4 ms·

What about submerging it in mineral oil?

• chadgeidel 15y ago
  The specific heat of mineral oil (1.67 kJ/kg.K) [1] isn't much better than air (1.0 kJ/kg.K) [2] when considering the difficulty of using a liquid. If you are going to use a liquid - water is a much better heat transfer medium (3.93 kJ/kg.K) [3]. 1: http://www.engineeringtoolbox.com/specific-heat-fluids-d_151.html http://www.engineeringtoolbox.com/specific-heat-fluids-d_151... (search for "mineral") 2: http://www.engineeringtoolbox.com/air-specific-heat-capacity-d_705.html http://www.engineeringtoolbox.com/air-specific-heat-capacity... 3: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html
  • lutorm 15y ago
    The difference in specific heat is only a factor of 2. The big difference is in the density, which is about a factor of 1000 larger for liquids over air at atmospheric pressure. (However, mineral oil has much higher viscosity than water, which I'm not sure is what you want as it suppresses convection. I guess it's a question of whether you take that over the non-conductivity.)
  • biot 15y ago
    Water may be better at transferring heat, but there is the slightly undesirable effect that it shorts out your electronics and causes corrosion. Don't try this using water: http://youtu.be/PtufuXLvOok?t=2m10s http://youtu.be/PtufuXLvOok?t=2m10s
    • chadgeidel 15y ago
      Although I can't watch the video at work - I assume it's one of the many videos where the entire motherboard is submerged in mineral oil. Certainly that's the case, and it's why overclockers have been trying this for over a decade. It's just a problem with moving the heat away from a very concentrated area of the die. As lutorm observed, the viscosity (combined with the inability to transfer heat quickly) ends up preventing an efficient mineral oil based cooling solution.