This is the Surface Pro 4's hybrid liquid cooling system

By Scorpus ยท 9 replies
Oct 8, 2015
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  1. One of the interesting tidbits to come out of Microsoft's Surface Pro 4 launch was that the tablet features a 'hybrid liquid cooling' solution to keep the Intel Core processor and other critical components cool.

    An image of the internals of the Surface Pro 4 has been posted to Imgur, exposing the hybrid liquid cooling system. Notes on the image from Sean Org, Senior Engineer at EMI Consulting, explain how this liquid cooling system works.

    The cooling system is essentially a thin vapor chamber designed to fit inside the Surface Pro 4's 8.4mm slim body. Heat from the CPU in the top right corner evaporates liquid in a chamber above the silicon, which then transfers heat to two heatsinks: one is a large plate over the battery, beneath the kickstand; and the other is accompanied by a fan in the top left corner.

    Both the large plate and the fan dissipate the heat in these areas, condensing the liquid that then returns to the processor. Crucially, the use of two heatsinks spreads the heat around the body of the Surface, reducing hotspots. The large plate over the battery also helps reduce the thermal load on the system fan, which means it won't need to spin up and create noise as often as in the Surface Pro 3.

    A similar hybrid liquid cooling solution will apparently be used in the Lumia 950 and Lumia 950 XL, although it'll be interesting to see how Microsoft will cram this type of cooler inside the much smaller body of a phone.

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  2. Skidmarksdeluxe

    Skidmarksdeluxe TS Evangelist Posts: 8,647   +3,274

    Impressive how they've managed to cram heatpipes into such a limited space, even more so for the phones.
  3. Burty117

    Burty117 TechSpot Chancellor Posts: 3,144   +911

    Indeed, Looking forward to seeing the insides of the Lumia 950 XL, that's a tiny space to put any water in!
  4. Wonder Mike

    Wonder Mike TS Rookie

    How does the liquid get back to the reservoir? The system isn't a circuit, and there doesn't appear to be a pump, are we supposed to shake it like an etch a sketch?
  5. Skidmarksdeluxe

    Skidmarksdeluxe TS Evangelist Posts: 8,647   +3,274

    Vapour (English spelling) chambers and heatpipes were to my knowledge usually partially filled with alcohol but that may have changed since.
  6. Skidmarksdeluxe

    Skidmarksdeluxe TS Evangelist Posts: 8,647   +3,274

    Convection most likely.
  7. Peter Farkas

    Peter Farkas TS Addict Posts: 272   +88

  8. gregzeng

    gregzeng TS Enthusiast Posts: 48

    Smartphones with rapid charging, like my Samsung Galaxy S6, can get quite hot to hold. Cooling will become the limiting factor as miniaturization progresses. Add air-tight-sealing needed for dust and water protection, and we should see more use of these technologies in high performance handheld devices.
  9. shannon99

    shannon99 TS Rookie

  10. dahumansponge

    dahumansponge TS Rookie

    YES shake it out of frustration cause the cooling system does not help

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