @ 4.6 mtr Dia, the feed back from the customer was " in the wind speed that the original F/glass Twist/ Taper set @ 5.8mtr Dia were just starting to turn the OZ Wind Set were up and producing 250W to 500W" .

I would not beat yourself up about loosing 1000th of and amp/hr of accumulated power in high wind and look at the big picture, but brag rights of peaks sound good but are not indicative of overall accumulated power performance. Fence palings at the correct angle will give good power in 12m/s +.

You will probably find that even at full furl with the GOE you will get 30% + power in high winds and reduces tower loads.
flc1 wrote:
Can not say enough about how good these blades are,when a big gust comes through the turbines blades sound like a turbo prop planes blades winding up at an airport lol,

Output for the last day is 8 kwh.


And if you think you have any chance of stopping those blades with fancy electrical PWM braking circuits on an F&P in high wind ... its not going to happen. I've smoked 3 Axials over the years with them and the AXFX has 10x more field strength than a F&P.
When the F&P Reaches max output torque drops away quickly as the stator saturates , output will hardly increase and its just to easy to over speed, they wont burn out but if your blade hub is not up to it its game over.

With your GTIs being able to raise the working voltage can take gives advantages with higher peak output and probably a little more accumulated power.It is my opinion given 2 identical F&P Duals with 3mtr GOEs and one wired for a GTI the other for Battery Charging there would not be a great difference in overall power production as it only comes back to how efficiently the blades extract power from the winds in a range of 3 - 8m/s.

I saw this in the early days when I was data logging an axial flux against a F&P Dual.

Its good that you are continuing the development of F&P wind turbines and taking the time to share what's happening and hope you keep contributing to the forum in the years to come.













Edited by fillm on 14 November 2017 at 12:48am


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flc1
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Posted: 15 November 2017 at 10:33am | IP Logged Quote flc1

Thanks for the comment Phill,
I have allso used tapered blades in the past and they just don't perform like these goe222 blades,
I agree that there is no stopping these blades at full power, , have to wait for gust to ease off then fully furl the the tail ,wait for rpm to drop off then switch on dumoload or whatever braking system to bring it under control .
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kitestrings
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Posted: 16 November 2017 at 3:28am | IP Logged Quote kitestrings

flc,

Sounds like you got a serious test of the thing, and 2.5 kW and 8 kWh is impressive. If we can get 3, 4, 6 kWh in a day that has reasonable winds I'm much happier than when these big blows roll thru - as they do - and your up at night wondering if you should of shut down.

I wholeheartedly agree with fillm that the accumulated power in the end is what matters. Folks often ask, "what's that thing put out?", kind of like comparing torque and hp ratings on a pick-up I guess. To me this really has little significance. I like that I can produce 500-1,500 watts in what seems to be light winds at ground level. And, I'd rather be able to say that it's been up for 8-years (ours hasn't yet) with minimal repairs, and it allows me to...have lights, water, refrigeration, television...during months when our PV does squat. I remember years ago watching a show where an "explorer" offered one of the natives money for his hammock; his response, "but where would I sleep".

I have no experience with the GOE blades, but by all accounts they sound well suited. Maybe I'll get to try them some day. I believe a twisted blade perhaps starts a bit early, but that is of no real significance.

Quote:
It is my opinion given 2 identical F&P Duals with 3mtr GOEs and one wired for a GTI the other for Battery Charging there would not be a great difference in overall power production


I'm not sure I agree with this statement phill, unless there is a well-suited diversion load. The benefit with grid-tie is that you you always have a home for those kWhs. With batteries, in a prolonged blow (or in our case where we have sun too) the batteries are soon full...okay so now we pre-heat water...but now the thermostat is satisfied...and if no ones home pretty soon we're dumping. I guess it is producing power, but there comes a point where it is just needless wear and tear.

kind regards, ~ks
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flc1
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Posted: 16 November 2017 at 11:59am | IP Logged Quote flc1

Gday KS
I agree with you about being happier with moderate winds,
I was right on the point of shutting it down with that recent big blow, I think now that I should have, like you say its better to have it last for 8 years rather than 8 months, next time It blows like that it will be shut down,

I just had to see what it would do, if I had got the hub right , the peak output and so on. because there will b a time when we are not home to shut it down and its blowing hard,it has to be able to hold together.
I think I will change one of the stators,at some stage,I might change the 3x12 pole star for a 4x9 pole star, it will cut in later but provide more power and load on the blades for mid to high rpm,help keep things under control.
The uncut high voltage stator does most of the work in low winds and cuts in around 85-90 rpm.
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flc1
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Posted: 19 November 2017 at 5:32pm | IP Logged Quote flc1

More howling winds here,Turbine getting workout again, decided to check hub, and not really suprised to find a small crack on a blade sapport strut , easily fixed.


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fillm
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Posted: 20 November 2017 at 9:37pm | IP Logged Quote fillm

kitestrings wrote:
flc,


Quote:
It is my opinion given 2 identical F&P Duals with 3mtr GOEs and one wired for a GTI the other for Battery Charging there would not be a great difference in overall power production


I'm not sure I agree with this statement phill, unless there is a well-suited diversion load. The benefit with grid-tie is that you you always have a home for those kWhs. With batteries, in a prolonged blow (or in our case where we have sun too) the batteries are soon full...okay so now we pre-heat water...but now the thermostat is satisfied...and if no ones home pretty soon we're dumping. I guess it is producing power, but there comes a point where it is just needless wear and tear.

kind regards, ~ks


Hi dave,
You have taken it as " where it " goes. My statment was rather "how it" converts wind to power in the first place and at what point its measured. My meaning was and is that given 2 F&P Duals the same wind conditions and same blades & Dia but given 2 differing scenarios to put the power grid or batts. By measuring in w/ hrs directly after rectification would take the full battery or the grid down out of the equation.
Of course the F&P Stators would need to be configured to suit for their intended specific use Grid or Battery Voltage , but at the end of the day we would see very little difference in output from the both in the light to average winds.

In 24hrs of screaming gales of above 10m/s of course the higher voltage will be in front, but in reality how often is that... In Freds case its probably more that what I get .







Edited by fillm on 20 November 2017 at 9:38pm


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