Freon Base Cooling

[wolfsid]

OK GUYS I just found a old fridge that someone trew out and i am thinking about using the compressor in it to cool the the cpu and motherboard if possible.. My question is does the size of the compressor really matter alot on the cooling or can you just get any size to do the job.. What would be the best size? I was thinking of going to home depot and getting some copper tubing to mod it close to the inlet and outlet of the Block and then i am going to add flexable freon hoseing to the block so that way i don't need to worry about anything breaking from moving it all the time.. Someone get back to me on this and tell me what do you think about the project.:burn:

[Tiger]

I am busy reseaching this very thing at the moment. Most domestic refrigeration units should be able to handle such a task with ease. The problems only just begin there though. There are critical relationships between compressor power/gas pressure/type of refrigerant/condenser size/evaporator size etc etc. The key would be to measure the volume of the evaporator then replicate this volume in a new custom made evaporator. Then regas with probably R134A refrigerant.

[Samzik]

i have a friend who did use freon cooling with np exept he burned couple of cpus after that hes in water cooling biznez... enyway
the size (not size realy but the power of the electrical engine) makes the difrents. if u use biger engine (from biger fridge ) it will keep ur system colder in idle, if u know what i mean. i think the peak of freon is -47 or something but he got -35 idle so. if u have biger electrical engine (i mean more power) u get lower ide temp, if u have les power idle will be lower and depends how many components u need to cool down and how hot they get. more components like u vana get cold mem and graphics it drains more power from engine.

i Can provide the link where is the system in pics but im sorry its estonian page (info from me if anything is specialy intresting)

here it comes :Freon cooling (http://www.hot.ee/karlov/)

[wolfsid]

OK well Here is some pictures of the compressor the rest of the parts... C:\Documents and Settings\Administrator\My Documents\Picture 2.jpg I will try to give a step by step project with both pictures and directions...

[ptcg]

You'll need to figure out how much heat is going to be put out by the parts you are going to cool and make sure the compressor can handle that. In my setup, I'm only cooling the CPU. Mine throws off approx. 110Watts.. Multiply that by about 3.5 to get BTUs, and mine is doing under 400BTUs.. From what I've been told, my compressor can handle approx. 3000BTUs, so it's more than adequate.

Next, you need to get a nicely balanced system. (As Tiger said, many factors will affect each other.. Evap size, condensor size, etc..)

What you want to try to do is have a condensor large enough, that it will be able to remove as much heat as possible from the compressed refrigerant. This will enable the evap to run as cold and as efficiently as possible..

Next, you need to have an evap that can disperse and absorb the heat generated by whatever you are cooling. (Too small & it won't be able to handle the heat.. Too big & it'll freeze-up)

If you system is designed right, you should be able to hit below 0C with ease..

One thing to watch out for: ALL of the refrigerant entering the evaporator MUST be boiled-off.. If any liquid refrigerant returns to the compressor, you can seize it. Running too cold can cause this (the return line will get frost on it.. not good)

Also, if you run too warm, you can burn out the compressor.. In my setup, the evap runs about 7C under 100% CPU load.. Not too cold, not too warm..

Your best bet is to find an HVAC tech you can talk to.. Someone who can guide you to get a balanced system.. I talked to several people who have been working with refrigeration for many years. The help was invaluable.

You can check out my website for details on how I did mine. (In my profile)

[wolfsid]

man dude nice page i remember reading that about 4 months ago that is what got me into building my own phase change unit.. Ok i see no refill val on my compressor is that bad or can i just add one.. also i was thinking about using the old maze 2 block i have and mod that to be my evaporator.. What do you think about that idea good or bad.. Also I think that the compressor might be a little small so i might have to upgrade in that.. have you tried to split the tubing and cool both motherboard and cpu by one compressor.. that is my plan just wanted to know if you think it will work.:D

[ptcg]

By cooling the motherboard, do you mean the northbridge? I don't think it gets hot enough to make phase change necessary.. Just one more thing to insulate.

I thought about sending a second line down to the video card to cool the GPU and video memory.. Too much of a hassle though. I might make a huge aluminum heatsink to cover the GPU & memory together & put a 60MM fan on it instead.

You'll need to do some math to figure out if your compressor is too small. As I said, mine can handle up to 3000BTUs and it's only 6" diameter.. I think really, the smaller the better.. less power consumption. It just has to be a well designed setup and there should be no problem. Do a lot of research before committing to a design.

[wolfsid]

Yes i think cooling the motherboard chipset it good i put a 75 watt pelter and a waterblock with cold plate it look crazy and the temp was at 15c and i notice a difference i could overclock fsb more and it would be stable.. and i know that if you have both cpu and chipset cold that you can get a better overclock.. but if it was possible i would use it for my video card also but i know that is alot of work and almost a waste of work if you don't cover both gpu and ram but that is just my idea... I am kinda a hardcore overclocker without all the resources..

[UserName]

there is usualy a metal plate on the compressor that will tell you the BTU load it can handle. Also if you cool the condenser you will get cooler temps.

[Samzik]

Originally posted by ptcg

Next, you need to have an evap that can disperse and absorb the heat generated by whatever you are cooling. (Too small & it won't be able to handle the heat.. Too big & it'll freeze-up)


One thing to watch out for: ALL of the refrigerant entering the evaporator MUST be boiled-off.. If any liquid refrigerant returns to the compressor, you can seize it. Running too cold can cause this (the return line will get frost on it.. not good)

You can check out my website for details on how I did mine. (In my profile)

hers one thing ur wrong about. u cant freez freon if u use compressor system without seperate freezer, due the system in fridege works like this : the freon is in gas state the compressor makes it wet (compresis it ) and it gets cold (due compresing like LN2, and there where u wana freez get rid of the cold of froen ( i mean like giwe the cold away) the fron goes to gas state agen and the compressor has to make it to wet(cold) state agen this is teh general idea! i have to check how to explain better i look for manual from i net if i find let u all know this is best explanation i can give right now.(due im not engl speeking person)

[Tiger]

Originally posted by Samzik


hers one thing ur wrong about. u cant freez freon if u use compressor system without seperate freezer, due the system in fridege works like this : the freon is in gas state the compressor makes it wet (compresis it ) and it gets cold (due compresing like LN2, and there where u wana freez get rid of the cold of froen ( i mean like giwe the cold away) the fron goes to gas state agen and the compressor has to make it to wet(cold) state agen this is teh general idea! i have to check how to explain better i look for manual from i net if i find let u all know this is best explanation i can give right now.(due im not engl speeking person)
Sorry you don't undrestand the refrigeration process. I have a basic guide in the article that I wrote;
http://www.overclockers.com/tips777/
The basic route is; gas -compression - hot gas - heat removal and condensation to liquid (condenser) at low pressure (regulator valve) - liquid injected through a capillary into evaporator - liquid boils (absorbing heat i.e. phase change in evaporator) - back to gas.

[Samzik]

oki bno further junk from me i have to check this to know what im talking about oki i do some reserch. il get back to ya but im thinking how u can condensate the gas in low presure (what u mean by low? )