Live data from Hacker News

Amazon strategised about keeping water use secret

source-material.org

11–20 of 242 posts

Re: Amazon strategised about keeping water use secret

#11

Water use is a pretty close proxy for power use which is a pretty close proxy for how much computation is happening. I can totally see why a company wants to keep this info secret. Competitors would really like to know.

Yes if we squint really hard then this could be the reason. It could also be because it's a PR disaster.

Re: Amazon strategised about keeping water use secret

#12
post #4

Is data center water use not closed loop? If not, why?

They take in ambient air and release 100% humidity warmer air, basically a giant server-heated humidifier.

You could spend more electricity if needed to up the airflow to get the same cooling power without humidifying.

Re: Amazon strategised about keeping water use secret

#13
post #2

Is this water even “used” in the same sense that water is used for bathing or agriculture? Where does the water go? If they simply take in cold water and release hot water, that water is still available for other uses. Or do data centers use evaporative cooling just like power plants?

Datacenters can use a few different kinds of liquid cooling, including the one you describe. It varies quite a bit by geography.

Re: Amazon strategised about keeping water use secret

#14
post #6
post #2

Is this water even “used” in the same sense that water is used for bathing or agriculture? Where does the water go? If they simply take in cold water and release hot water, that water is still available for other uses. Or do data centers use evaporative cooling just like power plants?

> Or do data centers use evaporative cooling just like power plants? Yes. Not always, but evaporative cooling is much more energy efficient than heat exchange to outside air. That said, stories about data center water use are a distraction from much bigger water consumers like golf courses and agriculture (e.g. to ship alfalfa to the middle east).

> That said stories about data center water use are a distraction from much bigger water consumers

That's something of a fallacy of relative privation. When water is scarce, all frivolous uses should be under scrutiny. The others you mention have been well-known for a long time. The current stories simply highlight a new consumer people haven't thought of before.

Re: Amazon strategised about keeping water use secret

#15

Water use is a pretty close proxy for power use which is a pretty close proxy for how much computation is happening. I can totally see why a company wants to keep this info secret. Competitors would really like to know.

You think that's more of a concern than public backlash with NIMBYs and local governments?

Re: Amazon strategised about keeping water use secret

#16
post #7

Why do companies actively lie in their advertising about being eco-friendly, instead of just keeping a low profile? Is it because we tend to focus only on current events and quickly forget their past track record? Indeed, if people soon forget the lies, the risk is minimal.

One reason is that large institutional investors or lenders enforce certain agendas by only giving money to companies that meet certain criteria. Thus companies will posture themselves as meeting those qualities to attract money and investment.

It’s an explanation of why so many companies suddenly appeared to go “woke”, or why they did a complete 180 when the political climate changed. Even powerful companies like Apple must grovel for favor.

Re: Amazon strategised about keeping water use secret

#17
post #6
post #2

Is this water even “used” in the same sense that water is used for bathing or agriculture? Where does the water go? If they simply take in cold water and release hot water, that water is still available for other uses. Or do data centers use evaporative cooling just like power plants?

> Or do data centers use evaporative cooling just like power plants? Yes. Not always, but evaporative cooling is much more energy efficient than heat exchange to outside air. That said, stories about data center water use are a distraction from much bigger water consumers like golf courses and agriculture (e.g. to ship alfalfa to the middle east).

Even in case of evaporative cooling the water is not used. It's returned to the environment.

Re: Amazon strategised about keeping water use secret

#18
post #6

Earlier quoted context omitted.

> Or do data centers use evaporative cooling just like power plants? Yes. Not always, but evaporative cooling is much more energy efficient than heat exchange to outside air. That said, stories about data center water use are a distraction from much bigger water consumers like golf courses and agriculture (e.g. to ship alfalfa to the middle east).

Even in case of evaporative cooling the water is not used. It's returned to the environment.

While technically true, if your datacenter is in Phoenix and you just consumed a few acre feet of water to raise the relative humidity by 0.000001%, for all intents and purposes that was a massive waste of water.

Re: Amazon strategised about keeping water use secret

#20
post #7

Why do companies actively lie in their advertising about being eco-friendly, instead of just keeping a low profile? Is it because we tend to focus only on current events and quickly forget their past track record? Indeed, if people soon forget the lies, the risk is minimal.

One reason is that large institutional investors or lenders enforce certain agendas by only giving money to companies that meet certain criteria. Thus companies will posture themselves as meeting those qualities to attract money and investment. It’s an explanation of why so many companies suddenly appeared to go “woke”, or why they did a complete 180 when the political climate changed. Even powerful companies like Ap…

Oh, I didn't know it worked that way. Thank you for the information.
Post reply on HN