Going to build a phase change..need help on choosing a compressor - Overclock.net

TERAHERTZ · 06-15-09

im going to build a phase change unit been contemplating doing this for a awhile im very good with my hands and i have more then enough tools for the job im also in my mid 20,s lol so this isnt a noob kid here asking dumb questions..im dead set on building a phase..i have company card for home depot so i can buy most of the parts to build the unit through them "for free"..i also have every tool needed i just have a few questions (1) should i build single stage to keep things simple since its my first build ? would 2 phase be better (2) how big of a compressor do i need and what kind ? (3) what kind of temps should i expect how low do i want to go? as far as temps i heard i7 has a cold bug..and does any one have a link to a good guide with pics to show me how to build a phase (ive been reading a lot here and there over last few months but im just not confident that i know enough yet to build one.. and last this is going to need to be a beefy unit because im going to use it on my i7 ...any info would be helpful thanks

NoL · 06-15-09

Let's see, first off, age has nothing to do with it.
You might be surprised how some of the older guys here don't always know everything, and you'd be surprised how young someone like me might be.

1) Before you go trying to roast up an i7, it isn't an easy thing for an accomplished builder. The limitations of our evaporators and our systems in general, do not make holding 250W to 300W an easy feat, you might consider trying to get a basic system down first, 150W to 200W load or just get it up and running.

2) Compressor size in part helps to determine your net temperature, but is not alone in that. Therefore it depends on what your goals are. -40C for instance might require a SC18CLX.2 as can be bought on ebay right now fairly cheap, but that is a huge compressor, and requires a very large condenser and other work as well. But if -10C is good for you, then maybe an NF9FX or less will be suitable.

3) Doubt you'll hit a coldbug on a single stage for i7.

ltulod · 06-15-09

Quote:

Originally Posted by NoL

Let's see, first off, age has nothing to do with it.
You might be surprised how some of the older guys here don't always know everything, and you'd be surprised how young someone like me might be.

1) Before you go trying to roast up an i7, it isn't an easy thing for an accomplished builder. The limitations of our evaporators and our systems in general, do not make holding 250W to 300W an easy feat, you might consider trying to get a basic system down first, 150W to 200W load or just get it up and running.

2) Compressor size in part helps to determine your net temperature, but is not alone in that. Therefore it depends on what your goals are. -40C for instance might require a SC18CLX.2 as can be bought on ebay right now fairly cheap, but that is a huge compressor, and requires a very large condenser and other work as well. But if -10C is good for you, then maybe an NF9FX or less will be suitable.

3) Doubt you'll hit a coldbug on a single stage for i7.

now, if you apply what you know here at school.......

NoL · 06-15-09

You get some interesting results. But maybe to my age, the mystery poll on my age is still out. It's nice to know some of you seem to think I'm younger, and sometimes its nice to hear that people think I should be shopping for a "permanent" plot of land.

TERAHERTZ · 06-15-09

Quote:

Originally Posted by NoL

Let's see, first off, age has nothing to do with it.
You might be surprised how some of the older guys here don't always know everything, and you'd be surprised how young someone like me might be.

1) Before you go trying to roast up an i7, it isn't an easy thing for an accomplished builder. The limitations of our evaporators and our systems in general, do not make holding 250W to 300W an easy feat, you might consider trying to get a basic system down first, 150W to 200W load or just get it up and running.

2) Compressor size in part helps to determine your net temperature, but is not alone in that. Therefore it depends on what your goals are. -40C for instance might require a SC18CLX.2 as can be bought on ebay right now fairly cheap, but that is a huge compressor, and requires a very large condenser and other work as well. But if -10C is good for you, then maybe an NF9FX or less will be suitable.

3) Doubt you'll hit a coldbug on a single stage for i7.

much thanks for the info..looks like im gona want to go with the danfoss sc18clx.2 because -10c isnt enough lol ...do you know what the power consumption that compressor is ? and how big a condenser i,ll need to use

NoL · 06-15-09

Check its chart, expect over 400-500W pretty quick.
Condenser is going to need to be very big, 1kw minimum.
Those ebay danfoss don't come with powersetups either, and are a mixed batch, expect the electronics to ring up round $70.
Going big isn't easy though; it can make tuning alot harder as well.
I think your asking for trouble if you try and go this big this early.

TERAHERTZ · 06-15-09

Quote:

Originally Posted by NoL

Check its chart, expect over 400-500W pretty quick.
Condenser is going to need to be very big, 1kw minimum.
Those ebay danfoss don't come with powersetups either, and are a mixed batch, expect the electronics to ring up round $70.
Going big isn't easy though; it can make tuning alot harder as well.
I think your asking for trouble if you try and go this big this early.

yea it sounds like your right..and wow is 500w a lot i want to build something i can use 24/7 so im going to have to go with something smaller..my uncle works as a maint man..hes brining home 5 ac window units which still work but there not blowing cold the way they used to so im going to pull a radiator for my phase unit from one of them and i guess i,ll pull some filter dryers also can i use more then one filter dryer can i daisy chain 2 or even 3 of them to make up for size? also the compressor,s are way to small correct?...im hoping i can scrap the parts i need from these ac,s and buy a compressor and some copper tubing from home depot to build the unit i know people in the ac field who i can to charge the unit for free so im good there also..im trying to be cost effective...and again thank your a real asset

.. also thanks for the offer on the compressors but i have a company home depot card i can charge any thing i want to it the company pays the bill so im going try and order a compressor from them if its possible..its not a big deal when the average bill on the card is like 5 grand a month

NoL · 06-15-09

Condensers, not radiators. The condensers from an AC unit will be more then enough, and the compressors will be pretty big as well. You can daisy chain filters, but you can't re-use them. Once they get in contact with air for a prolonged period of time they're also ruined.

TERAHERTZ · 06-15-09

so you say the compressors might be big i think my uncle said a few of the windows units were large..whats the smallest i should go for..do i wan t to look at HP or BTU,s..if i can pull anything below sub zero at full load i would be satisfied...only problem im running into now is the cpu evaporator block im thinking i should buy a pro made block to get the best temps from my unit...what do thing about this one its only $50 http://images.google.com/imgres?imgu...BeiHtgek9oG4CQ ....im also thinking about poppong the copper core out of my stock intel i7 heat sing its got a huge core in it but im just not sure how i would go about making a evap block from it...i have a lot tools at my disposal though so it is possible

Evocarlos · 06-15-09

building a ss is easy
getting it to work how you want is much of a diffrent matter

there are plenty of guides floating about the web
as i7 aint as hot as most old p4s a well built nl11f will keep an i7 at bay around -40 -35

and most people say bigger is better i have seen no diffrence from using an 7000btu comp and a 12000btu comp just that the 12k uses more elec

most sinlge stage units are small quite units for 24/7
but for benching a roto single stage is the way forward
an old a/c unit can be made in to a nice little ss for very little cost...

carl..

06-15-09	#2 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	Let's see, first off, age has nothing to do with it. You might be surprised how some of the older guys here don't always know everything, and you'd be surprised how young someone like me might be. 1) Before you go trying to roast up an i7, it isn't an easy thing for an accomplished builder. The limitations of our evaporators and our systems in general, do not make holding 250W to 300W an easy feat, you might consider trying to get a basic system down first, 150W to 200W load or just get it up and running. 2) Compressor size in part helps to determine your net temperature, but is not alone in that. Therefore it depends on what your goals are. -40C for instance might require a SC18CLX.2 as can be bought on ebay right now fairly cheap, but that is a huge compressor, and requires a very large condenser and other work as well. But if -10C is good for you, then maybe an NF9FX or less will be suitable. 3) Doubt you'll hit a coldbug on a single stage for i7. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-15-09	#4 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	You get some interesting results. But maybe to my age, the mystery poll on my age is still out. It's nice to know some of you seem to think I'm younger, and sometimes its nice to hear that people think I should be shopping for a "permanent" plot of land. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-15-09	#6 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	Check its chart, expect over 400-500W pretty quick. Condenser is going to need to be very big, 1kw minimum. Those ebay danfoss don't come with powersetups either, and are a mixed batch, expect the electronics to ring up round $70. Going big isn't easy though; it can make tuning alot harder as well. I think your asking for trouble if you try and go this big this early. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-15-09	#8 (permalink)
NoL Extreme Cooler Join Date: Jul 2007 Posts: 625 Rep: 120 Unique Rep: 82 Trader Rating: 0	Condensers, not radiators. The condensers from an AC unit will be more then enough, and the compressors will be pretty big as well. You can daisy chain filters, but you can't re-use them. Once they get in contact with air for a prolonged period of time they're also ruined. __________________ http://images.tribe.net/tribe/upload...3-47d49073bb79 Send me your food.

06-15-09	#10 (permalink)
Evocarlos New to Overclock.net Join Date: May 2009 Posts: 16 Rep: 2 Unique Rep: 2 Trader Rating: 0	building a ss is easy getting it to work how you want is much of a diffrent matter there are plenty of guides floating about the web as i7 aint as hot as most old p4s a well built nl11f will keep an i7 at bay around -40 -35 and most people say bigger is better i have seen no diffrence from using an 7000btu comp and a 12000btu comp just that the 12k uses more elec most sinlge stage units are small quite units for 24/7 but for benching a roto single stage is the way forward an old a/c unit can be made in to a nice little ss for very little cost... carl.. Last edited by lemans81 : 06-15-09 at 03:27 PM

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Going to build a phase change..need help on choosing a compressor

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