Overclock.net › Forums › Cooling › Cooling Experiments › Alcohol evap?
New Posts  All Forums:Forum Nav:

Alcohol evap? - Page 3

post #21 of 32
A similar and safer method is to use acan of dust-off--the kind that is not air but a compressed gas. Turn the can upside down and when the spray comes out it freezes the HeatSink. I know for a fact this yields an immediate temperature drop which I can repeat and monitor (Everest). How low can you go? About 15C drop on aS754 3200+ Clawhammer at 1.7Vcore clocking 2400mhz.

How long? Only about 20 seconds before the effect is negated. So it would take a 5 second shot every twenty seconds to maintain about a 10C drop...that's a lot of of Dust-Off...LOL.

Maybe some sort of tanked inert gas would be more economical...I vote for Nitrous Oxide...
Shop Dog
(13 items)
 
 
CPUMotherboardGraphicsRAM
E8400 Asus Blitz Formula SE HD3870X2 G Skill 2 x 2GB DDR2 800 
Hard DriveOptical DriveOSMonitor
Velociraptor 150GB LG DVD Burner Vista Ultimate 64 AOC 21.5" LED 1080p 
KeyboardPowerCaseMouse
Deck Legend Silverstone 750 Modular OverClock Edition Lian Li V1100 Logitech Trackball 
Mouse Pad
Nope 
  hide details  
Reply
Shop Dog
(13 items)
 
 
CPUMotherboardGraphicsRAM
E8400 Asus Blitz Formula SE HD3870X2 G Skill 2 x 2GB DDR2 800 
Hard DriveOptical DriveOSMonitor
Velociraptor 150GB LG DVD Burner Vista Ultimate 64 AOC 21.5" LED 1080p 
KeyboardPowerCaseMouse
Deck Legend Silverstone 750 Modular OverClock Edition Lian Li V1100 Logitech Trackball 
Mouse Pad
Nope 
  hide details  
Reply
post #22 of 32
Quote:
Originally Posted by CyberDruid View Post
A similar and safer method is to use acan of dust-off--the kind that is not air but a compressed gas. Turn the can upside down and when the spray comes out it freezes the HeatSink. I know for a fact this yields an immediate temperature drop which I can repeat and monitor (Everest). How low can you go? About 15C drop on aS754 3200+ Clawhammer at 1.7Vcore clocking 2400mhz.

How long? Only about 20 seconds before the effect is negated. So it would take a 5 second shot every twenty seconds to maintain about a 10C drop...that's a lot of of Dust-Off...LOL.

Maybe some sort of tanked inert gas would be more economical...I vote for Nitrous Oxide...
A CO2 evap has been discussed before, but it's quite dangerous to use....Especially since CO2 is denser than air. You'd need to use it outside, with a big box fan blowing all the CO2 away...

You'd need a big can, too...The size of a large cylinder, because CO2 really doesn't come super-compressed like nitrogen (air) does.
Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
Hard DriveOptical DriveOSMonitor
3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
KeyboardPowerCaseMouse
Logitech G15 Silverstone OP750 Lian-Li PC-A10B Logitech G5 
Mouse Pad
Harley Davidson 
  hide details  
Reply
Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
Hard DriveOptical DriveOSMonitor
3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
KeyboardPowerCaseMouse
Logitech G15 Silverstone OP750 Lian-Li PC-A10B Logitech G5 
Mouse Pad
Harley Davidson 
  hide details  
Reply
post #23 of 32
Quote:
Originally Posted by alk View Post
Its not the coolness of the alcohol thats cooling the CPU here, its the phase change process. Having the alcohol closer to the boiling point will actually increase effectiveness. You wont notice much in the way of idle temps, but laod temps should be smaller. What you need to understand is that we arent using the alcohol like water to absorb the heat. We are using the heat to evaporate the alcohol and thus dissipating the maximum heat Power per meters^2 Kelvin (W/m^2 K) Which for boiling liquids is 100000 W/m^2 K. This number is known as the heat coefficient (h) and is typically 2-25 for natural convection in gasses, 25-300 natural convection in liquids, 25-250 in forced gases, and 50-50000 in forced liquids (Forced meaning forced convection such as a fan or pump. natural being without mechanical aids)

I study mechanical engineering, and heat and flow is one of the subjects I do, hence I know quite a bit on this matter!
It's know-it-all responses like this that are barely even relevant to what I'm talking about that make me doubt in engineers so much. Honestly, you act as if no one could possibly already have known what you are talking about. It does not take an engineering degree to be able to look up specific heats, energy of sublimation/vaporization/etc and calculate the various values of coolant alternatives.

Why do you think I picked pentane of all things for submersing the HS in? Perhaps because its boiling point is BARELY above room temp (perhaps lower if you have no A/C on the equator). You can dump 5000watts of heat into a vat of pentane and the liquid will NEVER go above it's BP. Why? Because it boils off the heat... -gasp- wait! There's that damn phase change we were talking about. And it IS the coolness of the pentane that's keeping the temp where it is... granted, through vaporization that coolness is maintained but... you were trying to talk to me like I'm an idiot, was wrong, and I don't like it when people do that.

Is this the absolute most effective use of phase change? Hell no, but it's allows for cold bugged CPUs to have the lowest load temp possible. The more the wattage dissipated into the pentane the faster it vaporizes, theoretically, keeping the CPU at the BP of the pentane....31C. Neopentane would be even better at a BP of 10C but that is a bit hard to control since it'd essentially be boiling even when it's sitting there. That's a little beyond the scope of what's trying to be accomplished here, don't you think?
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
post #24 of 32
Quote:
Originally Posted by Ihatethedukes View Post
It's know-it-all responses like this that aren't even relevant to what I'm talking about that make me doubt engineers so much.
Dude, what are you talking about? This isn't your thread and his response is helpful to what the thread topic is about.
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
post #25 of 32
It may not be my thread but the fact that his response:

A) Shows great mastery of repeating of factual numbers which I applaud him for.
B) Is an entirely wrong application of those facts he remembered so well and I showed that. Which ultimately means his post only served to make me further expound on what I was suggesting.
C) Throws in the ubiquitous "I'm an engineer"(in training in this case) to try and give a -wrong- conclusion some weight. ...as if being an engineer causes infallibility. Perhaps I'm hypersensitive to this because it happens to often but you have to admit that he is, indeed, wrong in the application I suggested.

In any case this all makes his post both wrong, on the whole, unhelpful, and, to me, offensive.
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
post #26 of 32
Quote:
Originally Posted by Mister Crowley View Post
Lol yes, your home could potentially backfire like an old ford
HAHA! Wooo....the visualization of flaming headers coming out of your PC! LOL!
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
TITAN-6
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600K @ 4GHZ ASRock Extreme 3 Gen 3 Gigabyte Nvidia GTX 570 8GB G.skill Sniper DDR3 1866 
Hard DriveOptical DriveCoolingOS
Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MATSHITA BD-CMB UJ160 Blu Ray DVD writer Cooler Master Hyper 212+ Windows 7 x64 
MonitorMonitorKeyboardPower
Sceptre 24" LCD BENQ 3D 24" LCD Logitech G510 Corsair 750W HX professional single rail 
CaseMouseMouse PadAudio
CM Storm Sniper Razer Naga left-handed version None Onboard 
  hide details  
Reply
post #27 of 32
Quote:
Originally Posted by Ihatethedukes View Post
It may not be my thread but the fact that his response:

A) Shows great mastery of repeating of factual numbers which I applaud him for.
B) Is an entirely wrong application of those facts he remembered so well and I showed that. Which ultimately means his post only served to make me further expound on what I was suggesting.
C) Throws in the ubiquitous "I'm an engineer"(in training in this case) to try and give a -wrong- conclusion some weight. ...as if being an engineer causes infallibility. Perhaps I'm hypersensitive to this because it happens to often but you have to admit that he is, indeed, wrong in the application I suggested.

In any case this all makes his post both wrong, on the whole, unhelpful, and, to me, offensive.
But you are unnecessarily being an arse to him because he tried to help.
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
The Fox Box
(16 items)
 
Macbook Pro
(10 items)
 
 
CPUMotherboardGraphicsRAM
Intel 3930K ASUS P9X79 ASUS GTX 570 DCII 4 x 4GB G.Skill Sniper 1600MHz LV 
Hard DriveOptical DriveCoolingOS
Intel 330 - 180GB LG HDDVD & Blu Ray Reader Cooler Master Hyper 612 Windows 7 Ultimate 64bit 
MonitorMonitorKeyboardPower
HP ZR30w Samsung 2243BWX Ducky! PCP&C 750w Silencer (coppa) 
CaseMouseMouse PadAudio
Lian Li PC-E8 G9x S&S Steel Onkyo Receiver/Design Acoustics 2.1 system 
CPUGraphicsRAMHard Drive
Core i5 2410M HD 3000 8GB 120GB SSD 
Optical DriveOSOSOS
Super Drive OSX 10.7.2 Win 7 Enterprise (In VB) Ubuntu 10.04 (In VB) 
MonitorPower
13" 1280x800 65w Magsafe 
CPUMotherboardRAMHard Drive
Q9300 Gigabyte P35 8GB DDR2 2TB WD 
Hard DriveHard DriveHard DriveHard Drive
2TB WD 2TB Seagate 1.5TB Seagate 1.5TB Seagate 
Hard DriveHard DriveHard DriveOptical Drive
1TB Hitachi 1TB Hitachi 500GB WD DVD-RW 
OSMonitorKeyboardPower
Win Server 2012 Headless/15" touchscreen Apple mini USB PC P&C 500W 
  hide details  
Reply
post #28 of 32
Quote:
Originally Posted by Mootsfox View Post
But you are unnecessarily being an arse to him because he tried to help.
As was he, from my perspective. It came off as condescending and, as I said before, offensive; it's something that I respond to in turn.
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
Raptor Raper
(13 items)
 
  
CPUMotherboardGraphicsRAM
Something with transistors FOXCONN Boodrage -> eVGA classified e760 GTX 480 / HD6850@1090/1200 3x2 gig G Skill Trident DDR2000 
Hard DriveOptical DriveOSMonitor
2x128GB Crucial C300 Sumsung SATA DVD-RW 64 bit Windows 7 Samsung 245BW 
KeyboardPowerCaseMouse
Microsoft curve Tagan ITZ 800W DD Torture Rack Diamondback 
  hide details  
Reply
post #29 of 32
Quote:
Originally Posted by Ihatethedukes View Post
It may not be my thread but the fact that his response:

A) Shows great mastery of repeating of factual numbers which I applaud him for.
B) Is an entirely wrong application of those facts he remembered so well and I showed that. Which ultimately means his post only served to make me further expound on what I was suggesting.
C) Throws in the ubiquitous "I'm an engineer"(in training in this case) to try and give a -wrong- conclusion some weight. ...as if being an engineer causes infallibility. Perhaps I'm hypersensitive to this because it happens to often but you have to admit that he is, indeed, wrong in the application I suggested.

In any case this all makes his post both wrong, on the whole, unhelpful, and, to me, offensive.
My post was not merely to display random facts and figures. Anyone can look up a table of heat capacities. But I did not post heat capacities. I posted heat/thermal coefficients for heat tranfers within a set system of boundaries.

The reason figures were posted was to illustrate the differences between forced convection, natural convection, and phase change. As for the "I'm an engineer" comment, I thought Id actually have to post it so that people dont just dismiss the statement as being utter BS, which many probably would, such as yourself in this instance.

As for my so called blatant "arrogance" here, if this is defined as adding a statement to correct your idea to a more suitable soltion to the problem, then so be it, Im arrogant. However, theres a difference between knowing that phase change transfers lots of energy, and grasping the underlying concepts and theory involved in the matter.

As far as your comment of being deeply offended, what do you do when working in a team, such as this forum, to solve a problem, and someone expands on your idea, and perhaps corrects you slightly, still acknowledging your idea as a valid and good solution? The expression is "Keeping an open mind".

This has been a near pointless arguement, and as far as Im concerned, the matter is completely off topic and a waste of my time and everyone elses. Having gone to the effort of consulting one of my lecturers on the matter at hand to try and provide a solution that is more fitting, and having it thrown back in my face, I see no reason for me to continue providing input into this thread.
    
CPUMotherboardGraphicsRAM
Intel Centrino T2300 @ 1.83 GHz Intel GM945 Express Chipset Intel GMA950 2x1GB PC2-5300 667MHz 
Hard DriveOptical DriveOSMonitor
250GB 7200rpm WD Scorpio Black USB External DVD/CDRW Windows XP Pro SP3 12.1" 1024x768 DVI 
PowerCaseMouse
4400mAh Li-ion (7+ hours on power saving profile) Carbon Fibre with Magnesium alloy roll cage IBM Trackpoint 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Centrino T2300 @ 1.83 GHz Intel GM945 Express Chipset Intel GMA950 2x1GB PC2-5300 667MHz 
Hard DriveOptical DriveOSMonitor
250GB 7200rpm WD Scorpio Black USB External DVD/CDRW Windows XP Pro SP3 12.1" 1024x768 DVI 
PowerCaseMouse
4400mAh Li-ion (7+ hours on power saving profile) Carbon Fibre with Magnesium alloy roll cage IBM Trackpoint 
  hide details  
Reply
post #30 of 32
constructive criticism and new perspectives on original ideas from the people who start the threads are what these forums are for, arguements are a waist of everyones time. Trial and error are also part of the ideas and projects. Just be causios if you are using any forms of volatile materials.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
3700+ Sandi 939dual-VSTA x1900xt 1G 
Hard DriveOSMonitorKeyboard
WD 160g sataII xp cor viewsonic g90f logitec 
PowerCaseMouse
XION 600w antec full tower logitec 7 button opt 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
3700+ Sandi 939dual-VSTA x1900xt 1G 
Hard DriveOSMonitorKeyboard
WD 160g sataII xp cor viewsonic g90f logitec 
PowerCaseMouse
XION 600w antec full tower logitec 7 button opt 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Cooling Experiments
Overclock.net › Forums › Cooling › Cooling Experiments › Alcohol evap?