using this wb base for evap

[Marvin]

I have a storm water block base laying around here. My idea is to make a cap in cap evaporator from it.
It has 5 mm base and smalls holes in the center.
I was planing to use the center piece, as a round base. The max ¨usabe¨ area has 42 mm.
what do you think ?
the small holes could improve the cooling ?
Regards
http://www.xtremesystems.org/forums/attachment.php?attachmentid=38946&stc=1&d=1130025341

[n00b 0f l337]

Yep cap in cap works very well. Get a hole saw and cut a circular peice out of that base as well.

[Marvin]

Thanks for the response.
what kind of saw can cut copper without damaging it ?
regards

[Fhqwhgads6680]

Yep cap in cap works very well.

uh I don't know about that.... I made one with a good amount of caps and I found two things (and this was on an A64 SINGLE CORE back in the day) one: they suck under high load due to heat having to transfer through brazes and two: you might as well forget using in a tower setup as refrigerant pools in on the caps and temps go to crap. I idled in windows horizontal (bench setup) with about -22c temps with R22 and a tad over 0 running orthos. Then I switched to to my tower and idle drop to -9 c and I shut the PC off when it went over 20c. I will never run cap in cap again, they are a PITA to make and are hardly worth the effort. My 2 cents....

[n00b 0f l337]

As far as $5 evaporator, they work pretty well. Great for a starter build or the like. Also, while orientation means quite a bit with a cap in cap, it means quite a bit with any evaporator.

[boshuter]

I'm going to agree with NOL on this one.... a cap in cap can work very well. I've built a couple using a Maze4 GPU block for the base and they did an excellent job. The first one I made I tried out on a 1/4hp single stage that had a Chilly1 spiral evap on it; I replaced the Chilly evap with the cap in cap and retuned, if there was any performance hit it was so small as to be meaningless. I built another for the budget single stage contest that never got off the ground and just recently went ahead and put that system together with a little 7.5b Danfoss, the small compressor and cap in cap evap will hold 200w @ -23c (measured at base of evap and using a dual cartridge heater load tester, which is much higher than a calculated 200w cpu load).

The orientation deal may be correct, I've never used a cap in cap on a system in a case, just on bench setups.

[n00b 0f l337]

Also how you do the holes in the caps makes a huge difference.

[Fhqwhgads6680]

I'm going to agree with NOL on this one.... a cap in cap can work very well. I've built a couple using a Maze4 GPU block for the base and they did an excellent job. The first one I made I tried out on a 1/4hp single stage that had a Chilly1 spiral evap on it; I replaced the Chilly evap with the cap in cap and retuned, if there was any performance hit it was so small as to be meaningless. I built another for the budget single stage contest that never got off the ground and just recently went ahead and put that system together with a little 7.5b Danfoss, the small compressor and cap in cap evap will hold 200w @ -23c (measured at base of evap and using a dual cartridge heater load tester, which is much higher than a calculated 200w cpu load).

The orientation deal may be correct, I've never used a cap in cap on a system in a case, just on bench setups.


for the price, yes they do work fine. but I just feel that if you are going to put the time and effort into a system these just become the weak link. Plus the fact that if you aren't very good at brazing, and are purging like you should be they just suck to make, trying to get the whole thing hot without knocking the cap underneath loose can be difficult for beginners. By far the most annoying thing I have ever brazed together. Maybe if you are low on cash and only using for a bench setup up then sure.... otherwise... I'd spend the little extra and get something solid. Just MHO

edit:I have used Kayl's stepper, Chilly1, and cap in cap. Cap in cap (horizontal) was about 2-4 warmer than a chilly1 and my kayl stepper was about 2-3c cooler than my chilly1. Obviously other factors come into play but these were all used on the came compressor, same gas, same condenser...

Chilly's did a tad bit better delta from horizonal to tower setup than the kayl which is pretty apparent due the design, and the cap in cap fell on its face. I had planed to use the cap in cap on a tower setup thinking it wouldn't do much worse than a stepper on its side, but I was way wrong... maybe thats why I am bitter lol

[[XC] gomeler]

My cap in cap resulted in some rather nice temps but it had trouble handling anything above a 200w load. It was also coupled with a 1/2hp hermetic compressor so it wasn't very efficient. Now I'd rather just buy a ready-milled evap rather than go through the trouble of making one of those again. Great for learning through.

[Marvin]

thanks for all. The base will have 42 mm , (the last cap)
After a cleaning :
But how can the center holes can improve the evaporator ?
Regards.

[killermiller]

What is a "cap in cap"

[Pete]

See first photo of copper tubing end caps, well stack them on top of each other. There is ya answer! Photos speak more than words 99% time

[killermiller]

See first photo of copper tubing end caps, well stack them on top of each other. There is ya answer! Photos speak more than words 99% time

Well is doesn't tell me how it is going to be built. Where is the suction line or cap going to go?

[n00b 0f l337]

Suction to the top most cap, and I like to run the captube thru the center as well to the middle cap.