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What lquid do most CPU heatsink heatpipse contain? - Page 6

post #51 of 67
TIL.... heat pipes are hollow....
Brulf
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Brulf
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post #52 of 67
Quote:
Originally Posted by Brulf View Post

TIL.... heat pipes are hollow....

Also... they have a tiny amount of liquid of sorts in them biggrin.gif
Brulf
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Brulf
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post #53 of 67
I am finally settled in to Japan now.
post #54 of 67
Thread Starter 
Quote:
Originally Posted by Brulf View Post

Also... they have a tiny amount of liquid of sorts in them biggrin.gif

Idk that one guy on the first few pages seems to think they're magic.
    
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post #55 of 67
@ billbartuska
*Yes vapor is boiling.
*I acknowledged not knowing what the heat absorption difference is between water and alcohol.
*Evaporation does make things cooler. When a liquid turns to gas it obsorbs heat. It's primary principle of refrigeration. It's what happens when we sweat.
*Liquids expand dramatically when the turn to gaseous state.
*Put an ounce of water in a tray along side of another tray with an ounce of alcohol in it. The alcohol will vaporize in a fraction of the time the water will. Reason is it vaporizes at much lower temperature than water. Doesn't matter if it aborbs more heat per ounce or not. The faster it vaporizeds the faster it removes heat.

Please study your subject before replying. I'm not the only one saying you are wrong. SkeeterSkeeter is quoting your statements are mine and telling you the same thing I've told you.
Quote:
Originally Posted by SkeeterSkeeter View Post

My 2 cents, is first lets get damn NASA in here to straiten this all out.

Second, IMHO I think that the pressure would rise as the temperature does. Using the ideal gas law we see that (Pressure * Volume) = (Number of Moles * .021 * Temperature). For us inside a heat pipe we hold Volume, Number of Moles, and of course the constant (R = .021) constant. So this means for a heat pipe Pressure is directly related to Temperature.

But, this still does not take into account the liquid (not a gas obviously) so it does not fall under this ideal gas law.

But, As the liquid evaporates it becomes a gas giving more pressure, raising the temperature (of the GAS!; which has its heat spread to other object like the heat pipe walls) But then as the gas rises it cools again as it gives heat to the walls, lowering the temperature of the gas (hopefully condensing it).

So at some points the temperature may rise with the pressure, but as soon as that extra temperature leaves through the pipe walls the pressure drops back again. So I guess at some points it is normal (at a base pressure; initial filling pressure), but for it to work it has to lower its pressure to have liquid evaporate, then high pressure/ or cold to condense it.

You are quoting what billbartuska said, not what I said. All of the green text are his statements. Please read my original post #48. I said basically the same thing you are saying; that when the liquid vaporizes it expands and increases the pressure in heatpipe.
Edited by doyll - 2/27/13 at 5:25am
post #56 of 67
Thread Starter 
I used to never try to do the quoting, then I started. Now I think I'll never quote again. I can't do it well.

Also I am confused now.

Well, my question was answered a few posts ago. Thanks OCN!
    
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post #57 of 67
Quote:
Originally Posted by SkeeterSkeeter View Post

I used to never try to do the quoting, then I started. Now I think I'll never quote again. I can't do it well.

Also I am confused now.

Well, my question was answered a few posts ago. Thanks OCN!

I tried to make it easier by adding green text to his post. My bad.

Too many posters have no idea what they are talking about.. And to make matter worse they get totally out of line when someone who does know something says they are wrong.. God help us if we try explaining why they are. Don't ever try giving them facts and links to reality. They know it all, minds are made up and facts only set them off into another realm of egomania with replies of even less knowledge. They know about it than people with years of experience and education in the subject do. After all they probably read it on the internet somewhere.. and if it's on the internet it must be fact! rolleyes.gif

My guess is CPU heatpipes are sealed in a vacuum environment or are heated to near 100c and sealed. The real science of heatpipes isn't the simple pipe or what fluid it contains. It's the wicking material/surface on the inside surface that allows them to work in virtually any position.
Edited by doyll - 2/27/13 at 6:45am
post #58 of 67

Quoting and manipulating the quotes is easy.  If you'd like to see how easy it can be, then ask me.

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post #59 of 67
Thread Starter 
Quote:
Originally Posted by TwoCables View Post

Quoting and manipulating the quotes is easy.  If you'd like to see how easy it can be, then ask me. I smell bad kinda like poo, and I leaked the Ms Teen USA sex tape.

C'mon man children might see this...
    
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post #60 of 67

lol I guess that means "no, thanks" huh?

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It's a computer!
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Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
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