Noise???

[mele]

If have looked and cannot seem to find a naswer to this.

How much louder is a SS phase unit over normal air setup?

Thanks,

Mel

[Seufari]

I just got a Chilly1 unit with an Embraco compressor and its about like my little regridgerator with a medium speed fan.

Coming from my near silent watercooling it is a bit loud but nothing I can't sleep next too...

[LukeXE]

If have looked and cannot seem to find a naswer to this.

How much louder is a SS phase unit over normal air setup?

Thanks,

Mel

It depends on compressor (how loud unit will be), used condenser and refrigerant. Compressor about 1/3HP can be very quiet (Danfoss NL series), smaller condenser = faster fan on it = loud // bigger condenser = smaller and slower fan on it = quiet.
About refrigerant, for sure with R507 or R410a unit will work much louder than with a little bit worse gas, like R22/R290.

A SS with Danfoss NL11F and quiet fan on condenser can be really quiet, like 12V 120mm fan maybe ?

[Marvin]

rotatory compressors are a bit louder, but nothing to much.

[epion2985]

If have looked and cannot seem to find a naswer to this.

How much louder is a SS phase unit over normal air setup?

Thanks,

Mel

That simply depends on the compressor and fans you use. Granted smaller compressors/fans make less noise then bigger more powerful once. Also nicer (often more expensive) compressors/fans make less noise.

If you compare to a window ac I would say its a lot quieter because you don't have a huge loud fan on the evap, nor the condenser for that matter. Also rotary compressors (and this varies) generally run louder and hotter then reciprocating piston once (though can pull a very strong vacuum). Window ac units normally have rotary compressors while with the SS DD pc cooling units people tend to stick to reciprocating piston type because of noise, temperature and size benefits.

[star882]

An Embraco compressor (Shivani informed me that it's a scroll) I'm using for my PC is very quiet. I have to be very close to even hear it. A standard 7200RPM hard drive is somewhat louder.
Overall, it's much quieter than the other PCs in the room. (I actually like my PCs loud (but not annoying - just a soft hum) because they sound more powerful - just like why sports cars tend to be loud!) Using phase change can eliminate the need for fans able to build up high static pressure. (Just use an oversized condenser and fan blade for quietness.)

BTW, in the future, I plan to build an oil-loop cooler to allow one unit to cool many PCs. It's going to be nice with a rotary compressor running - though probably too loud at night. I'll probably soundproof the compressor enclosure and somehow keep the compressor cool. Or I might put the cooler in the closet and use an oil-loop condenser.

[jinu117]

If it's oil-loop (which isn't going to be easy... I warned you... due to heat transfer nature of oil not being as good as water), shove it outside house ;) Eehehe..
Reason most of people stick to reciprocating is due to noise and heat as Epion mentioned. I've yet to see rotary sutiable for 24x7 with reason. Now that scroll compressor do interest me... care to share a little info star?

[star882]

http://www.emersonclimate.com/AcCopeland/ac_quiet_op.htm
They sure are quiet, but I don't know all that much about them.

And yes, oil-loop coolers are much harder to engineer (adds some more thermal interface mediums between the refrigerant and CPU), but they can be reconfigured even while running. I plan to have a large cooler connected to each PC using PEX tubing. When I want to move a PC, I just close the valves and drain the oil back into the tank, then cap the connections. I'll need some special oil for low temperature operation (anyone suggest something that'll work at the low temperatures we typically work with?). For the condenser loop, car motor oil or water with additives should work. (Of course, water generally doesn't go well with electronics! I like to use oil because it is unlikely to damage anything if it leaks.)

Now, if I locate a cheap source for individual phase change coolers for each PC, I'll go that route. But under $200 for a multiple PC cooler is hard to beat! And PEX is much easier to work with (bend) than copper...

[jinu117]

LoL.... May I suggest Lumidol. Considering amount you will use. Thermal transfer sucks like most oils are in comparison to water but it can be somewhat overcome with plate heat exchanger (obviously... I've done it before)... typical coil idea need to be dropped due to heat transfer of lumidol not being that great.
Now onto fitting, you will spend much on this but I do suggest quick coupling. It is expensive yes but sure way to make it easier for you to connect and disconnect loops... Probably one with viteon seal will do nice.
Permeability of most oils are great so careful planning need to be done for waterblock attachment, etc.
One good thing is, lumidol won't kill any component even if it leaks...
Now there are better liquids but those are VERY pricey and with the volume you are looking to use, won't be reasonable option at all.
BTW, thanks for the link on the compressor, will look into that :)

[epion2985]

Who is talking about cooling oil? Don't make me take out my big submersion cooling sucks post :mad: