Previous in Forum: project   Next in Forum: automatic switch
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
8 comments
Rate Comments: Nested
Merle
Associate

Join Date: Mar 2010
Posts: 28

Heaviest Equipment Transported in Hydro-Plant

05/06/2010 2:08 AM

I am working for a mega hydro- project. We are doing preliminary study on road and bridge network that might be required for transportation of heavy E-M equipment from its manufacturing site to Project site. Since project is in a mountainous terrain, the only transportation mode is via. road.

Since we will be assembling generator at site. I am assuming the heaviest equipment that need to be transported will be transformer which transported as a built-unit. We will have 3 single phase transf. forming a bank.

Is it correct to assume that, heaviest weight that need to be transported would be transformer?

Give me some inputs.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
peterg7lyq
Guru

Join Date: Jan 2010
Posts: 2446
Good Answers: 60
#1

Re: What would be the heaviest equipment to be transported in hydro-plant?

05/06/2010 2:26 AM

what about the gen set
Register to Reply
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#2

Re: What would be the heaviest equipment to be transported in hydro-plant?

05/06/2010 2:45 AM

That would be one likely candidate; another would be the rotor or stator of the largest turbine, or the crane to lift it into place.

Sometime around the middle of the last century, there was an incident in which an electromagnetic coil weighing around 200,000 pounds (turbine or cyclotron or what, I don't remember). When the truck arrived at the destination, the coil was missing! How such a thing vanished without the driver noticing is hard to figure. Of course, they retraced the route in search of it, but no luck.

About 20 years later, a swamp next to the road was being drained, and an enormous object was found. This baffled everyone as much as the original driver, until someone finally put two and two together.

My wife and I once passed a 58-wheeler, including 4 axles of 8; which is about what it would take for a task like this.

Check with the component manufacturers for the various weights--and use really strong bungees to tie them down! Also check dimensions as they relate to bridges, tunnels, overpasses, etc.

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Merle
Associate

Join Date: Mar 2010
Posts: 28
#3
In reply to #2

Re: What would be the heaviest equipment to be transported in hydro-plant?

05/06/2010 3:12 AM

Tornando, thanks. The incident you narrated is interesting.

Usually, what I observed was that, rotor and stator is built at site right from the scratch by the contractor for big machine. Maybe another aspect I need to consider is weight of shaft which actually get transported in one solid piece. I have also seen that turbine parts get like housing and all get transported in segments too.

As for the EOT crane, doesn't't it get transported in segments??
Register to Reply Off Topic (Score 5)
suresh sharma
Guru

Join Date: Dec 2007
Location: Mumbai, India
Posts: 1983
Good Answers: 25
#8
In reply to #3

Re: What would be the heaviest equipment to be transported in hydro-plant?

05/07/2010 8:17 AM

Hi Meri,

EOT Crane can be transported in the segments such as Main Girders, End Carriages, Crab, Platform (Walkway), Control Panel, Cabin etc. Crane is assembled and erected at the site. Heavies item is Girder which long steel box. How ever you have check if long Girders can be negotiated on road bends on the mountain road. Also the weight bearing capacity of the bridges/ culverts.

__________________
 "Engineers should not look for jobs but should create jobs for others" by Dr.Radhakrishnan Ex President of India during my college graduation day
Register to Reply Off Topic (Score 5)
old salt
Guru
Safety - Hazmat - New Member Engineering Fields - Retired Engineers / Mentors - New Member Engineering Fields - Piping Design Engineering - New Member Hobbies - DIY Welding - New Member Fans of Old Computers - PDP 11 - New Member

Join Date: Feb 2007
Location: Stronger Than The Storm
Posts: 2394
Good Answers: 203
#4

Re: Heaviest Equipment Transported in Hydro-Plant

05/06/2010 11:36 PM

Rotor/Stator is generally the heaviest unit that is transported for this type of project. Although transformers are big they are not as dense as the rotor/stator. Transformers for power stations have alot of open space within them to hold the oil for cooling them.

Also it is best to assemble the generator as completely as possible in the manufacturer's shop to keep our debris and other junk.

__________________
 Any day on the green side of the grass is a GREAT DAY!, --- me +++++++++. I believe creativity is an inherent part of everyone. --- Kermit T. Frog
Register to Reply
pcchatur
Power-User

Join Date: Mar 2010
Location: BHOPAL, INDIA
Posts: 201
Good Answers: 20
#5

Re: Heaviest Equipment Transported in Hydro-Plant

05/07/2010 12:58 AM

Please get in touch with the equipment supplier. They take care of transportation feasibility at the design stage itself. Hydro-generator stator, depending on the power rating and speed can be designed in number of segments which are wound at works leaving ends open. These segments are assembled at site and complete winding connections are made. As regards rotor is concerned, it can be assembled (Rim and yoke portion) at site. Magnetic poles are dispatched separately. So in all probability transformer would be the heaviest lift. Some of the hydro turbine parts may also be critical for transportation. This would depend on type of turbine.
Register to Reply
2
Anonymous Poster
#6

Re: Heaviest Equipment Transported in Hydro-Plant

05/07/2010 1:01 AM

What you are thinking is absolutely correct. For Large Hydro plants single phase transformers are generally the heaviest equipment to be transported, to minimise the transportation weight of the transformer it is to be transported in gas (nitrogen) filled condition and finally oil shall be filled at site during erection.

other critical heavy weight items to be transported are:

1. Spherical Valve - if it is a high head plant or Butterfly Valve for Low head plant.

2. Turbine shaft -

3. Some of the Construction Civil Equipment

regards
Register to Reply Good Answer (Score 2)
No more Good Answers.
Merle
Associate

Join Date: Mar 2010
Posts: 28
#7
In reply to #6

Re: Heaviest Equipment Transported in Hydro-Plant

05/07/2010 3:05 AM

prc and Guest, thank you so much for the reply. I am confident that I am on right track now. :)
Register to Reply
Register to Reply
Have a Different Question?
8 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Merle (2); old salt (1); pcchatur (1); peterg7lyq (1); suresh sharma (1); Tornado (1)

Previous in Forum: project   Next in Forum: automatic switch

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Engineering Projects:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (98 right now)
Show Members
Advertisement