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New Member- designing a immersion, subzero system

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which would require a full vacuum / 200 psi pressure vessel with crazy seals for the wires.
Click to expand...
What happens if that vacuum breaks catastrophically?

Don't misunderstand me, I would love to see this done, but the practicality of it is nill to me..(but its also not for me, nor my time, effort, and money. :)).
 
ATMINSIDE said:
Have fun getting the permits :)
Click to expand...

I'll do it at my cabin in Maine :)

Maine Revised Statutes
§15102. Exemptions
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.
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2. Pressure vessels. This chapter does not apply to:
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J. Pressure vessels that do not exceed:
(1) Five cubic feet in volume and 250 pounds per square inch gauge pressure;
(2) One and 1/2 cubic feet in volume and 600 pounds per square inch gauge pressure; or
(3) An inside diameter of 6 inches with no limitation on pressure; or [2003, c. 204, Pt. G, §1 (AMD).]​
 
Doesn't mean you'll find somewhere to sell the refrigerant and gauges to you
 
I dunno... A chilled water loop sounds a lot less expensive and less risky right about now eh?
 
ATMINSIDE said:
Doesn't mean you'll find somewhere to sell the refrigerant and gauges to you
Click to expand...

I'd have one of the HVAC techs I work with help me charge the rig.

I'm thinking making wiring penetrations through the steel that won't leak refrigerant may be a show stopper.

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Silver_Pharaoh said:
I dunno... A chilled water loop sounds a lot less expensive and less risky right about now eh?
Click to expand...

I guess I need to rename the project again. What do you think of "Widow Maker"? :)
 
I think that you should go ahead and do the testing for this and give it a try.
I also think you should build your sons computer first. I have a feeling that by the time all the bugs are worked out of this system it will be ready for him to play Battlefield 14.:D
 
CraigRochester said:
I'd have one of the HVAC techs I work with help me charge the rig.

I'm thinking making wiring penetrations through the steel that won't leak refrigerant may be a show stopper.

- - - Updated - - -



I guess I need to rename the project again. What do you think of "Widow Maker"? :)
Click to expand...

It will have to be hard line with a brazed connection, most likely.

Also, where's your phase change going to happen? It needs to be a refrigerant loop of some sort as phase change is how refrigerant cools.
 
ATMINSIDE said:
It will have to be hard line with a brazed connection, most likely.

Also, where's your phase change going to happen? It needs to be a refrigerant loop of some sort as phase change is how refrigerant cools.
Click to expand...

I'm looking into something like a "flooded barrel" chiller; where the bathtub is full (w/ head space) of R-410A. I'm still studying this system to understand the HT, but the phase change occurs in the head space where a float valve maintains vapor above a fixed level. I have no idea how I'd get all the HDMI, USB, etc connectors' penetrations through.

flooded-liquid-chiller.jpg
 
Careful with 410A... That crap needs some serious pressure just to cool stuff.
Personally, I'd look to use R134a but it's getting hard to find.

My dad still has 20lbs of R22A. That stuff cools real well :)
 
Silver_Pharaoh said:
Careful with 410A... That crap needs some serious pressure just to cool stuff.
Personally, I'd look to use R134a but it's getting hard to find... :)
Click to expand...

I like the lower boiling point of R-410A @ -48C, R-134A is -26C (Amazon- R-134a Cylinder - 30 lb. $97). R-410A is common in window A/C units where I'll be able to get the compressor and condenser coil easily/cheaply.

Yes the box design will need to be about 350 psi (@ 100F) to not blow a safety relief. This pressure is getting out of my comfort zone and may be moot, as I can't see any practical way to get the ports out of the box.
 
CraigRochester said:
I like the lower boiling point of R-410A @ -48C, R-134A is -26C (Amazon- R-134a Cylinder - 30 lb. $97). R-410A is common in window A/C units where I'll be able to get the compressor and condenser coil easily/cheaply.

Yes the box design will need to be about 350 psi (@ 100F) to not blow a safety relief. This pressure is getting out of my comfort zone and may be moot, as I can't see any practical way to get the ports out of the box.
Click to expand...

Wonder if there is another refrigerant out there that will work without huge pressure?
I'm not sure, but maybe mix some 134a into the 410a? That even allowed?
Seem they don't mix. huh.
 
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