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Thread: COOLING THE CARPUTER

  1. #21
    FLAC
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    Cool

    I is very possible but i seriously doubt it will happen if u have ur PC in the trunck. Either way i took this particular sceneriou into consideration when i designed ALL my box.... I have one of those things they put in HD case or alot of computer stuff to collect or absorb water, i can't remmember what it is called.
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  2. #22
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    Post

    It's called a dessicant. It says "DO NOT EAT" in all of them hehehe...all it does it absorbs moisture and keeps everything dry. Calcium Chloride also does that... the one I have reads Silica Gel.

    I found some more of these thermoelectric cooling systems at Meci for around $20 with heatsink n all... might be worth a try. Any takers besides me?

    http://www.meci.com/default.asp?mode...ms&category=80
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  3. #23
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    Yeah, I put three packets of silica gel inside the case of my computer. One next to the hard drive, one near the power supply (air travelling in and out) and one on the motherboard.

    Haven't had any moistures problems. I put it just to be safe, since we get a lot of fog in this area.
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  4. #24
    Maximum Bitrate Skippman's Avatar
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    Bump.

    I need to know more about this. Cooling is going to be very important to me. I plan to have the carputer running 24/7.
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  5. #25
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    Originally posted by Skippman
    I need to know more about this. Cooling is going to be very important to me. I plan to have the carputer running 24/7.
    Cooling is not going to be very friendly to your battery, and neither is running 24/7.

    I left my dome light on in my car and lost my keys. It took a day and a half for the battery to wear down to where I couldn't start the car. I'd imagine your computer would make far quicker work of your battery than this.
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  6. #26
    FLAC MP3DUB's Avatar
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    TEC's also have a maximum delta T, so the warmer the surrounding air on the hot side, the "less cool" the cold side can be. And the delta T depends on how powerful the TEC is. On the upside, the ~14vdc that the car electical system puts out is the "sweet spot" on may tecs, giving the optimum effiency. And while the case interior being cold (and yes, you do have to worry about condensation) and the exterior being hot will cause the system to loose efficiency, you could help the situation by venting the trunk to the passenger compartment. And also to keep in mind, the hot side of the tec will be as hot as a high powered processor.
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  7. #27
    Maximum Bitrate Skippman's Avatar
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    Originally posted by ShinkunoNamida

    Cooling is not going to be very friendly to your battery, and neither is running 24/7.

    I have the fortune, or miss fortune depending on how you look at it, to work with several electrical engineers. We've worked up a stand by power relay box to control power between two batteries. The main car (Optima Yellow Top) and the standby (Another Optima). When the car is running, the PC will be in normal mode. When the ignition is removed a timer starts.

    In 10 seconds, if the ignition has not been restored the carputer goes to hybernate mode. A relay trips, isolating a second battery.
    Since the computer is on stand-by and isolated to the second battery, drain should be kept to a minimum. Should the second battery drain, no problem. The starter battery is isolated and will begin to recharge the battery upon power-up of the car.
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  8. #28
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    Hey moahdib, I know exactly what you are talking about. I have a water cool rig that uses the same principle. A peltier that is sandwitch between two aluminum heat sink. The cold side however is submerged in a water reservoir. If you can manage to keep the hot side down, the cold side can get really cold. I left the water rig on and the pc off, about 3 hours later the surface had turn to a thin layer of ice.

    I was thinking of doing the same thing with my setup once its up and running but jshrieve is right about the overall heat buildup in the truck. I was thinking of doing this. Have a peltier cooled water reservoir under your hood (if you can find space) and have that water pumped to a radiator inside your case. A fan ofcourse is needed to exchange heat. It really helps if you use copper instead of aluminum and make sure to insulate the pipes and reservoir.

  9. #29
    FLAC MP3DUB's Avatar
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    Originally posted by Skippman



    I have the fortune, or miss fortune depending on how you look at it, to work with several electrical engineers. We've worked up a stand by power relay box to control power between two batteries. The main car (Optima Yellow Top) and the standby (Another Optima). When the car is running, the PC will be in normal mode. When the ignition is removed a timer starts.

    In 10 seconds, if the ignition has not been restored the carputer goes to hybernate mode. A relay trips, isolating a second battery.
    Since the computer is on stand-by and isolated to the second battery, drain should be kept to a minimum. Should the second battery drain, no problem. The starter battery is isolated and will begin to recharge the battery upon power-up of the car.
    So then the fact that the computer will be "on 24/7" doesnt matter, as its hibernating. Also to keep in mind, A tec will easily draw 1amp@14vdc, and depending on how powerful of a tec it is, possibly much much more.
    -Nick

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  10. #30
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    Cooling the case with a peltier seems to be quite a good idea to me, although it may not be necessary under normal conditions.

    But the opportunity that lies in the peltier system is that you could also use it to heat up the system when itīs too cold outside.

    Would be really cool to to build some logic that controls the peltier in a way that it allways keeps the system in a decent temperature.

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