Sunday, February 5, 2017

Building Wind Farm Windmills

Sometimes you use trains to haul the equipment near the site.

One option is to lift each blade separately:

Shawn Douglas posted
2250 doing single blade install

Another is to install the blades on the ground and then...

Shaun Douglas posted
16000 and the little guy is a 2250.
Shaun Douglas This job was in 09 in southern utah
...lift the whole assembly up to the top.

Shawn Douglas posted
18000 in Maui.
Parker Mims How much sticks that got in it? Around 300' or so?
Shaun Douglas I think 340
Kyle Avinger 0 wind speed @ time of pick?Shaun Douglas There was always wind. The towers were built with the wind blowing into the face of the tower. The wind always blew the same direction.
Shaun Douglas commented on his posting
All 8 were built facing into the wind.
Update:
Shaun Douglas posted
Ronald Ritter 1 tower covered by the other.Shaun Douglas Well I was at the top of a tower 2 towers away and that's the best I could get lol
[I could not figure out what was happening until I saw Ronald's comment. It is interesting that the tops of the three towers are in a straight line.]
Sean Jett posted two photos:

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1

Al Easton posted
Yan Duguay posted
Ben Stalvey Big bad 16000
Jason Morgan posted
Another day at the office
Ports of Indiana
[I wonder if these are being imported or exported. I read about a forklift handling the big blades like "toothpicks." Judging from the men standing by the blade, the tires on this forklift are about waist high. Given that the ship has three cranes, it is interesting that a dock side crane is also being used.]

This video taught me why they needed a ground based crane even though the ship had its own cranes. It appears that the ship normally docks with its cranes on the dock side and passes the load between the cranes. But in this case the load was too long to pass between the cranes. So they docked the ship with the ship's cranes out of the way and brought in a land based crane to handle the blades.

Jens Hadel shared
Liebherr LR 11000 with Sennebogen 5500


Video shows the construction of a tower. There is a time lapse at the end of the video that compensates for the "tight editing" in the rest of the video. It is amazing how many contemporary construction videos include, what I assume is the safety meeting, where the manager stands in the front of the workers and tells everyone to work safely.

This contractor adds one 177-foot blade at a time rather than build the hub assembly on the ground and lift all three blades at the same time as we have seen at other sites.

Josh Neudorf A couple 16000's and a MLC 300 on a job we did a couple years ago.

Winifred Stephenson Cool! How do they handle the threat of tornadoes? Won't even think about fracking earthquakes....but, it just seems so much more worthwhile to use technology and industry for these things with a future!! Great building job, too!

Noah Aronson Did I see that right? No deep foundations, just a big a** spread footing?


Screenshot -0:10
A video showing a mobile crane instead of a crawler crane being used to erect the windmill. But it is so big that it needs the help of other another crane and truckloads of stuff to build it up for the job. The video uses a "choppy" style, so it was hard for me to understand how it was built.
Brian Horsman posted
Gearbox changeout today on a GE 1.5.
Jake Wiseman 1/2 done 3-1/2 to go
[Wow. Big windmills have not been around that long. I'm surprised the gearbox is shot already. That is expensive maintenance to setup the crane and take all of the blades and hub off. It sounds like just four of the windmills in this farm need a replacement.]
Lanna N Eric posted, cropped
Two years ago in Iowa [2015]
Brian Schenck Hurry up base mid. Top-off coming in
[This implies the little crane is used to start the tower and probably add the blades to the hub and then the big crane finishes the tower and then adds the nacelle and blade assembly. Moving that big crane from one tower to another would require a very firm, level road. A slight tilt of that long boom would move the high center of gravity too far to the side.]
Rob Freestone posted two photos. In the second one they must be laying out the boom for disassembly because they have the dolly on the end of the luffer.

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We have already seen they need to use a big (expensive) crane to replace the gear box. Here are a couple of postings of a crane replace a burnt nacelle.

Robert Pickel posted
Robert Pickel posted




A time lapse video of raising a hub+blades assembly from Rob Freestone.

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