Going to build my for SS phase and i'm going big.

[horizontalp7ane]

I'm going to build a SS phase and i want to be able to cover 375w @ -20c/-15c, i've looked at various threads and i get it now, mixing gas combined condensers, brazing a few pipes, etc etc. These are the following questions i have though.

1) I'm not an artist, and i've seen the evaporators, they have maze designs or what not, kind of like water blocks. This being my first time, i really don't feel like trying to make my own evaporator due to the fact that it could perform worse and be more time consuming( in the future i'll give it a shot ). So i'm wondering is there a evaporator known that can handle 375w of load, tin told me he didn't believe a chilly1 or a kayl evaporator would be able to handle this.

2) I'm guessing here that the bigger units the better cooling, so my question is what kind of size tubing am i looking to be getting and what capacity and size of the SS unit's components should be the minimum for me to use when making the phase to be able to achieve a 375w hold

Any information in regards to the parts i want to be looking at MINIMUM to be able to achieve this goal would be great. So i know exactly what to gun for, the other thing is i intend to run the SS 24/7, i plan to make sure it has no leaks and i will thoroughly test it, so any information in regards to having it run 24/7 with out any issues would be appreciated as well.

I was putting this off due to not having a workshop, i said what the hell i'll buy the tools i get how it's done, just wondering know what the minimum of every component should be so i can achieve my goal and not have some half ass attempt. Look forward to the responses.

[horizontalp7ane]

I was thinking of using one of my 15,000 BTU 110vac air conditioners to salvage a monster compressor and condenser. To achieve 375w of heat coverage i'm guessing big compressors and condensers are a must correct. Also where does one obtain a simulated heat loader or are they custom built as well?

EDIT: btw i don't want it to be bleeding death noise but i do want to achieve my goal so i'm guessing 1/2 HP compressor nothing else? or is 1/3 possible

[Gomeler]

First off hi! Glad you are expressing an interest in vapor phase change cooling for direct die cooling. I'd say it is a supporting hobby of mine but it has gradually become one of my main hobbies.

A few hopefully helpful notes.

It's expensive! The tools needed will cost as much as the raw parts for your single-stage. It is possible to cut some corners but at the very least you need brazing equipment, gauges/hoses, something to pressure test with (CO2/N2 + high pressure regulator works) and something to vacuum with (used compressor will work in a pinch). Tools though are best done right the first time so don't skimp here.

It is dangerous. If you screw up it is possible for these things to grenade, especially when you least expect it. You shouldn't try to get it leak free, it SHOULD be leak free. A system that ingests air turns itself into a elaborate pipe bomb.

Lastly, plan out your build, measure twice, cut once, braze once. You've already stated your heatload, 375w @ -20 Celsius. So with that in hand find a compressor that will shift 375w or ~1200btu/hr at -20 Celsius or colder. Then find a condenser that will be able to reject the 375w from your evaporator plus the heat passed into the refrigerant from the compression cycle and cooling the compressor. Always size up on this, 20% is a nice margin to keep head pressures low. Now calculate massflow and size your capillary tube accordingly and figure out what you want to use for an evaporator. That's all the difficult stuff, the rest is just piecing it together.

However, this is the wrong forum to be asking these questions. Besides Shamino and myself I don't think there is anyone else here that has built or builds such unique systems. I'd highly suggest visiting the phase change section of XS instead -> http://www.xtremesystems.org/forums/forumdisplay.php?f=80. Lots of knowledgeable people there and even more noobs :plol:

[TiN]

C'mon, not only you built systems :D
I've posted mine builds as well here too, in your previous thread, horizontalp7ane. Why did you start this new one?

Also maybe for easy start you can try some aircon conversion. It's almost complete unit, just need to replace evaporator section to direct-die suction line + evap. Or you can try chilling liquid loop WITHOUT any brazing/gas reworks, as I had done some time ago. Report here (http://kingpincooling.com/forum/showthread.php?t=490)

AFAIK main issue with such heatloads and SS is evaporator. It should be massive and very well optimized to maintain low deltaT.

[horizontalp7ane]

As stating going big, as for the evaporator is there an evaporator that can be able to handle the load. I don't have a machine that can mill. The tools i don't intend to skimp on, so i'm wondering any known Evaporator that can be able to handle the load i'm looking at and who should i get in touch with for that.