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CM storm trooper airflow - Page 2

post #11 of 20
Quote:
Originally Posted by BradleyW View Post

If this was my case, I would remove the HDD cages and mod some high airflow fans at the front and attach fans at the side. Then I would have my rad as intake at the front and use a strong rear fan to blow out all the air before heat accumulates. Plus, the air will be pressurised somewhat due to the positive airflow, which will cool the air in itself.
Some of your assumptions are in the Twilight Zone.. or is it Twi-air Zone? . lmaosmiley.gif
* A single puff of hot air moving fast past something has less time to heat it... A steady flow of hot air moving past something not matter how fast heats up whatever it is flowing past. Now if it's really fast than the friction of the air also creates heat.

* When you pressurize air it increases in temperature, does not get cooler. doh.gif Now the amount of pressure increase caused by a fan is so low it would be very hard to even measure a temperature change. But an air compressor for example need to to radiate heat off of pump and main pipe coming of of pump to tank to cool it on it's way to tank. And when you blow air out of the end of a pressure hose it releases heat and and is cooler. Same principle of vacuum vs pressure used in refrigeration, AC cooling and reversed to use for heat-pump heating systems.
post #12 of 20
Quote:
Originally Posted by doyll View Post

Some of your assumptions are in the Twilight Zone.. or is it Twi-air Zone? . lmaosmiley.gif
* A single puff of hot air moving fast past something has less time to heat it... A steady flow of hot air moving past something not matter how fast heats up whatever it is flowing past. Now if it's really fast than the friction of the air also creates heat.

* When you pressurize air it increases in temperature, does not get cooler. doh.gif Now the amount of pressure increase caused by a fan is so low it would be very hard to even measure a temperature change. But an air compressor for example need to to radiate heat off of pump and main pipe coming of of pump to tank to cool it on it's way to tank. And when you blow air out of the end of a pressure hose it releases heat and and is cooler. Same principle of vacuum vs pressure used in refrigeration, AC cooling and reversed to use for heat-pump heating systems.

Positive airflow results in cooler system operation and increases pressure and speed of airflow, which in itself allows that air to escape quicker providing you have good ventelation.
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post #13 of 20
Quote:
Originally Posted by BradleyW View Post

Positive airflow results in cooler system operation and increases pressure and speed of airflow, which in itself allows that air to escape quicker providing you have good ventelation.
That's what you should have said to start with.thumb.gif
There's long standing arguments going about positive vs negative case pressure. Many agree it is not positive airflow or negative airflow but proper airflow that cools best... meaning getting the air flows to what needs cooling and then having it flow out of case without warming something else up. A case can have higher cfm rating on input or higher cfm rating on output and both will do same cooling if airflow is going where it needs to go.

Positive case pressure is beneficial because with filtered intakes it does a better job of keeping dust out.

Still don't agree with your
Quote:
I would have my rad as intake at the front and use a strong rear fan to blow out all the air before heat accumulates.
Hot air coming into a case that is not totally water cooler is counterproductive to me... doesn't matter how fast you try to get it out, whatever it contacts will not be able to radiate as much heat out as it would with cooler air in case.. or worse it absorbs heat from the heated air coming off of radiator.

You are no dummy I'm sure. I noticed you know how to think and your posts show it..
Edited by doyll - 4/27/13 at 8:01am
post #14 of 20
Quote:
Originally Posted by doyll View Post

That's what you should have said to start with.thumb.gif
There's long standing arguments going about positive vs negative case pressure. Many agree it is not positive airflow or negative airflow but proper airflow that cools best... meaning getting the air flows to what needs cooling and then having it flow out of case without warming something else up. A case can have higher cfm rating on input or higher cfm rating on output and both will do same cooling if airflow is going where it needs to go.

Positive case pressure is beneficial because with filtered intakes it does a better job of keeping dust out.

Still don't agree with your
Hot air coming into a case that is not totally water cooler is counterproductive to me... doesn't matter how fast you try to get it out, whatever it contacts will not be able to radiate as much heat out as it would with cooler air in case.. or worse it absorbs heat from the heated air coming off of radiator.

You are no dummy I'm sure. I noticed you know how to think and your posts show it..
The key to cooling liquid is using the coolest air. Having my H100i drops temps by 10c compared to having it set as exhaust.
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post #15 of 20
Quote:
Originally Posted by BradleyW View Post

The key to cooling liquid is using the coolest air. Having my H100i drops temps by 10c compared to having it set as exhaust.
The key to cooling anything is using the coolest air.

I'll bet the inside of your case is well over 10c hotter than ambient even with your H100i exhausting into it than exhausting out...

If your case is cooling properly there is no reason for you to have 10c difference between intake and exhaust on your H100i.

My guess is your GPU is your primary heat source and the hot air off of it is increasing your intake temp on your H100i.


This is Memir0's thread so how about you start one and we can discuss this.
post #16 of 20
Quote:
Originally Posted by doyll View Post

The key to cooling anything is using the coolest air.

I'll bet the inside of your case is well over 10c hotter than ambient even with your H100i exhausting into it than exhausting out...

If your case is cooling properly there is no reason for you to have 10c difference between intake and exhaust on your H100i.

My guess is your GPU is your primary heat source and the hot air off of it is increasing your intake temp on your H100i.


This is Memir0's thread so how about you start one and we can discuss this.

Sure.
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post #17 of 20
Quote:
Originally Posted by BradleyW View Post

In fact, you could change those fans for static pressure fans to help push past the HDD cages.

Not necessary. There's not enough restriction to warrant SP fans here. I compared a set of Corsair AF120 performance edition vs. SP120 performance edition, and the only difference in observed case temps was negligible, but the huge increase in fan noise with the SP120s was not.

Greg
post #18 of 20

I would move the fans to the front as intakes and possibly add another to the front.


Edited by YounGMessiah - 4/27/13 at 12:21pm
post #19 of 20
Quote:
Originally Posted by hammong View Post

Not necessary. There's not enough restriction to warrant SP fans here. I compared a set of Corsair AF120 performance edition vs. SP120 performance edition, and the only difference in observed case temps was negligible, but the huge increase in fan noise with the SP120s was not.

Greg
I agree with BradleyW about using fans designed for cooler / radiator resistance. HDD cages are very restrictive.

Silverstone posted this about the resistance of different grill mesh pattern and wire grills
http://www.silverstonetek.com/techtalk_cont.php?tid=wh_chessis&area=en
post #20 of 20
The side HDD cages should be intakes as with the front HDD cage fans
And put a 120mm up top in the drive bays, that IS if he wants to install the top fans as exhaust. Of course i would never advocate back top exhaust and front top intake lol (It would be like recycling hot air) that's why i settled on all intakes and side panel + rear exhausts
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Ayase Eli
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