What would it take to build a cryogenic cooler?

[wdrzal]

You do know that presure/enthalpy chart & diagram you posted is for supercritical/transcritical CO2 system...........don't you??????? IIRC the critical pressure is around 1070 psig for scCO2.

[Shingoshi]

You do know that presure/enthalpy chart & diagram you posted is for supercritical/transcritical CO2 system...........don't you??????? IIRC the critical pressure is around 1070 psig for scCO2.

You should tell the person who originally posted it!
The original post

Shingoshi

[wdrzal]

The post right before I made yours........Ruffus's Thread go look. NICE JOB and NICE CLOCKS

You mentioned you wanted 200 psi for a high pressure but post supercritical/transcritical systems where the high side can be 1400 to 2000 psi with a 500 psi low side.

[Shingoshi]

The post right before I made yours........Ruffus's Thread go look. NICE JOB and NICE CLOCKS

You mentioned you wanted 200 psi for a high pressure but post By the way supercritical/transcritical systems where the high side can be 1400 to 2000 psi with a 500 psi low side.

It would really help if you stated precisely (with a link to) which post you are referring to at the time you make a statement. That way there wouldn't be this kind of confusion. Since this has pretty much become my thread, I automatically thought you were being critical of me. I simply copied someone else's post here. And in doing so, there's a link to it for everyone to follow back to the original post. If you mention someone else's post/thread, please post the link to it as well.

Thank you,
Shingoshi

[wdrzal]

Shingoshi it was already pointed out people don't want to chase links wasting there time. I would like to see you build a unit that works....... really

Maybe 2 or 3 compressors and shoot for - 80 or -90 with a load.

With all those compressors I don't think you realize how technically difficult you proposed build is,especially for a first build. How are you going to reject all that "heat of compression" from those !

[Charles Wirth]

Shingoshi, did I meet you in Oregon? Harmonic Phase Separation? When I saw it, I recognized it as just a vortex tube (seeking mass funds) and never heard from them again.

I have one of these. Going on my next cascade.


I own a working helium unit.

[clear cmos]

Shingoshi, did I meet you in Oregon? Harmonic Phase Separation? When I saw it, I recognized it as just a vortex tube (seeking mass funds) and never heard from them again.

I have one of these. Going on my next cascade.


I own a working helium unit.

thanx, nice sharing

that coiled tube must the evap

[SoddemFX]

that coiled tube must the evap

It is a suction accumulator with a built in liquid line subcooler, the liquid line is fed through the coil.

The J-pipe is used to prevent liquid refrigerant from returning to the compressor. Not visible in the picture is the small (sub-millimeter) hole at the bottom of the J-pipe which allows oil to return to the compressor instead of building up in the accumulator.

Tom

[[XC] gomeler]

It is a suction accumulator with a built in liquid line subcooler, the liquid line is fed through the coil.

The J-pipe is used to prevent liquid refrigerant from returning to the compressor. Not visible in the picture is the small (sub-millimeter) hole at the bottom of the J-pipe which allows oil to return to the compressor instead of building up in the accumulator.

Tom

Never seen one of those before but that is what I thought it was also. Very interesting accumulator, are those available on the market?

[Shingoshi]

Never seen one of those before but that is what I thought it was also. Very interesting accumulator, are those available on the market?

If some of you didn't have PROBLEMS following the links I've provided (sometimes with images) you would have found the website for which each of the products can be found. And since I'm pretty certain that I provided the link for this accumulator's webpage, I'm not giving it again!

Best of luck!
Shingoshi

[[XC] gomeler]

If some of you didn't have PROBLEMS following the links I've provided (sometimes with images) you would have found the website for which each of the products can be found. And since I'm pretty certain that I provided the link for this accumulator's webpage, I'm not giving it again!

Best of luck!
Shingoshi

1) You link way too often to random stuff.

2) NEVER link with images unless it is a link to a higher-quality image.

3) There is no need to get upset.

edit: Link to the accumulator shown above.

http://www.rparts.com/Catalog/Major_...cumulators.asp

How hard was that? Even a polite "please view post #xxx" would have been helpful. Don't treat everyone as an opponent of your work.. I'm one of the few that is actually genuinely interested in it.

[Shingoshi]

1) You link way too often to random stuff.

2) NEVER link with images unless it is a link to a higher-quality image.

3) There is no need to get upset.

edit: Link to the accumulator shown above.

http://www.rparts.com/Catalog/Major_...cumulators.asp

How hard was that? Even a polite "please view post #xxx" would have been helpful. Don't treat everyone as an opponent of your work.. I'm one of the few that is actually genuinely interested in it.

I was bidding on an essential piece of equipment on Ebay, only to have the "reserve not met" as the result. I was the only one who bid on it. So if it was so valuable, someone else should have thought so too. Instead, it sat for days with no activity. And this was something that I really needed. So I was still pissed at the time I wrote that.

On the other hand, I don't know why some find it too difficult to simply run their cursors over images or links to see where they might lead. I have to do that all day when I'm searching for product information. And I'm not complaining to anyone about it. Most of the time when you look at a page of grouped products, the thumbnail image of each item is usually the link to the specifications of that product. It's just something I've come to expect. So I didn't think it should be an issue for anyone who really wanted to know something.

EDIT: And I'm genuinely sorry. Because I've come to realize that you have indeed been in my corner, so to speak. You're the last person I really want to piss off. Please forgive the insult. Man, I really wanted that Leica component!

EDIT: I don't feel so bad now!! I got another Leica component to replace the one I wanted. And it has more of what I needed! Small miracles can come in small packages.

Shingoshi

[SoddemFX]

Never seen one of those before but that is what I thought it was also. Very interesting accumulator, are those available on the market?

Yes, they are cheap too. The reason thay are cheap is because they are easy to make and subsequently not terribly effective as a suction line heat exchanger.

It could be argued that any suction line accumulator is in itself a stop-gap soloution for a problem which shouldn't exist.

Tom

[Shingoshi]

Yes, they are cheap too. The reason thay are cheap is because they are easy to make and subsequently not terribly effective as a suction line heat exchanger.

It could be argued that any suction line accumulator is in itself a stop-gap soloution for a problem which shouldn't exist.

Tom

Would you please explain why these are ineffective, and why it's a solution for a problem that shouldn't exist?

Shingoshi

[[XC] gomeler]

Yes, they are cheap too. The reason thay are cheap is because they are easy to make and subsequently not terribly effective as a suction line heat exchanger.

It could be argued that any suction line accumulator is in itself a stop-gap soloution for a problem which shouldn't exist.

Tom

Well I was looking at it as purely a SLHX for a project I'm stuffing together. Original plan is a 10 plate HX and I don't think that'll change at $30/pop

[Charles Wirth]

Asking again.

Shingoshi, did I meet you in Salem Oregon? Harmonic Phase Separation? When I saw it, I recognized it as just a vortex tube (seeking mass funds) and never heard from them again.

[Shingoshi]

And it might be important.

As many of you have already gathered, I do a lot of online research. I don't buy anything without first doing exhaustive research to have some idea of what my options are. And in the process of doing this, I've come across something really interesting.

As it turns out, processors aren't the only chips that benefit from cooling.

Low Light and Long Exposure Times (Cooled CCD)
INFINITY3 cameras are cooled to 25ºC below ambient to reduce dark
current noise to a negligible level. This results in a 50% decrease in
dark current noise for every 6 to 8ºC in temperature below ambient.

Yes guys, I'm talking about cameras here. I was looking for a sensor head to attach to the optics I've been purchasing lately. And while doing so, I came across this company called Lumenera. They specialize in medical and industrial cameras. And most of them use USB as the interface and C-mounts for their lenses.


Finally, there may be a real application for the private development of extreme sub-cooling as envisioned by this project/thread. If I/we can prove that such systems are capable of practical 24/7 use, I/we will have an important point for others to observe. And the nice thing about it, cameras don't produce a lot of heat compared to processors. Most of you already have built systems that would produce tremendous results for low-temperature applications. What most of you do for fun, doesn't have to strictly be a hobby. Think about that...

Xavian-Anderson Macpherson
ShingoshiDao

[eligray]

Hey Shingoshi-

Can you please give a simple overview of how you're envisioning this system? As in listing the components of each stage, and refrigerants at each stage. This will help people get what your thinking is, as I'm sure that I'm not the only one here who doesn't see how you plan to fit

[Charles Wirth]

Thread closed.