>>105954378
>Why can my engine run on a closed cooling cycle but a datacenter can not?
Because it doesn't need to and it's cheaper not to. It doesn't need to because it's connected to a pipe carrying water that doesn't matter if it gets heated up by a few degree. Your car need to move.
>>105954579
>Do they use purified drinking water? I get you dont want shit water but something in between. Can't they just build them next to a river or force them to process the water after use.
They use municipal water separated from the datacenter's cooling loop by a heat exchange. The pipes that supply the water to the city have a small dog leg that runs up into the datacenter, pick up a few degrees of heating the return back to the watermains dumping the heat into the ground, or maybe slightly warming up the water at the tap.
>>105955745
>>dood, just drink the industrial waste, bro!
It's slightly warmer tap water.
>>105956348
>I think I read somewhere that they're usually going with the evaporative cooling route.
I strongly doubt that, towers are big and expensive to build. A datacenter in a town already has cheap access to cooling water.