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Thread: intake/exhaust pressure?

  1. #11
    MySQL Error MatrixPC's Avatar
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    Here is my experience.
    I have one big a$$ fan mount on top of the PSU which is inside the case.
    If I have it pulling air out, the PSU running hot (110F), but if I reverse the fan to pull air in, the PSU running cooler (95F). At the same time, the case temp is also cooler.
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  2. #12
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    Quote Originally Posted by StationRocket
    Sorry to be a jerk but I actually am an engineer and am very proud of it?
    As am I, this is why I took some offence to the statement by Mike insinuating as if he were the only engineer on the forum/in the world.

    Quote Originally Posted by StationRocket
    In any event any engineer would know that unless you are restricting the airflow there will be no pressure change.
    ANY intake/exhaust system has restriction on airflow, thus there is a pressure change.

    Quote Originally Posted by StationRocket
    Now lets say you had a 3 psi pressure change, pretty slight from the standpoint of the physical properties of the air right?
    Actually, 3 psi is quite substantial in the grand scheme of things. Assuming that you are somewhere near sea level, standard atmospheric pressure is somewhere near 14 psi. Therefore, your 3 psi increase in pressure is in the neighborhood of 1.2 atmospheres.

    In any event, my point was that any pressurized system is better cooled than a non-pressurized system, regardless of the degree to which it is pressurized.
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  3. #13
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    C'mon now Jackso, Mike wasn't being arrogant, at least that is not how I read his post. He was just the first to state that he was an engineer, or hinted towards it. Everyone else was just posting bits of information, but no one really stated what type of engineer they are, and engineering is such a broad title. AFAIK everyone who posted an "I am an engineer" post wasn't clarifying what type, my baby brother is an Automotive Engineer who probably hasn't used a PC since taking his ASE tests and more than likely doesn't know jack about computers or cooling, so if he states "I am an engineer and you should blah blah blah" should one head his advise?

  4. #14
    Constant Bitrate StationRocket's Avatar
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    Quote Originally Posted by brandon
    C'mon now Jackso, Mike wasn't being arrogant, at least that is not how I read his post. He was just the first to state that he was an engineer, or hinted towards it. Everyone else was just posting bits of information, but no one really stated what type of engineer they are, and engineering is such a broad title. AFAIK everyone who posted an "I am an engineer" post wasn't clarifying what type, my baby brother is an Automotive Engineer who probably hasn't used a PC since taking his ASE tests and more than likely doesn't know jack about computers or cooling, so if he states "I am an engineer and you should blah blah blah" should one head his advise?

    Just for the record I was being arrogant, and as far as Iím concerned I know everything and you all should bow down before me. When I was a little boy I dreamed of being an engineer and now that I are one I expect all to quake in my presence.

  5. #15
    MySQL Error MatrixPC's Avatar
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    The denser the air, the cooler it is.
    Car Turbo charger.
    Car AC system.
    Those are the 2 that use pressure to cool the air in your car whether it's for performance or comfort (well some have both, but some has none).
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  6. #16
    Constant Bitrate StationRocket's Avatar
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    Quote Originally Posted by MatrixPC
    The denser the air, the cooler it is.
    Car Turbo charger.
    Car AC system.
    Those are the 2 that use pressure to cool the air in your car whether it's for performance or comfort (well some have both, but some has none).

    not that it applies to this case cooling stuff at all but you got it backwards. when you compress a gas it gets hot and when you expand it it gets cold. PV=nRT -> if P goes up T goes up. That why my WRX has an intercooler to go with the turbo and why the heat exchanger in your ac system is where the compressed refridgerant expands. Again this has nothing to do with open systems like our cases only closed ones like the ac loop and semiclosed sys like a turbocharged intake.

  7. #17
    Raw Wave
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    Just for the record I was being arrogant, and as far as Iím concerned I know everything and you all should bow down before me.



    Cmon man...Im sure we dont need to do this.

    Please be realistic now, you cant possible know everything. If you do then you wont be hanging out here as you be too busy doing some top secret project for the military, NASA or something...theres always someone out there who knows alot more, they sure wont be out here in mp3car bickering with other members.

    Academically Im a engineer in electronics as well as software and never even thought about it until now of course Im sure someone in this forum knows alot more than me. And yes...I do dress up well, brush my teeth, comb my hair, have shower, I dont wear thick glasses, know how to turn a screw, like fighting sports, racing cars and I do love women. So its wrong to say all engineers dont have social life and never dress up. Maybe you are talking about a proper proper scientist whos laptop is more expensive than their car?

    C'mon now Jackso, Mike wasn't being arrogant, at least that is not how I read his post.

    same here, I thought he was just kindly giving out what he knows. Im still trying to work out who got upset with who and why.


    ...just my thoughts, Im not trying to imply anything with anyone.

    Cheer up everyone and peace

  8. #18
    Maximum Bitrate EBFoxbat's Avatar
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    Crap, I missed the memo that said you had to be an engineer to know how to cool a computer. Don't I feel little. I'm nearing my 100th PC built. (Ok really its almost 90, but thats close enough and thats a lot of computers.) Each one has a custom cooling solution. It is an important part of most PCs. Some have no more than a PSU fan (or 2) and a HSF. Some have tons of case fans. A few are water cooled, though that is usually not needed.

    To make a long post short.

    Dannn I (yup just little me with no degree, no Ideal Gas Law, no thermodynamic lectures, just a great deal of experiance) suggest that you use all 3 fans as intakes and filter them for dust. This will keep the dust to a minimum and sufficiently cool your rig.
    ,./(0)3

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  9. #19
    Constant Bitrate StationRocket's Avatar
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    First and foremost Iíd like to officially apologies for my tendency to be arrogant. I was an officer in the Navy for a number of years and they really breed it into you there as Iím sure anyone whoís worked with the type before would agree. I will try to tone it down.

    Second Iíd like to alter my claim about knowing everything to read ďeffectively everythingĒ Ok, ok, of course I was kidding then and am kidding now. If I knew everything I never would have come to this board in the first place to learn from everyone elseís setups. It's ironic that Ricky237 says Iíd be working on a secret military project because I am currently working on a prototype for the main display for new joint strike fighter among other things.

    Third, I couldnít agree more with EBFoxbatís assertion that you donít need to be an engineer to have worthwhile contributions around here. I know a number of engineers, MIT masters even, who couldnít begin to do this sort of thing and I know a number of people with no formal engineering training at all who could put us all to shame.

  10. #20
    Raw Wave
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    First and foremost Iíd like to officially apologies for my tendency to be arrogant.

    You are welcome


    Glad the thread is in peace

    But I guess the original poster is still wondering whats the best solution.

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