←back to thread

Google's Liquid Cooling

(chipsandcheese.com)
399 points giuliomagnifico | 1 comments | | HN request time: 0.238s | source
Show context
michaelt ◴[] No.45017512[source]
> TPU chips are hooked up in series in the loop, which naturally means some chips will get hotter liquid that has already passed other chips in the loop. Cooling capacity is budgeted based on the requirements of the last chip in each loop.

Of course, it's worth noting that if you've got four chips, each putting out 250W of power, and a pump pushing 1 litres of water per minute through them, water at the outlet must be 14°C hotter than water at the inlet, because of the specific heat capacity of water. That's true whether the water flows through the chips in series, or in parallel.

replies(4): >>45017544 #>>45017835 #>>45017973 #>>45021855 #
1. JonChesterfield ◴[] No.45021855[source]
The equations all work out OK though since one can go substantially above a litre a minute at pressures which are still viable. The standard 18W thing for desktops is about ten times that.