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To Blow, or To Suck?

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Cakemeister:
From what I understand, you're building a box around 2/3 computers, external drive, network switch, etc.? And the purpose of the box is to 1) dampen sound and 2) keep all the clutter together?

Xiaou2:
The mas of hot air will not grow, because its constantly being forced out of
the cabinet with positive pressure from Cooler air.

 As a side note,  I used to work in a clean room, and they also used a
positive pressure system to better regulate the temperature and humidity.

 
 Trying to Suck the air out of a non-sealed case is nearly impossible to
get all of the case air to flow thru all the areas which have heat... and
thus you Would get heat buildup in certain areas.

 Positive pressure assures that All of the air will be replaced in a case
equally, because of constant pressure being applied.
 

Malenko:

--- Quote from: Xiaou2 on December 22, 2009, 09:33:35 am ---The mas of hot air will not grow, because its constantly being forced out of
the cabinet with positive pressure from Cooler air.

 As a side note,  I used to work in a clean room, and they also used a
positive pressure system to better regulate the temperature and humidity.

 
 Trying to Suck the air out of a non-sealed case is nearly impossible to
get all of the case air to flow thru all the areas which have heat... and
thus you Would get heat buildup in certain areas.

 Positive pressure assures that All of the air will be replaced in a case
equally, because of constant pressure being applied.
 

--- End quote ---

I dont think you read her question. She isnt talking about a PC case. Also hot air mass will grow if not properly ventelated. Im not saying there wont be some loss through positive pressure, but if the heat builds at a faster rate then its forced out of the case, the mass will increase, and once it does and the "top" is filled, it will grow downward with the hottest air in the mass still up top, because heat does rise.

hypernova:

--- Quote from: Xiaou2 on December 22, 2009, 01:38:09 am ---
--- Quote --- Eventually that heat is going to have no place to go but down.
--- End quote ---
 
 Heat RISES!  
--- End quote ---

Well, sure.  Everyone looks like a moron when you take things completely out of context and completely ignore my preceding sentence.


--- Quote --- In the analogy, you will bake no matter what.  The difference is How fast.
Put a fan above your head, and you will be fried like chicken in seconds.

 Blow the fan across wise, so that its directed at the heat source and you... and you
might last 10 minutes.
--- End quote ---

So for all intents and purposes, we shouldn't even be considering this situation.  According to you, mine apparently lasts seconds, and yours minutes.  Not relevant when we're trying to reach thousands of hours.


--- Quote ---
--- Quote ---Of course, I'm willing to admit I'm mistaken, but I am rather certain I've read when presented with only one or the other as the choice, the exhaust is the best choice-assuming it is placed wherever the heat gathers the most.
--- End quote ---

 Well, youd be wrong... and so would all the other clowns who wrote that Crap.
--- End quote ---

You always get this animated when someone offers a different viewpoint to a problem?


--- Quote --- Put 4 hds stacked in a case, with one cooling fan at the top of the case.  Watch
the temp as you give them a workout.  They will be able to fry an egg in no time...
even If the case itself feels cool/warm.

 Same deal, but have a fan blow air directly across the surface of all the drives.
They will be cool/warm  to the touch.  not egg-scorching hot.

 How do I know?  EXPERIENCE.  (as well as LOGIC)
--- End quote ---

And I believe herein lies your problem.  If you take a look at the original post, he asks whether it is better to draw air in from the bottom, or push air out at the top.  You're introducing variables and bells and whistles that weren't part of his original query.  You're throwing heatsinks and a so-far indeterminate amount of fans to cover all the surface area of the HDDs and such.  Heck.  I can do you one better.  Mod a small refrigerator, with numerous fans and liquid cooling and throw that array in there.  It may never reach room temperature for all I know.

When you start introducing heatsinks and fans on those heatsinks, yes, you are correct.  Heatsinks dissipate, while fans blow the cooler air onto it (assuming it has access to cooler air).  I never said you weren't correct in this.  I was just trying to stay within the bounds of the situation presented.

So can you at least agree that when presented with either an intake at the bottom or an exhaust at the top, you should take the exhaust?

DaOld Man:

--- Quote from: pinballjim on December 22, 2009, 08:10:41 pm ---
--- Quote from: hypernova on December 22, 2009, 07:54:24 pm ---Well, sure.  Everyone looks like a moron when you take things completely out of context

--- End quote ---


--- Quote --- If you take a look at the original post, he asks whether it is better to draw air in from the bottom, or push air out at the top.  You're introducing variables and bells and whistles that weren't part of his original query.

--- End quote ---

 :laugh2:

--- End quote ---

Ahem, to put it more nicely, he is a she and his is hers (The last part sounds just like a marriage).

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