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Eci 33+ - Page 4

post #31 of 109
Getting along there, looks great!

Going to look nice in my new computer.
Michael
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Michael
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500 GB WD 7200 RPM + Maxtor 120 GB 2x Sony DVD Burners (24x) Windows 7 RTM x64 ACER 23" 1920x1080 x233h 
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post #32 of 109
Thread Starter 
Let me explain this picture a bit.
It's fairly hard to shove one tube inside another tube. It's especially hard as the lengths required get long and longer. When making a heat exchanger using 3/16 and 3/8" tube, it becomes an exercise in insanity.

Both tubes must be nearly perfectly straight.
That means, even the tinyiest imperfections become a problem. As you begin to push one through, friction becomes a huge problem. Even a degree or two at a tiny spot pushes parts of the tube against the inside of the other tube.
This isn't a problem with performance, simply that it becomes impossible to push one tube in any farther. You must then withdraw it, figure out what's stopping you, touch it a tiny little bit, and try again.

My method involves 5 ft long steel beams and clamps.

Clamp the tubes straight as possible.

And try.

When your looking down a 20ft long barrel though, things get interesting.
This took 3 days.

post #33 of 109
Thread Starter 
And bent on up.
20" by 12". 4 loops or so tall.
Should be adequate heat exchange. And nice and easy to insulate, I hope.



post #34 of 109
so cool
Fuegos v2
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Fuegos v2
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post #35 of 109
Thread Starter 
Second heat exchanger rolled, CPEV's tested played. Nice and up front. They will be "separately" insulated in their own little sealed box.

Now thats sexy. And under 3 inches tall.
post #36 of 109
wow.

what kind of torch do you use for brazing?
Fuegos v2
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Fuegos v2
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post #37 of 109
Thread Starter 
That MAPP in post 33.
Tuned in it works fine for evaps too.
post #38 of 109
Thread Starter 
Pink time!
Those CPEV's are looking beastley aren't they?


post #39 of 109
Thread Starter 
I think I went a bit overboard height wise. Don't need that much! (Yay the cascade just got shorter!) I think I'll shave 2 inches off of her. Having the "low" HX in the center helps with the insulation of it. Normally -80 to -90C would require 3" of foam.



Need to get cracking on getting that condenser for the first stage, I have a back up, but it's not as pretty or dense. Then I can worry the evaporator.
post #40 of 109
Thread Starter 
5 of 6 gauge kits.
2 ft of 1/8" tube on each, after brazing in an inch and a half of 1/4" tube to a tube adapator.
Will find that last bit or just pickup another while I'm at homedepot getting JB Weld for these joints. I don't like teflon tape, it's just not robust enough for me.

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