Question's on Scroll Compressor's

[NidStyles]

I have found a pretty good deal on a 35K-40K BTU scroll compressor. Now I know some of you would say it's slightly overkill for a PC, but that's the nature of the site. I do intend to pick up this pump if you guy's say it's good.

Question's:

1. What are the biggest issue's I would have to be concerned with scroll compressor's in general? Like what to look out for when setting the system up?

2. Have any of you had any serious experience with the Copeland ZR40K3-PFV compressor?

3. What is the rated idiot proof level of using one of this comps on a 1-10 scale, with 1 being near Darwin Award level?

semi-related--

4 Has anyone here ever worked with liquid Helium as the medium?

5. If you have worked with Helium, what are the concerns, other than death...?

If you have worked with Helium, or you have some insight on working with it, please do share. I am interested in trying my hand at some DIY Cryogenics without freezing my arm off, or something crazy like that.

Just a note. i am aware the pump i mention is not be up to the task of going cryo, or even pumping Helium, but I'm asking about it because I need to gain as much awareness before I do something Darwin like. This is a long term project, so I have patience and time.

[lesstutrey]

Originally Posted by NidStyles

I have found a pretty good deal on a 35K-40K BTU scroll compressor. Now I know some of you would say it's slightly overkill for a PC, but that's the nature of the site. I do intend to pick up this pump if you guy's say it's good.

Question's:

1. What are the biggest issue's I would have to be concerned with scroll compressor's in general? Like what to look out for when setting the system up?

2. Have any of you had any serious experience with the Copeland ZR40K3-PFV compressor?

3. What is the rated idiot proof level of using one of this comps on a 1-10 scale, with 1 being near Darwin Award level?

semi-related--

4 Has anyone here ever worked with liquid Helium as the medium?

5. If you have worked with Helium, what are the concerns, other than death...?

If you have worked with Helium, or you have some insight on working with it, please do share. I am interested in trying my hand at some DIY Cryogenics without freezing my arm off, or something crazy like that.

Just a note. i am aware the pump i mention is not be up to the task of going cryo, or even pumping Helium, but I'm asking about it because I need to gain as much awareness before I do something Darwin like. This is a long term project, so I have patience and time.

How much does that thing weigh, at that kinda BTU it's gotta be an insane weight and a rotary would make more sense... I mean, the last 40k BTU scroll compressor i saw was in the 1 ton range..

[NidStyles]

Originally Posted by lesstutrey

How much does that thing weigh, at that kinda BTU it's gotta be an insane weight and a rotary would make more sense... I mean, the last 40k BTU scroll compressor i saw was in the 1 ton range..

Good deal. i didn't even read into that.

Any suggestions on a good compressor in that BTU range?

[MeltedDuron]

My LG 34000 BTU was around about 30KG, nice a compact so was dead easy to lift

[NidStyles]

Originally Posted by MeltedDuron

My LG 34000 BTU was around about 30KG, nice a compact so was dead easy to lift

You have a model number on that one?

[sdumper]

Originally Posted by NidStyles

I have found a pretty good deal on a 35K-40K BTU scroll compressor. Now I know some of you would say it's slightly overkill for a PC, but that's the nature of the site. I do intend to pick up this pump if you guy's say it's good.

Question's:

1. What are the biggest issue's I would have to be concerned with scroll compressor's in general? Like what to look out for when setting the system up?

2. Have any of you had any serious experience with the Copeland ZR40K3-PFV compressor?

3. What is the rated idiot proof level of using one of this comps on a 1-10 scale, with 1 being near Darwin Award level?

semi-related--

4 Has anyone here ever worked with liquid Helium as the medium?

5. If you have worked with Helium, what are the concerns, other than death...?

If you have worked with Helium, or you have some insight on working with it, please do share. I am interested in trying my hand at some DIY Cryogenics without freezing my arm off, or something crazy like that.

Just a note. i am aware the pump i mention is not be up to the task of going cryo, or even pumping Helium, but I'm asking about it because I need to gain as much awareness before I do something Darwin like. This is a long term project, so I have patience and time.

So I am assuming this is intended for an anchor on a large cascade of 3 or more stages right?

[SexyMF]

http://www.youtube.com/watch?v=wB0JodKgZ0A

You want to do liquid helium cooling?

[sdumper]

Hey thats very cool! I havent seen that video before.

[ultralo1]

Cool link, Didnt know what I was looking at but cool.

Liquid helium is expensive what are you thinking of doing?

[[XC] gomeler]

Highly wasteful example of using LHe4 for computer cooling. I saw them use it in Austin and it is a riot to watch and mind boggling to think of the amount of money literally evaporating away.

[MeltedDuron]

LG HQ034PAA

Scroll (R407A), 30,000 btu/h at 60 Hz, P=1PH, 220/240V 50 Hz





It needs a 60uf capicitor and some rubber feet. Is missing the cover and it got a knock when being delivered. Yet to find a use for it. Was thinking auto c.

[NidStyles]

^^ Nice.

Originally Posted by sdumper

So I am assuming this is intended for an anchor on a large cascade of 3 or more stages right?

Not really. I had another idea.

[MeltedDuron]

Originally Posted by NidStyles

^^ Nice.

She be big, duno why i bought it as im not going to use it i think.

[NidStyles]

Originally Posted by MeltedDuron

She be big, duno why i bought it as im not going to use it i think.

So let me make the logical jump, that you'd be willing to part with this compressor then, right? You're in the UK though, right?

[MeltedDuron]

Originally Posted by NidStyles

So let me make the logical jump, that you'd be willing to part with this compressor then, right? You're in the UK though, right?

Carefull dude, this is on the breach of the rules. I'll PM you now

[ruffus]

well i would love to see what u do here as i have 3 of those compressors but 1 of them is even biger then yours it is a 2 tone unit i was thinking of makeing a autocascade from it for my self as i have both 120v and 220v in my benching room then if i wanted i could go with useing it as a first stage (but still have it as a autocascade) on a cascade as i have 2 12000 btu rotorys that i could use for second and third stages. wish i lived in the UK as i can get lots of these scroll compressors and would be willing to give or sell real cheap even if someone wanted one or 2

[MeltedDuron]

Originally Posted by ruffus

well i would love to see what u do here as i have 3 of those compressors but 1 of them is even biger then yours it is a 2 tone unit i was thinking of makeing a autocascade from it for my self as i have both 120v and 220v in my benching room then if i wanted i could go with useing it as a first stage (but still have it as a autocascade) on a cascade as i have 2 12000 btu rotorys that i could use for second and third stages. wish i lived in the UK as i can get lots of these scroll compressors and would be willing to give or sell real cheap even if someone wanted one or 2

They aint cheap nor that comen in the UK. Fact there is not a lot at all in the UK cheap for this style of cooling. Admitly ebay has gotten a little better recently as there are a lot of Danfoss SC18 and 21's on ebay for about £50. Thats about it, no gas, gauges, filters, oil seps, expansion tanks etc

[ruffus]

Originally Posted by MeltedDuron

They aint cheap nor that comen in the UK. Fact there is not a lot at all in the UK cheap for this style of cooling. Admitly ebay has gotten a little better recently as there are a lot of Danfoss SC18 and 21's on ebay for about £50. Thats about it, no gas, gauges, filters, oil seps, expansion tanks etc

well if u ever want one and u don't mind paying the shipping the ones i have are 60hz/50hz so u can use them in the UK i would send u one or maybe 2 for free u just pay the shipping but i can tell u they are not light

[MeltedDuron]

Originally Posted by ruffus

well if u ever want one and u don't mind paying the shipping the ones i have are 60hz/50hz so u can use them in the UK i would send u one or maybe 2 for free u just pay the shipping but i can tell u they are not light

I have one but no idea if i want too use it. LOL. I've means to get stuff big and heavy shipped states side for free. It just need to go to indi or ca

[NidStyles]

I want one to build a Von Linde device to make liquid nitrogen. By my rough calculation's anything around 35K-40K BTU should be capable of creating enough vacuum to turn the air into a liquid. The higher side of 40K would be better. From there I have the ability to create even colder, and produce the Helium-3 if need be. Scroll compressor's are the preferred method, as their draw is relatively smooth, and they can provide lasting pressure for longer period's of time. This make's getting down to temperature easier.

Mind you this is a long term goal.

I'm still awaiting to get out of the Army so I can actually build something up in my own space, rather than the Army's housing. I'm looking to acquire some of this stuff in the months following me leaving the Army. It could be anywhere from2-4 months at this point in time.

[MeltedDuron]

Where in the world are you, what part of the army are you in, what country are you in the army for/with? Check ya PM's i sent you one

[chilly1]

Originally Posted by NidStyles

I have found a pretty good deal on a 35K-40K BTU scroll compressor. Now I know some of you would say it's slightly overkill for a PC, but that's the nature of the site. I do intend to pick up this pump if you guy's say it's good.

Question's:

1. What are the biggest issue's I would have to be concerned with scroll compressor's in general? Like what to look out for when setting the system up?

2. Have any of you had any serious experience with the Copeland ZR40K3-PFV compressor?

3. What is the rated idiot proof level of using one of this comps on a 1-10 scale, with 1 being near Darwin Award level?

semi-related--

4 Has anyone here ever worked with liquid Helium as the medium?

5. If you have worked with Helium, what are the concerns, other than death...?

If you have worked with Helium, or you have some insight on working with it, please do share. I am interested in trying my hand at some DIY Cryogenics without freezing my arm off, or something crazy like that.

Just a note. i am aware the pump i mention is not be up to the task of going cryo, or even pumping Helium, but I'm asking about it because I need to gain as much awareness before I do something Darwin like. This is a long term project, so I have patience and time.

1, Large size, noise, starting ( use a potential relay and a 200uF start cap you will need an adjustable universal potential relay because there are none manafacturered for that compressor specifically) the compressor is not designed to start under high torque conditions, rejecting the heat is another issue you will need some form of crankcase pressure regulation if you use R507 or simmilar gas, running a scroll under low pressure conditions will make it lose lubrication you will also need to add an oil seperator with a 140 inch 0.031 capillary for constant oil return as well as compressor cooling, install this about 1/3 of the way through the condenser, also scrolls get real hot supplemantary shell cooling will help performance.
2,the zr 40 is a refrigeration scroll and usually runs in suction pressures of 30 to 70 psi I have found that when they are run in low temperature systems with suction pressures under 10 psi the check valve will not close and the compressor with spin backwards arter shut down, this is a problem if the compressor is started up immediatly... it will cause damage.
3,. always install the cover over the terminals as they can blow out arc and burn the oil resulting in a 4 to 5 foot flaming stream of hot oil,, seen it... on a rooftop condenser.
4,. Liquid helium has very little heat content as compared to Ln2.
harder to handle and can be more dangerous, you will need to use a feeder system as you cant fill a dewer fast enough...
5, helium being a smaller Molcoule than Nitrogen can enter the bllod stream from simple contact, this can cause brain embolism simmilar to the bendz divers get.
Helium cryp pumps use helium as a working fluib, this fluid does not go to liquid in the pump itself and only momentarily in the head, in the cryo head there is either a single or two stage stirling engine that utilizes the helium as the heat transfer medium, it is driven using advanced magnetics better to shoot for -160 to -220 with compound autocascades

[sdumper]

Originally Posted by chilly1

1, Large size, noise, starting ( use a potential relay and a 200uF start cap you will need an adjustable universal potential relay because there are none manafacturered for that compressor specifically) the compressor is not designed to start under high torque conditions, rejecting the heat is another issue you will need some form of crankcase pressure regulation if you use R507 or simmilar gas, running a scroll under low pressure conditions will make it lose lubrication you will also need to add an oil seperator with a 140 inch 0.031 capillary for constant oil return as well as compressor cooling, install this about 1/3 of the way through the condenser, also scrolls get real hot supplemantary shell cooling will help performance.
2,the zr 40 is a refrigeration scroll and usually runs in suction pressures of 30 to 70 psi I have found that when they are run in low temperature systems with suction pressures under 10 psi the check valve will not close and the compressor with spin backwards arter shut down, this is a problem if the compressor is started up immediatly... it will cause damage.
3,. always install the cover over the terminals as they can blow out arc and burn the oil resulting in a 4 to 5 foot flaming stream of hot oil,, seen it... on a rooftop condenser.
4,. Liquid helium has very little heat content as compared to Ln2.
harder to handle and can be more dangerous, you will need to use a feeder system as you cant fill a dewer fast enough...
5, helium being a smaller Molcoule than Nitrogen can enter the bllod stream from simple contact, this can cause brain embolism simmilar to the bendz divers get.
Helium cryp pumps use helium as a working fluib, this fluid does not go to liquid in the pump itself and only momentarily in the head, in the cryo head there is either a single or two stage stirling engine that utilizes the helium as the heat transfer medium, it is driven using advanced magnetics better to shoot for -160 to -220 with compound autocascades

Man its good to have you back!!!!

[ruffus]

sorry for high jacking your thread i just need to ask chilly this. Is what u say here (you will also need to add an oil seperator with a 140 inch 0.031 capillary for constant oil return as well as compressor cooling, install this about 1/3 of the way through the condenser, also scrolls get real hot supplemantary shell cooling will help performance.) the way i would use any non-floated oil sep in any cascade. just because i have 2 non-floated ones that i would like to use but don't want to just use a valve

[NidStyles]

^^^ GET YOUR OWN THREAD, OR PM HIM!!! Damn turd.

Chilly1 - Mind if I send you a PM to pick your brain some? I am quite competent with Thermo, but primarily the higher range of temp's. I majored in Physics with a focus on Cosmology, so I have some understanding on how thing's should work.

Originally Posted by MeltedDuron

Where in the world are you, what part of the army are you in, what country are you in the army for/with? Check ya PM's i sent you one

I'm currently in upstate New York. A place called Fort Drum, otherwise known as hell on earth. Yes it seem's like a joke, but until you are out in the sub-zero degree weather for week's for "Cold-Weather Training", you wouldn't understand.

I'm an 11B. That's an Infantryman for those less aware. I wouldn't give this job up for anything, but I'm unable to do it anymore physically. It's takes it's toll on your body, and now I'm too injured to keep doing it, and there's no other job in the Army I'm interested in. So they are "Medically Retiring" me. Means they can't use me anymore, LOL!

I replied to your PM, sorry it took me so long, but these day's I find myself more interested in sleeping after work than typing.