Author Topic: 15' footer upright and...well upright  (Read 4015 times)

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kitestrings

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15' footer upright and...well upright
« on: November 21, 2016, 12:36:46 PM »
We had a beautiful day here Saturday, and finally got this thing up in the air.  All set except for the tail boom & vane, the twist cable, and the furling line.  Sunday the weather took a sharp turn and snow began, so it will be a few days, or more, before we can finish.  Here are prior links to this project and I'll try to report more once it is operational.

Starting from a week or so back we took down the 25G and assembled a 45G in the same spot:



Blades, turbine and top section ready to go


Larger 45G tower sections



more to follow...

Oh, and here's our project if you haven't followed it:
http://www.fieldlines.com/index.php/topic,148058.msg1026285.html#msg1026285
http://www.fieldlines.com/index.php/topic,149071.0.html
« Last Edit: November 22, 2016, 08:09:45 AM by kitestrings »

kitestrings

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Re: 15' footer upright and...well upright
« Reply #1 on: November 21, 2016, 01:41:04 PM »
Setting the tower top tube-section.  It's 21' and about 170#




Upper and lower connections to guyed tower





Setting turbine


Harold in CR

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Re: 15' footer upright and...well upright
« Reply #2 on: November 21, 2016, 04:57:19 PM »

 Boy am I glad my days of doing that are long past. Nice job.

kitestrings

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Re: 15' footer upright and...well upright
« Reply #3 on: November 22, 2016, 06:19:45 AM »
Neilho, my long-time climbing partner & I did a ton of this stuff when I was younger.  It's actually quite enjoyable, especially when the weather is like this.

You'll notice that Neil modified the large gin head assembly to accommodate chain binders (often used on wood poles for winch/capstan attachments, and gins for setting transformers).  Normally we use ratchet straps, but this made the large gin rock solid which was good given the length of our tube.

The ground crew




Blades going up








kitestrings

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Re: 15' footer upright and...well upright
« Reply #4 on: November 22, 2016, 06:29:05 AM »
Missed a few:

Loading alt


Running out of daylight




View from the top


Sunday (next day) snow, and two days since...

ontfarmer

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Re: 15' footer upright and...well upright
« Reply #5 on: November 22, 2016, 07:31:56 AM »
Thanks for sharing,  great view from up there,  you can be very proud of your work.

kitestrings

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Re: 15' footer upright and...well upright
« Reply #6 on: November 22, 2016, 08:13:46 AM »
Thanks.

The turbine weighs a little over 300#; with the blades and blade plates mounted it is pushing 400#

I also realized I missed (or dropped) one intended link on winding/potting the coils:
http://www.fieldlines.com/index.php/topic,147846.msg1023897.html#msg1023897
« Last Edit: November 22, 2016, 08:18:02 AM by kitestrings »

kitestrings

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Re: 15' footer upright and...well upright..and now turning
« Reply #7 on: November 28, 2016, 10:47:55 AM »
After a few days of snow, and wind, we got a gift.  Saturday was warm, and near dead calm.  With Mary, my wife, on ground crew we set out to set the tail.



A commercial windfarm to the west of us; spectacular views


Sunday morning.  Colder, steady wind 5-15+mph.  The turbine complete on it's new perch; 85'.  Wired in and furling line released...


The 'Classic' CC recording power.


The rpm gauge on the rectifier indicates the rotor speed.


So far...so good.  It is furling much earlier which was the primary focus of our redesign efforts while down, described here:
http://www.fieldlines.com/index.php/topic,149071.0.html

The balance is much better this time around.  We've got a blade nick, or perhaps where I left some unsanded epoxy that is contributing a bit of a whistle.  Otherwise, I'm happy to have it functional again.  We gather about 4 kWhs form Sunday ~1 PM to midnight when I shut it down.  For now I'll be keeping close tabs on it.

~ks

SparWeb

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Re: 15' footer upright and...well upright
« Reply #8 on: November 28, 2016, 05:46:35 PM »
Your hard work pays off!

Thanks for posting all these pictures.  Hope it produces more and more often now.
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

System spec: 135w BP multicrystalline panels, regulated by Xantrex C40, DIY 8ft diameter wind turbine, regulated by Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024

kitestrings

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Re: 15' footer upright and...well upright
« Reply #9 on: December 01, 2016, 10:24:32 AM »
Got a pretty good test last night.  Its been warm, and we had a steady SW wind 10-15 mph with predicted gusts of 25 mph; "40 mph over ridgelines" (I think that's us).  I let it run up until about 11-12 midnight when I turned in, but it got hellish after that form the sounds.  I've got to get an anemometer up.

I'm real happy with where we are furling now.  It appears to start in the 15 mph range.


This is the "Local app" which allows you to worry from the couch, with a beer to help calm the nerves.


There are a number of ways to shut down.  The softest, and my preferred, is to manually furl the tail (with a small hand winch).  The dump load will slow it pretty smoothly, but I also kept the park-brake located just above the 50A twist-lock plug/receptacle


Here's our hard working crew


and one more pic from up top

Boondocker

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Re: 15' footer upright and...well upright
« Reply #10 on: December 03, 2016, 06:22:49 AM »
Great Photos!

It show that making power with the wind is not a "passive" method.  It is certainly rewarding learning and applying skills to see those watts come down the tower.

Based on your weather description, are in the Northeast?

Boondocker.

kitestrings

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Re: 15' footer upright and...well upright
« Reply #11 on: December 06, 2016, 11:42:29 AM »
It seems to be producing really well, particularly in low- to moderate winds, and furling sooner and more consistently.  This had been an early goal.

Last night it the weather called for only 6 mph winds, yet we logged 2.5 kWh just from the time I got home ~5:30 to maybe 11 PM.  Our top end so far has been 2.9 kW on Classic "A" and 1  kW on "B".  Plenty high enough - I'm happy to sit out the really rough stuff for now.

Quote
Based on your weather description, are in the Northeast?

Yes, we're in the northeast "kingdom" of VT, close to the Canadian border.
« Last Edit: December 06, 2016, 05:18:01 PM by kitestrings »

SparWeb

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Re: 15' footer upright and...well upright
« Reply #12 on: December 11, 2016, 11:02:28 AM »
Quote
Yes, we're in the northeast "kingdom" of VT, close to the Canadian border.

Ah, so that's why your photos of the view are so beautiful.
:)
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

System spec: 135w BP multicrystalline panels, regulated by Xantrex C40, DIY 8ft diameter wind turbine, regulated by Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024

kitestrings

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Re: 15' footer upright and...well upright
« Reply #13 on: December 16, 2016, 08:37:11 AM »
We had some pretty sustained winds here.  Some of which we just "rode-thru" with the machine furled for the night.  Pretty much any forecast over about 15 mph this time of year can be rather rough on our hill-top; more often at night.  I'm generally more focused on kWh production through more laminar winds, but so far I'm happy to see that the controllers are now complimenting one another.  This had been an early road block with the controllers.

Here's a typical high recorded on Classic "A", which takes the first ~2.5 kW from the turbine.  It is current limited at 46A, at which point the voltage rises and Classic "B" takes over the upper section of the power curve.  Classic "B" awakens at 90V, and starts to load ~115V.




We run from a cut-in voltage at about 58VDC to a top end at about 160V.  We load divert at ~-1.0V below set-points, then at 125V we start to engage the load bank on the AC input to limit the rise.


The machine is furling really nicely, consistently now.

gsw999

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Re: 15' footer upright and...well upright
« Reply #14 on: December 16, 2016, 04:29:56 PM »
Impressive stuff , I wanted to be rude and ask what the cost of this setup was bearing in mind you did everything yourself, you nailed it for sure !!

kitestrings

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Re: 15' footer upright and...well upright
« Reply #15 on: February 01, 2017, 01:57:17 PM »
Just thought I’d post some data I’ve been gathering on this turbine, and some general comments.  Below is what I've recorded looking at Vin relative to output


We seem to have the power curve pretty well dialed in now.  It took a bit of finesse on the settings to get it not only reasonably well matched, but where the split from one controller to the other was good.  Back before Christmas we had a day where we recorded a peak output of 5.3 kW.  Great, except that 4.2 kW was on all on the first unit.  By tweaking the power curves and current limits we’re able to limit the first unit to about 2.6-2.8 kW and have the second one pick up the balance.
   

It is producing meaningful amounts of power this winter, despite being shut down most of the time when I’m gone; probably overly cautious.  It is also furling very smoothly and reliably which has improved my comfort level.
It produces well in relative light winds – 300-800 watts with negligible wind at ground level – and we regularly see peak outputs of 2-3.5 kW whenever the local “Intellicast” forecast shows 8 mph or better.  When the weather’s a little more cooperative I’ll look to get an anemometer up.  Still, it is really kWh that pay the bills so to speak.  I good day from my perspective is when I’m around for the day and start the thing in the morning, and we log 4-6 kWh by the time I shut it down for the night.

Boondocker

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Re: 15' footer upright and...well upright
« Reply #16 on: February 01, 2017, 05:48:26 PM »
Hi Kitestrings,

Looks as you are on a good wind site.  What are doing with all of those peak watts?

It is certainly nice to have a larger turbine to harvest appreciable power just above cut-in.

Kind regards,

Boondocker

kitestrings

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Re: 15' footer upright and...well upright
« Reply #17 on: February 02, 2017, 11:49:55 AM »
Quote
What are doing with all of those peak watts?

Well, we've got a much bigger tank than we've had in the past.  Our battery bank is now 1,233 Ah at 48V, or about 30 kWh usable (at 50% DOD).  We've gotten accustomed to using power when it is available - delayed timing of laundry, scheduling shop projects, and the like.  And, we're also load diverting to a water preheat tank using the Waste-not function of the charge controller.

kitestrings

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Re: 15' footer upright and...well upright
« Reply #18 on: March 12, 2017, 04:13:09 PM »
Quote
We seem to have the power curve pretty well dialed in now.

I might of known that was premature.  I don't know if anyone else has gotten the winds we have in the last few days, but it has been wild here.  Yesterday the temps were -17F in the morning and never got above 4 to 5F all day.  I mostly watched, and tweaked our turbine when I wasn't feeding the wood stove.  Then there was the wind.  Steady in the 15-20 mph range all day yesterday and last night; gusts around 45 mph.  Today they were a bit less, but steady all day long.

On Thursday we logged a high output of 3,760 w on one controller and 1,064 w on the second.  The Classic 250's have a max current rating of 62A at 25C; derated current is 52A at 40C.  The fans are non-programmable and go ON at 48C; Off at 45C.  I had the current limit set at 42A on the fist unit.  I know it is only briefly at the 'max output', but it is just too close for my liking.  It comes up fast with the right gust (unfurl, yaw..and bam).  I loaded yet another power curve (I'm on MEM6 now), this one has the current limit at 40A, and the second unit is set to 'wake' earlier, and load more.

I'm anxious to see what it recorded today - which won't post until midnight - but yesterday we had similar overall output, but the first unit held at about 2.8 kW, and the second one grabbed just short of 2 kW.  I wish they allowed the two controllers to share equally, but they never pursued this firmware option.

The furling performed really, really well.  This was probably the roughest sustained winds that we've let'r run through.  At times it will fold and stay there through a pro-longed high point, or stay at near full-furl position 'til it subsides.  I'm fine with this.

~ks
« Last Edit: March 13, 2017, 06:30:45 AM by kitestrings »

kitestrings

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Re: 15' footer upright and...well upright
« Reply #19 on: March 13, 2017, 06:39:33 AM »
(comparatively balmy) Burlington reported that Saturday was the coldest on record since 1885...we were about 6-7 degF lower than by the lake.

Our peak output for the day yesterday was 2,886w on the first controller and 1,350w on the second with a peak PV in (input voltage to the controller) of 126V.  This looks a bit better to me.

SparWeb

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Re: 15' footer upright and...well upright
« Reply #20 on: March 15, 2017, 03:27:58 PM »
I hear the whole Eastern seaboard had crazy winds for days.
Heck of a shakedown for your 15-footer.
No one believes the theory except the one who developed it.  Everyone believes the experiment except the one who ran it.

System spec: 135w BP multicrystalline panels, regulated by Xantrex C40, DIY 8ft diameter wind turbine, regulated by Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024