Water Cooled Generator Windings 2

[rovineye]

I have never seen a generator that has water cooled windings, but I know they are out there.

I am wondering if the cooling medium (de-ionized water?) flows thru the hollow windings in direct contact with the copper winding or if there is a tube or coating inside the winding made of something other than copper?

 

[ScottyUK]

PTFE hoses carry DI water directly to the tubular copper windings on those I have seen.


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If we learn from our mistakes I'm getting a great education!

 

[edison123]

What Scotty says. Every alternate conductor in a stator bar is hollow carrying DM water from one end to the other end. All the hollow and solid conductors are brazed to a water box (that is the trickiest part that can leak water) and the water box is fed by PTFE hoses connected to a header.

 

[rovineye]

Thanks guys.
I am considering a repair to a soothing reactor. The hollow copper windings are lined with stainess tubes which carry DI water. My DI water system is deaerated, resin bed controlled, and monitored for conductivity. One SS tube is leaking, and the proposal is to weld the SS tube to the copper at both ends of the windings. I don't even want to think about that weld, but that aside, my concern was that the DI water is now in contact with copper and could corrode/waste. But knowing it is done in some xfmrs and genrators at least addresses that concern.

 

[itsmoked]

By definition you cannot weld those two materials together. You can only,(maybe), braze them.

Keith Cress
kcress -

http://www.flaminsystems.com