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Dead horse beatings ensue within. - Page 5

post #41 of 45
Quote:
Originally Posted by NoL View Post

You will not be able to liquify nitrogen.

You forgot August123's 5 stage cascade, he had a bottle of nitrogen gas and managed to produce liquid into a flask.
post #42 of 45
Thread Starter 
Quote:
Originally Posted by NoL View Post

You won't beat the pants off phase change. Your missing that the idea you are seeking to employ will not produce any cooling effect more than simple heat transmission. You will not be able to liquify nitrogen.

I think it was a lot harder for them to do In 1883 with a bunch of glass beakers and a hand driven pump than it will be for me.

And no, you don't get what I'm saying. I'm not setting up a liquid loop. Phase change will be occuring, so you could call it a phase change system, but it'll only be a single stage and it'll work in the same fashion that your house is kept cool. Only I will be using much higher pressures than either AC or PC phase change, which allows for lower temperatures. If someone in your family is a chemist, or an AC repair technician, ask them how it works. Fussing back and forth through text probably isn't going to communicate the idea to you if this isn't easily understandable.
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post #43 of 45
Ganf as an engineer, an HVAC tech, and someone who builds phase units/cascades/autocascades, your missing the boat.


Dualist: He was NOT discussing using a multi stage cascade, but a single stage pusher.


Higher pressures DO NOT let you get more cooling or lower temperatures. The only thing they really give you is a higher density for heat transfer.
Similarly, the liquid nitrogen produced in 1883 produced NO COOLING EFFECT what so ever! At least until they depressurized quickly and got an adiabatic cooling effect.

And again.
Unless you cross the critical point, no matter how much pressure you add, you will not be getting liquid nitrogen.
That is basic science. Look up a PT chart.

614
post #44 of 45
Thread Starter 
Quote:
Originally Posted by NoL View Post

Ganf as an engineer, an HVAC tech, and someone who builds phase units/cascades/autocascades, your missing the boat.
Dualist: He was NOT discussing using a multi stage cascade, but a single stage pusher.
Higher pressures DO NOT let you get more cooling or lower temperatures. The only thing they really give you is a higher density for heat transfer.
Similarly, the liquid nitrogen produced in 1883 produced NO COOLING EFFECT what so ever! At least until they depressurized quickly and got an adiabatic cooling effect.
And again.
Unless you cross the critical point, no matter how much pressure you add, you will not be getting liquid nitrogen.
That is basic science. Look up a PT chart.
614

Phrase I was looking for right there. I'll be depressurizing it over the CPU with an atomizer, pulling the resultant vapor off of the block at much less than atmospheric pressure, pumping it back up in a resevoir with a radiator for dissipating the heat, and sending it back through. Not that complicated is it? The 1883 reference was to the fact that it isn't too complicated to create liquid nitrogen if it was being done in the horse and buggy era, never said it was used as a coolant.

I also did not say that adding pressure alone raises temperatures needed to reduce it to a liquid. You helped me fill in the blank by stating that it gives me a higher density for heat transfer, and thus requires a less elaborate cooling process since it speeds heat transfer up. Right? Difference in temperature needed isn't that significant, but the difference in the cooling apparatus should be quite significant, since I probably won't be able to go with some of the more advanced options on that budget-wise. They can get ridiculous.

Am I making myself clearer or just adding to the confusion? I don't have a lot of time to sit down and pull up references and numbers because I have so much crap on my plate right now between work, finishing my personal PC before I run out of time, setting my brother up for treatment, fighting back the jungle that is becoming my yard (seriously, looked out the window and saw an oak sapling at eye level, have no idea when it started growing there) and someday I'll even get a chance to shave. Starting to look like the unabomber again.
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My Mangled Mess
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post #45 of 45
Your welcome to build it, but that does not match your description so far, and I do not see you getting anywhere near phase change temperatures or even holding the same amount of load.
I await the build.
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