Author Topic: My 17' Turbine so far  (Read 47294 times)

0 Members and 1 Guest are viewing this topic.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #90 on: March 07, 2012, 06:05:19 AM »
Changed the MPPT curve with Rob Beckers help.  Here's the new curve.  I did flattened it out around 135VDC to help it pass through that area of the curve that the alternator has a vibration, other wise it is the same as below and a more aggressive curve than I had.

When I finally was able to start get frequency readings, to figure Rpm, I realized I was letting it run too fast and out of TSR of 6 that I was aiming for.  I should have figured that out a long time ago.

Windy days here in Indiana.  Set a new record for yesterday 43kwh for the day.  Today should even be better.

Wind (m/s)   RPM   Freq. (Hz)   Heat (W)   Eff. (%)   DC (V)   P (W)
2.5   55   7.4   3   97%   68   31
3   66   8.8   5   96%   81   81
3.5   77   10.3   9   96%   93   149
4   88   11.8   16   95%   106   238
4.5   100   13.3   25   94%   118   351
5   111   14.7   37   94%   130   491
6   133   17.7   76   93%   153   857
7   155   20.6   139   91%   175   1355
8   177   23.6   234   90%   197   2003
9   199   26.5   370   89%   217   2814
10   221   29.5   559   88%   237   3804
11   243   32.4   810   87%   256   4985
11.9   263   35.1   1101   86%   272   6222

klsmurf

  • Full Member
  • ***
  • Posts: 153
  • Country: us
  • "Damn it Jim, I'm a carpenter, not an electrican"
Re: My 17' Turbine so far
« Reply #91 on: March 07, 2012, 06:51:54 AM »
Hey Nekit,

Glad to see you getting everything tuned in. I've been following your thread from the beginning and am very impressed!

If you don't mind, what part of the great Hoosier state are you from? I'm in the northern part, half way between Indy and Chi-town just off I-65. I'ld be up for a road trip to see your turbine if you don't mind visitors.

Kevin
" A man's got to know his limitations " ------ Harry Callahan

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #92 on: March 08, 2012, 08:11:39 PM »
Crazy Winds yesterday.  20.2 average wind for the day with gusts to 45mph.  Generated 55 kWh for the day.  Blowing strong from Midnight to Midnight.  Had several peaks of 6500w.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #93 on: April 30, 2012, 07:18:10 AM »
With spring here I finally getting around to some lightning upgrades that I've been wanting to do.

When I originally installed the foundations for the tower and each of the 4 guy wire mounts I installed 8' lightning rods in the bottom of the 4' holes of the foundations.  These rods are connected to the reinforcing cages in the concrete which is connected to the tower and the guy wires.  I also installed a rod at the base of the tower by the shorting/brake switch and at the inverter in my shop.  At each of these locations I also have Delta lightning protection devices.

This last weekend I had a trencher to install my FIT solar and wind.  Since I had the trencher decided to add grounding lines running between the tower base and each of the guy foundations.  Trenched 18" deep installed a 8' ground rod half way between each, and added an additional rod at each guy wire support for the cables to ground to.  All the grounding locations are tied together with #6 solid copper and some much larger copper that I had at the base of the tower.

I know that I can still take a hit, but hopefully this helps me sleep.  We had a hit at the large 900KW 300' Turbine that is less than a mile from me the other morning and it made think.  I'm also hoping that it works as a lightning rod and takes most of the hits compared to my little 100' machine.

I used a lot of info from Rob Beckers site Solacity.com for the lightning protection info.  Thanks Rob.  I'm also building some surge protectors from a bunch of varistors that should clamp down at 600V with a 170KA capacity.  These should help as the Delta surge protection doesn't kick in till thousands of volts.
" alt="" class="bbc_img" />

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #94 on: April 30, 2012, 07:47:35 AM »
Thought I would also update on status of my project while I'm at it.

I've had the turbine running since July last year.  So far no major problems.  Have seen winds of 50-60mph.  Has maxed out at 6500W peak, 55kwh for the day and total of 2700kwh for the past 10 months.  I think this would have been higher, but my MPPT programming was wrong for the first 8 months and is making much better power now.  I also shut it down for the first few months whenever I had a major wind event happened, not sure what it could handle.  Now I leave it on unless something really crazy passes through.

I still could add more weight to the tail and have it furl a little later, and probably will.  For the most part the Inverter keeps it under control and the furling just feathers it out of the extreme winds.

I have had a power failure in 40mph+ winds and the dump load keeps it under control.

Lessons Learned. 

Use an aggressive power curve to keep the turbine under control and at TSR. 

The generator has a growl at about 10mph that vibrates the tower.  It's just the cogging of the gen at a certain load, around 140VDC in my case.  I've gotten used to it, but if I ever redesign the generator I'll try and use a design with less cogging.

I've loved designing, building and maintaining this turbine.  Lately solar has gotten so cheap, from a $ per W stand point, and low maintenance . Solar makes more $ sense.  That being said I would still build my turbine, as I love it.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #95 on: May 08, 2012, 12:09:02 PM »
Added some more lightning protection  I built these varistors in parallel for surge protection.  They are rated at 420 DCV an 22K A each.  4 of them on each leg is 88K a per leg or 176K A total capacity.  Four have one leg goes to the + DC side and one goes to the common and 4 have one leg -DC and one leg common.

They should ground out at 420 VDC and protect at a much lower voltage than the Delta surge protection.

taylorp035

  • Hero Member
  • *****
  • Posts: 1005
  • Country: us
  • Stressed spelled backwards is Desserts
Re: My 17' Turbine so far
« Reply #96 on: May 08, 2012, 12:15:21 PM »
To solve your vibration issues, maybe you could add a mass - spring damper to change the frequency and damping characteristics of the tower.  Or even just adding some weight to the vibrating tower area, which would lower the frequency at which it vibrates.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #97 on: June 30, 2012, 08:15:38 AM »
Added nearly 5kw of solar.  Not nearly as exciting as wind, but it sure puts out nice stead power.  System consist of 20- Evergreen Solar 220W panels that I got from Sun Elec. for 78 cents/watt and Power One 4200 Inverter.  Built the mounting system myself.  6" dia. tubes on each end of frames made of 1" square tubing.  Each frame holds 4 panels.  Tiltable for summer and winter angles.  Local power company is paying me Feed In Tariff of 30cents/kwh for solar and 17cents/kwh for wind.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #98 on: June 30, 2012, 08:36:48 AM »
Figured while I was updating I'd show my solar hot water system.  It consists of 4 panels of 15 vacuum tubes each for 60 tubes.  I have a 100 gallon Stiebel Eltron tank w/exchanger on a closed loop system w/Ghrundfos pump.  Supplies all my domestic hot water and supplements my radiant floor heat.(very little)  I also have a backup on demand heater.  Been up and running for about 4 years.  For the $ this system is a no brainer.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #99 on: October 28, 2012, 07:29:12 PM »
Just an update.  Turbine is running good.  It's been up and running for a 1 1/2yrs now.  Seems to be holding up well.  Has made 3600kwh over the past 12 months.  Removed the furling shock and added some more weight to the tail a few months ago.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #100 on: December 03, 2012, 06:05:31 PM »
Thought I would post how I monitor my system.

I have a FIT-PC brand mini computer that I purchased on eBay for $200.  It is located in my shop by my inverters and is running all the time and only uses 6watts.  It is streaming to Logmein free software that I can look at my system from any computer or smartphone anywhere in the world.  I have "communicator" the Power One inverter monitoring software always running.   Fairly low cost and low power usage.

Here's a screen shot.
« Last Edit: December 03, 2012, 06:11:13 PM by nekit »

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #101 on: August 17, 2013, 07:14:59 PM »
Update:
Systems been up for about 2 years now.  No failures, just routine maintenance about every 6 months.  Seems to put out about 3700kwh per year.

Added another 6 kw of solar.  Cranking out the solar in these windless summer days.

SparWeb

  • SuperHero Member
  • ******
  • Posts: 3388
  • Country: ca
    • Wind Turbine Project Field Notes
Re: My 17' Turbine so far
« Reply #102 on: August 20, 2013, 07:20:21 PM »
Wow!
That's a nifty array - look like big Kyocera panels.  28 of them I guess.
Solar has really come a long way in the past 10 years hasn't it!

Thanks for the update, and glad you still think of us from time to time.

Still satisfied with the solar hot water?  I privately thought the high angle of those collectors would cause trouble.  If you've had little trouble with them, it would also be good to know, too.

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

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #103 on: August 20, 2013, 08:01:19 PM »
Nope the solar water works good.  In the summer have more hot water than we know what to do with.  In the winter the high angle help gather what little sun we have.

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #104 on: July 14, 2015, 08:51:19 PM »
Figured I would post an update. Been running for over 4 years.  Take it down once a year a pump grease in bearings and check/tighten axle bearing. Has been trouble free and makes 250kwh per month.

SparWeb

  • SuperHero Member
  • ******
  • Posts: 3388
  • Country: ca
    • Wind Turbine Project Field Notes
Re: My 17' Turbine so far
« Reply #105 on: July 17, 2015, 10:24:46 PM »
Thanks nekit,
Updates are welcome.  It's nice to know that your beautiful machine is still running well!
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

Rob Beckers

  • Full Member
  • ***
  • Posts: 131
  • Country: ca
Re: My 17' Turbine so far
« Reply #106 on: July 18, 2015, 05:11:15 PM »
Figured I would post an update. Been running for over 4 years.  Take it down once a year a pump grease in bearings and check/tighten axle bearing. Has been trouble free and makes 250kwh per month.

Thanks for the update!
Incredibly well-made machine, and tower. Certainly better than just about anything you can buy out there.

Just wondering, did you ever have a (nearby) lightning hit? All the things you put in place should help if that does happen.

-RoB-

nekit

  • Full Member
  • ***
  • Posts: 138
Re: My 17' Turbine so far
« Reply #107 on: August 05, 2015, 09:38:16 PM »
I haven't had any nearby lightning hits that I know of. Their is a 250' 900kw turbine about a mile away. I'm hoping it attracts all lighting away from me. 😀

Timbersawz

  • Newbie
  • *
  • Posts: 22
  • Country: nz
Re: My 17' Turbine so far
« Reply #108 on: February 10, 2016, 02:31:01 AM »
awesome, inspiring! Great work mate!