1. Strider2112's Avatar
    Hi Guys,

    Not sure exactly where to place this, it isn't per-say a question but more of an open discussion.

    Obviously there are no fans or liquid cooling systems (that would require a pump and radiator) in our smartphones (I'm speaking in general, most modern smartphones do not have this with one exception being this rumor )

    This leaves one last theory for removing heat from a small device, heatsinks. From my understanding, a heatsink is a type of material that is designed to disperse heat across its surface, so that it does not build up in one spot. In the US Galaxy S3 it has a Snapdragon Dual Core processor with a clock speed of 1.5 GHz which, while optimized to produce as little heat as possible, generates quite a lot of heat. Another source of heat is the battery, which as far as I can tell is not thermally connected very well.

    A heatsink requires a technique called Thermal Coupling, where you connect the heat source directly to the sink with some sort of thermal isolating compound (this prevents the heat from going anywhere but into the sink), from this point the heat travels into the wide surface area (in the case of other phones I've taken apart, it is a square piece of aluminum on top of the processor), then it is dispersed into "arms" coming off the sink - this is why every surface of the phone feels hot and not just in one section.

    With this information in mind, how do you think we can keep the device cool without adding additional components or modifying the phone at all? (ie. removing heat from the surface of the device)
    07-13-2013 12:42 PM
  2. mssca's Avatar
    I don't think heat is a problem with this phone. The heatsinks they use have passive system not an active one. So just by using the phone around, it dissipate heat. However, if you live in an area with 40C +, then you may want to keep the unit away from sunlight and such. You don't need an active cooling system at all. Oh and the Samsung seems to have the heat sinks near the bottom half of the phone. If you use the phone for hours like I do, I can feel the heat on the screen a bit.
    07-13-2013 04:05 PM
  3. ipwn3r456's Avatar
    Everytime I use my Galaxy S3, once I play games, browse online with cellular network, or using apps that are hardware intensive, it gets really hot after a while. Not sure how hot, but the hottest part is the bottom half of the phone (below the battery where the SIM card and the SD cards are placed, not even the battery gets hotter than that). I don't know if there's really a cooling system for the Galaxy S3, since it's very thin. I always thought about thermal pads would help cooling the phone, will it?
    07-14-2013 12:36 AM
  4. Strider2112's Avatar
    Yeah. The cooling is just an aluminum heatsink. So when you do things like that it will get hot. I have thought of cooling "strips" made of graphite that I've seen online.

    Maybe you should give them a try and let us know how well it works?

    Sent from my SGH-I747M using AC Forums mobile app
    07-14-2013 02:34 AM
  5. anon(6174973)'s Avatar
    Yeah. The cooling is just an aluminum heatsink. So when you do things like that it will get hot. I have thought of cooling "strips" made of graphite that I've seen online.

    Maybe you should give them a try and let us know how well it works?

    Sent from my SGH-I747M using AC Forums mobile app
    You are most probably right. It's virtually impossible to use fans to cool the S3, being so slim.

    Sent from my HP Slate 7 using Tapatalk 4 Beta
    07-14-2013 02:53 AM
  6. AxlMyk's Avatar
    Set the phone on a block of ice.


    --Tapatalk on SGS3.
    07-14-2013 10:34 AM
  7. anon(6174973)'s Avatar
    Set the phone on a block of ice.


    --Tapatalk on SGS3.
    Very innovative. But once the ice melts... Good luck to your phone.

    Sent from my GT-I9505 using Tapatalk 4 Beta
    07-14-2013 10:55 AM
  8. Ricky Babalu's Avatar
    Is 35 F cool enough for you
    :
    :
    07-14-2013 11:11 AM
  9. Strider2112's Avatar
    Wow how did you get your phone so cold? 35F is just above the freezing point of ice

    Sent from my SGH-I747M using AC Forums mobile app
    07-14-2013 11:26 AM
  10. anon(6174973)'s Avatar
    Awesome temperature.

    Sent from my HP Slate 7 using Tapatalk 4 Beta
    07-14-2013 11:58 AM
  11. mssca's Avatar
    Very innovative. But once the ice melts... Good luck to your phone.

    Sent from my GT-I9505 using Tapatalk 4 Beta
    Then you may try solid carbon dioxide (dry ice).
    07-14-2013 12:28 PM
  12. anon(6174973)'s Avatar
    Then you may try solid carbon dioxide (dry ice).
    Really innovative. Better patent that before anyone does!

    Sent from my GT-I9505 using Tapatalk 4 Beta
    07-14-2013 12:52 PM
  13. Ricky Babalu's Avatar
    Wow how did you get your phone so cold? 35F is just above the freezing point of ice

    Sent from my SGH-I747M using AC Forums mobile app
    I was doing yard work listening to music. I noticed my phone was hot from sitting in the sun and playing music for hours; So I thought I would put it in the freezer for a couple of minutes to cool it down, only I forgot about it and 20 minutes later it was at 35
    mssca likes this.
    07-14-2013 02:04 PM
  14. mssca's Avatar
    I was doing yard work listening to music. I noticed my phone was hot from sitting in the sun and playing music for hours; So I thought I would put it in the freezer for a couple of minutes to cool it down, only I forgot about it and 20 minutes later it was at 35
    OMG... are you serious? It is almost like fiction story.
    Ricky Babalu likes this.
    07-14-2013 06:44 PM
  15. Ricky Babalu's Avatar
    OMG... are you serious? It is almost like fiction story.
    Enjoying a few beers along with yard work didn't help the situation
    07-14-2013 10:26 PM
  16. anon(6174973)'s Avatar
    Enjoying a few beers along with yard work didn't help the situation
    Haha so relaxing

    Sent from my GT-I9505 using Tapatalk 4 Beta
    Ricky Babalu likes this.
    07-15-2013 05:56 AM
  17. Strider2112's Avatar
    I'm kind of surprised you didn't hurt the screen, was the phone slow to respond?

    Sent from my SGH-I747M using AC Forums mobile app
    07-15-2013 08:41 AM
  18. Ricky Babalu's Avatar
    I'm kind of surprised you didn't hurt the screen, was the phone slow to respond?

    Sent from my SGH-I747M using AC Forums mobile app
    I have to admit I did panic. I thought for sure my phone was "toast". My biggest concern was condensation, but luckily no damage to the phone at all. Needless to say I won't be doing that again any time soon
    07-15-2013 10:36 AM
  19. Strider2112's Avatar
    Yeah condensation would suck, I've had condensation under a screen once, it was really odd

    Sent from my SGH-I747M using AC Forums mobile app
    07-15-2013 11:09 AM
  20. anon(6174973)'s Avatar
    Yeah condensation would suck, I've had condensation under a screen once, it was really odd

    Sent from my SGH-I747M using AC Forums mobile app
    If there was condensation, charging your phone or putting in a bag of rice would help.

    Sent from my GT-I9505 using Tapatalk 4 Beta
    Ricky Babalu likes this.
    07-15-2013 06:11 PM
  21. Strider2112's Avatar
    I thought of something that might help cool that doesn't involve throwing the phone in the freezer.

    It is as simple as putting it in two sealed plastic bags (two for security, preferably zip lock), and put it in a bucket or tupperware container of ice.

    if you're sure about the seal, a mixture of ice, water, and salt (aka brine) will cool it better. Brine is usually at a temperature of 0 F, which is below freezing.

    Sent from my SGH-I747M using AC Forums mobile app
    Ricky Babalu likes this.
    07-15-2013 06:30 PM
  22. AxlMyk's Avatar
    Brine is usually at a temperature of 0 F, which is below freezing.
    Only if the ice is that cold.



    --Tapatalk on SGS3.
    07-15-2013 09:28 PM
  23. Strider2112's Avatar
    Yes, sorry I was confused, brine freezes at a lower temperature than just water, what I meant is you could get it below 0C, but I don't see why you'd need to do that to begin with, just regular ice water would work

    Sent from my SGH-I747M using AC Forums mobile app
    07-15-2013 09:55 PM
  24. anon(6174973)'s Avatar
    Yes, sorry I was confused, brine freezes at a lower temperature than just water, what I meant is you could get it below 0C, but I don't see why you'd need to do that to begin with, just regular ice water would work

    Sent from my SGH-I747M using AC Forums mobile app
    It would cool faster that way.

    Sent from my HP Slate 7 using Tapatalk 4 Beta
    07-16-2013 03:38 AM

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