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My home made open bench case, does it really help cooling though? - Page 2

post #11 of 21
Ask yourself why radiator shrouds are so important on things like cars. Air wants to take the path of least resistance, so without a shroud forcing air through a radiator, a huge percentage of the air will just go around it because it's easier due to pressure differences.

Here's an image of airflow over an intercooler for a turbocharged car (from the book, "Maximum Boost" by Corky Bell) to give you an idea of what I'm talking about:



Of course, this doesn't just apply to radiators/intercoolers.

I guess my point is that properly designed cases and components will act as "shrouds" and can certainly offer better cooling than open air rigs.
Edited by Tempest2000 - 3/11/13 at 12:29pm
post #12 of 21
Thread Starter 
Quote:
Originally Posted by Tempest2000 View Post

Ask yourself why radiator shrouds are so important on things like cars. Air wants to take the path of least resistance, so without a shroud forcing air through a radiator, a huge percentage of the air will just go around it because it's easier due to pressure differences.

Here's an image of airflow over an intercooler for a turbocharged car (from the book, "Maximum Boost" by Corky Bell) to give you an idea of what I'm talking about:



Of course, this doesn't just apply to radiators/intercoolers.

I guess my point is that properly designed cases and components will act as "shrouds" and can certainly offer better cooling than open air rigs.

So when I'm building the rest of this case I should probably make some fan "shrouds" so that it can suck more air in?
post #13 of 21
Hard to tell in the pictures, but you should at least have some kind of ducting from the fan(s) to the component(s) being cooled. Otherwise the air will just go around the components instead of onto/through them.
post #14 of 21
Quote:
Originally Posted by Desolator2B View Post

So when I'm building the rest of this case I should probably make some fan "shrouds" so that it can suck more air in?

no that picture illustrates ram air induction. (air pushed into the shroud from an external force such as a moving car) the physics is entirely different when you are talking about using fans. for a fan/turbine driven induction, the bell shaped shroud(2nd one on the illustration) is best IF you are using some extremely high RPM fans.

for fans operating at speeds that wont make you deaf, it doesn't really matter that much. you aren't creating air pressure high enough to matter. the only use of a shroud in a computer is to channel the air where you want to go.
post #15 of 21
Quote:
Originally Posted by Tempest2000 View Post

Hard to tell in the pictures, but you should at least have some kind of ducting from the fan(s) to the component(s) being cooled. Otherwise the air will just go around the components instead of onto/through them.

not really necessary. if he simply cover the side where he currently has the 80mm fan hanging on strings with a pair of AP181's as intake and put some fan filters on it, he'll be fine with airflow. if he's really paranoid, he can put an filtered AP181 directly over the expansion slots to provide even more cooling air to the GPU's.
post #16 of 21
Thread Starter 
Quote:
Originally Posted by Tempest2000 View Post

Hard to tell in the pictures, but you should at least have some kind of ducting from the fan(s) to the component(s) being cooled. Otherwise the air will just go around the components instead of onto/through them.

I can definitely do that, again, this will be a closed system eventually.

Quote:
Originally Posted by psyclum View Post

no that picture illustrates ram air induction. (air pushed into the shroud from an external force such as a moving car) the physics is entirely different when you are talking about using fans. for a fan/turbine driven induction, the bell shaped shroud(2nd one on the illustration) is best IF you are using some extremely high RPM fans.

for fans operating at speeds that wont make you deaf, it doesn't really matter that much. you aren't creating air pressure high enough to matter. the only use of a shroud in a computer is to channel the air where you want to go.

Well, that 80mm fan really puts out, can spin at around 6000 RPM
Quote:
Originally Posted by psyclum View Post

not really necessary. if he simply cover the side where he currently has the 80mm fan hanging on strings with a pair of AP181's as intake and put some fan filters on it, he'll be fine with airflow. if he's really paranoid, he can put an filtered AP181 directly over the expansion slots to provide even more cooling air to the GPU's.

Not too worried since I figure I'll be buying a new card soon any way, but that specific GPU does run hot.
post #17 of 21
Quote:
Originally Posted by Desolator2B View Post


Well, that 80mm fan really puts out, can spin at around 6000 RPM

jet-test.jpg

see the shroud on that fan is kinda bell shaped (with a filter on there) biggrin.gif
post #18 of 21
Thread Starter 
Quote:
Originally Posted by psyclum View Post

jet-test.jpg

see the shroud on that fan is kinda bell shaped (with a filter on there) biggrin.gif

Lol. So that's what I should make for the fan?
post #19 of 21
Well thats one way of turning your pc into ashes when you rage-quit. biggrin.gif
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Piledriver Reborn
(18 items)
 
   
CPUMotherboardGraphicsRAM
Intel I7 4770k 4.5Ghz Asus Z97 P Gigabyte RX 480 4GB (580 BIOS) 16Gb (4x4Gb) @ 1600Mhz 
Hard DriveHard DriveHard DriveCooling
Kingston SSDNow 120GB M.2 Seagate Constellation ES 2TB Sandisk X110 128gb  Enermax UCTP12P 120mm x 5 
CoolingOSMonitorKeyboard
Phanteks U-Type Black Windows 10 Pro Samsung 27" Curved S27D590C Corsair K95 RGB Platinum 
PowerCaseMouseMouse Pad
Corsair Modular RM650X Zalman Z11 Plus Corsair Scimitar Pro Corsair Polaris 
AudioOther
Corsair Void 7.1 Ikea Corner Desk 
CPUMotherboardGraphicsRAM
Intel Core I5 3427U Panasonic CF-AX2 Intel HD 4000 Series 4GB 1333Mhz DDR3L 
Hard DriveCoolingOSOS
128GB Samsung P830 M-Sata SSD Stock Cooler Windows 10 Pro Remix OS 
OSMonitorKeyboardPower
Ubuntu 16.04.1 1366x768 10.1" Touchscreen @ 60Hz Panasonix CF-AX2 EN-GB Qwerty Keyboard Panasonic 29520mWh 
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Panasonic CF-AX2 Touchpad Realtek ALC269 
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post #20 of 21
Quote:
Originally Posted by Desolator2B View Post

Lol. So that's what I should make for the fan?

well... if you look hard enough biggrin.gif



but seriously tho... smile.gif

air filter on the other hand....



is highly recommended since you are building a case from scratch anyway biggrin.gif

might as well give your computer the double duty of being a air purifier too smile.gif
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