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gpalterpower
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Posted: 25 August 2018 at 10:14am | IP Logged Quote gpalterpower

Hey Barky,
How's the build progressing? How you going with those photos there! Im interested in seeing some more pics and how it all goes together.
Marcus

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BarkyJ
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Posted: 25 August 2018 at 4:23pm | IP Logged Quote BarkyJ

Hi Marcus

Sorry for the delay on the pictures, I have been overseas for work, and just returned in the early hours this morning.

The build is going well.
I got the blades on and tested in light winds, and was just testing all the direction logic for the turret control, auto/manual, park, etc etc.

Had a few issues with the turret motor and the wind turning the turret, so have changed to a worm driven motor now, and in the process of mounting that up.

My concerns so far is that my blades are only going to work in quite strong wind, and in the last month or so, we have only had light winds, up to about 5m/s peaks. So really the windmill is spinning and things are working, but its not generating any power. But it does seem to be following the designed spec, as we are not generating any real power until about 5m/s up to 10m/s, but I am just worried that I am never going to see that sort of wind, other than if a storm front comes over.
I have noticed that in moderate wind, the blades start to make noise, but in light wind they are silent. So they must be dragging to some degree, so that is another challenge to sort out.

So I'm not 100% sure what to do now, but I will continue on as is and see what Spring brings, as it might just be the time of the year.

Still got a bit of work to do before I can leave it up for a period of time but making good progress.

Regarding the photos, I will try to get these done tomorrow. Really sorry for the delay.

Cheers
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BarkyJ
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Posted: 02 October 2018 at 10:23am | IP Logged Quote BarkyJ

My apologies for a decent absence.
I was called overseas for work, and so life's projects ground to a halt.

I have had a bit of a play and looked at all the wind data I have, and really I am getting winds averaging 3-5m/s, and only get a peak of 10m/s in a blue moon.

The blades spin, power gets generated, but only briefly. I am never in a generating position for very long, so something needs to change.

Do I need more blades?

The turret positioning is working. I stay pointing into the wind, but the wind is often too weak, fizzles to 2m/s then comes up to 5m/s and back down again.

This setup was structured around 5m/s as being the start and going up to 10m/s, but I am seldom over the 5m/s mark for very long it seems.

Input welcome.

Right now the wind is about 3m/s, peaking up to 5m/s and dropping as low as 2m/s, so the generator is barely engaging any load, and my test hot water/element remains cold. Its doing nothing essentially.

Here is a few quick videos for some show-and-tell. Please give honest feedback, recommendations welcome.

Video 1
Video 2
Video 3

Thanks
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Madness
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Posted: 02 October 2018 at 10:37am | IP Logged Quote Madness

Madness wrote:
Turbulence will cause you lots of grief and the harder the wind blows the more turbulent it will be.

I struggled for a few years with a 1500W Dunlite up a 24 metre tower, strong turbulent wind would cause it to turn 360 degrees quite often. AFAIK you need to get at least 10 metres above anything nearby. I had a steep slope to the east and the blowing up it amongst trees was the worst even though the generator was at least 15M above them in altitude. A paper streamer on the end of a very long pole is one way to check turbulence.



If you can get a wind speed indicator on a very long pole and test it up higher I think you will find what you need to do.

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BarkyJ
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Posted: 02 October 2018 at 1:47pm | IP Logged Quote BarkyJ

OK thanks, but still doesnt really solve that I am not getting enough wind...
When its blowing, it spins up fine, but I am just not getting enough over 5m/s, so my load is not engaging. I am not having issues with it not being into the wind, I just dont have enough of it, and this is really designed for over 5m/s constantly, which I just dont have.
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Boppa
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Posted: 02 October 2018 at 4:46pm | IP Logged Quote Boppa

I'd do the height check, its amazing how much difference the height makes to both the turbulence and the speed

Its best to measure (preferably over a long period like 12 months) before starting with wind, years ago I had the fun of watching a major wind genny site being tested, they had probably a dozen different sites within a few kms that had 'temporary' measuring masts up to gauge the local conditions before investing in a full site build (these were the big monster wind gennys- the nacelle was about the size of a container!)
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brucedownunder2
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Posted: 27 October 2018 at 9:02am | IP Logged Quote brucedownunder2

How,s it going BarkyJ ?

Bruce

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BarkyJ
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Posted: 10 December 2018 at 6:58am | IP Logged Quote BarkyJ

Been out of action for almost 2 months, had to travel overseas for work and only recently got back, and now silly season is kicking in. I havent done much more on the windmill, but hope to get it finished over the Xmas break.

Hopefully some more interesting updates to come in the next month.
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