Posted by chhum 2 days ago
How would that even be possible?
If so, why?
If not, does it matter how much water is used?
Even if seawater was easy to use and datacenters were near the shore, it would produce very saline brine which would be difficult to safely get rid of.
HN commentary on water use by so-called "tech" companies usually includes a number of mindlessly-parroted, bad faith "arguments"
One of these is to try to compare the new (additive) water use by non-essential data centers with existing (non-additive) water use by agriculture
Putting aside that (a) data centers are non-essential and not comparable to food, water or shelter and (b) agricultural use is not new, these "arguments" are also ignoring that (c) the so-called "tech" companies are trying to hide the data
Employees of these so-called "tech" companies might be experiencing guilt over this dishonest tactic, but not enough to make them quit
When their employer hides the data this makes accurate comparisons, e.g., to existing water use by other recipients, difficult if not impossible
Does agriculture also try to hide its water use
If it did, then HN comments could not attempt bad faith comparisons
Because there would be no data to cite
We should question the motives of whoever orchestrated a "story" out of this non-story and is pushing it in the media. It obviously isn't being done in good faith.
Isn't there some better way we can, perhaps, turn some of the heat back into something useful? Maybe heat a building? Or turn it back into electricity. It doesn't have to be an efficient conversion because it's now 100% wasted.
I'm a big fan of district heating, but it's something that needs to be built before the datacenter is. It also doesn't really work well if the datacenter isn't in an already cool region.
> Or turn it back into electricity.
The temps aren't high enough to do that easily. You need boiling water to generate electricity, and chips don't like running at or above 100C.
It's possible you could use a heat pump to turn hot water into boiling water, but that will stop working when temps get out of band. You might be able do it with a sterling engine, but you'd, ironically, need a supply of cool water to keep those running.
I think it could be higher with germanium semiconductors, as you could run them at a higher temp and get superheated steam
From https://www.usgs.gov/water-science-school/science/total-wate...:
> Water use in the United States in 2015 was estimated to be about 322 billion gallons per day (Bgal/d), which was 9 percent less than in 2010.
It doesn't seem to be very much water at all.