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grep · 02-13-2002, 10:41 AM

Why work with a vacuum, what I suggest is nitrogen. Not liquid nitrogen but gaseous nitrogen just like the stuff in the normal air around you. But totally without water vapor, in a closed system then an air/air style cooler with some kind of cooling, in a closed system. Maintained at .25 psi above atmosperic with a regulator and a small nitrogen bottle to handle slow leaks and stuff. No reason the Nitrogen can't be cooled way below ambient with something like an air-conditioner. No water vapor means no condensation no matter how far below the dew point you cool too. I have been thinking of this for a long time as my setup would not require being entirely inside the box. I could mount the air/air cooler outside and the airconditioner outside and keep all the noise away from the room that way. I would duct the cool nitrogen into and the hot nitrogen out of the case using insulated pipes. The case itself would be both heat and sound insulated The removeable media devices would be mounted external to the box and be 1394 firewire or USB2 devices. Heat/Sink Fans would still work normally and the extra 1/4 pound pressure wouldn't even be noticed by the hardware. The sound reduction wouldn't hurt my feelings either. The nitrogen would be moved into and out of the case by normal fans, probably 2 120mm fans, one intake one exhaust, The external air/air heat exchanger could be very large to reduce backpressure and to allow quick exchange of heat from the closed nitrogen system to free air with the free air cooled by an airconditioner. If the airconditioner is run to produce very cold air, a simple drain hole to drain off any condensate. The cost would be fairly high, the operating costs for the additional electricty for the airconditioner would be fairly high, it wouldn't be pretty but it shold cool like hell. Throw in a spot cooling system like a Vapochill and you could run the cpu itself way below zero, and keep most of the system components around o, and if you really felt the need you could water cool the video card and chipset even further. A vapochill run in pure Nitrogen at 0 degrees would be far more efficent than running in air at ambient room temp with no danger of the heat exchanger icing up.

02-13-2002, 10:41 AM	#5
grep Cooling Neophyte Join Date: Mar 2001 Posts: 37	not vacuum, use nitrogen Why work with a vacuum, what I suggest is nitrogen. Not liquid nitrogen but gaseous nitrogen just like the stuff in the normal air around you. But totally without water vapor, in a closed system then an air/air style cooler with some kind of cooling, in a closed system. Maintained at .25 psi above atmosperic with a regulator and a small nitrogen bottle to handle slow leaks and stuff. No reason the Nitrogen can't be cooled way below ambient with something like an air-conditioner. No water vapor means no condensation no matter how far below the dew point you cool too. I have been thinking of this for a long time as my setup would not require being entirely inside the box. I could mount the air/air cooler outside and the airconditioner outside and keep all the noise away from the room that way. I would duct the cool nitrogen into and the hot nitrogen out of the case using insulated pipes. The case itself would be both heat and sound insulated The removeable media devices would be mounted external to the box and be 1394 firewire or USB2 devices. Heat/Sink Fans would still work normally and the extra 1/4 pound pressure wouldn't even be noticed by the hardware. The sound reduction wouldn't hurt my feelings either. The nitrogen would be moved into and out of the case by normal fans, probably 2 120mm fans, one intake one exhaust, The external air/air heat exchanger could be very large to reduce backpressure and to allow quick exchange of heat from the closed nitrogen system to free air with the free air cooled by an airconditioner. If the airconditioner is run to produce very cold air, a simple drain hole to drain off any condensate. The cost would be fairly high, the operating costs for the additional electricty for the airconditioner would be fairly high, it wouldn't be pretty but it shold cool like hell. Throw in a spot cooling system like a Vapochill and you could run the cpu itself way below zero, and keep most of the system components around o, and if you really felt the need you could water cool the video card and chipset even further. A vapochill run in pure Nitrogen at 0 degrees would be far more efficent than running in air at ambient room temp with no danger of the heat exchanger icing up. __________________ every thing is optional