State & Local Government vs. Datacenters

fractl

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And cryptocurrencies. In fact there was a Super Bowl ad starring Larry David that was literally "be afraid of missing out!"

I don't see crypto revolutionizing anything but crime and rug pulls.
Data centers that serve up videos, such as Netflix or Amazon, aren’t nearly as energy intensive as those used for AI. AI data centers are close to bitcoin mining for energy consumption (and waste).
 

concernUrsus

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Data centers that serve up videos, such as Netflix or Amazon, aren’t nearly as energy intensive as those used for AI. AI data centers are close to bitcoin mining for energy consumption (and waste).

I would not say AI data centers is close to bitcoin. There are real usage and value to AI data center. The value is just hard to measure right now. We are at the early Uber/DoorDash phase of the investment, everything is heavily subsided by PE and FANG's money. We would not know how valuable it is until we get to phase these companies want actual profit. Also, if all we end up is a lot of AI boy/girlfriends or meme video (or worse use for monitoring people and proproganda), then it would be negative society value even if there is profit in them.
 
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Lt_Storm

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Nobody who's not compelled to it really wants supply chain auditing. No questions asked about where that came from or how it was paid for is much more convenient.
I don't know about that. For instance, I might care that my chicken wasn't fattened up using antibiotics. And, without supply chain auditing, that would be impossible. Instead, without supply chain auditing, it would also be unprofitable. And that's hardly the only such issue I might care about.

But, then, many investors would prefer I just think my chicken wasn't fattened with antibiotics. And so would have problems with any real supply chain auditing. So, you aren't far wrong, especially in this economy.
 

etr

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Datacenters that are already working are sufficient for everything AI is already doing. Vast increases in computing are necessary only if AI is going to do vastly more than it already is.

That's not true: Anthropic doesn't have the compute to support inference on Mythic and as a result is starting to lag again behind OpenAI. Even now, they have 5-hour usage quotas even for people on the $200/month Max plan. They clearly can't support the inference that these people would otherwise do.

You are literally arguing against a tautology here. If the data center base was insufficient to do what is already being done, then less would necessarily be getting done. That (some) folks want more is a separate "issue".

Let's assume--for a moment--that there will be a technological break-through in AI that delivers real transformation in the time frame the boosters suggest. If a leader knew that was what we could expect, shouldn't that leader put as much--if not much more!--emphasis on helping society navigate that transformation as they do on accelerating it?

I've seen some tut-tutting of new graduates booing commencement speakers from the tech industry putting AI front and center in commencement ceremonies. Many of those graduates will have been on a 5 year program and incurred significant debt investing in themselves. To put that 5 year time in perspective, my rig is younger than that, and I certainly did not pay current prices. So any time a tech industry speaker put the onus to adapt to AI-influenced market conditions that negatively impact their employment prospects, they are implicitly chiding the graduates for any struggle to meet challenges that those same tech industry leaders failed to forsee when the graduates embarked on their college programs.

The China boogey man on this front is getting old, too. Theoretically, the Western lead here includes AI software/models, chips (nVidia), and chip manufacturing technology (ASMR). If the west cannot leverage those strengths to maintain a lead, what are more power plants and data centers going to do by comparison?

I'm sure the canned response from AI technology leaders would be, "Not my bag." I think the response should be, "Well, then, the state needs to work with technologists who can see the bigger picture."
 

m0nckywrench

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My current employer wrote everything hinting at green and energy-efficiency out of the company values about the same time management joined the AI cult.
Bad cult replaces good cult, but for most people (who are not techies in any respect) both are cults because they want to conform to fashion. Fashion's their condition of engagement.

Those wanting positive change need their target audience to feel they've special insight by supporting that change.
 

Wheels Of Confusion

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Let's assume--for a moment--that there will be a technological break-through in AI that delivers real transformation in the time frame the boosters suggest. If a leader knew that was what we could expect, shouldn't that leader put as much--if not much more!--emphasis on helping society navigate that transformation as they do on accelerating it?
Instead we have OpenAI arguing in court that it's not their fault that their chatbot keeps cheering people through suicide and lethal drug use. Should have read the TOS you agreed to when you signed up to use our murdercoach!
 

ZnU

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1) AI Datacenters are no big deal. (Numbers placed on build-out plans where they consume more power than an entire state and the problem of water depletion, already critical in many areas, is left entirely un-handwaved except that it's "water vapor.")

Data centers do, in fact, have pretty minimal externalities compared to other industrial-scale facilities. They don't dump mercury in the rivers or belch black smoke into the air. Yes, they consume power and water, but they buy these at market prices. It seems like you're implying these market prices don't reflect externalities associated with power and water production? Okay. I'm sure that's true in many cases. What's the proper solution to that? Correcting the prices? Or retaining the incorrect prices, but banning additional consumption to minimize the damage caused by those incorrect prices? Because opposing data centers on this basis is the latter.

2) "Mostly clean energy" Are the techbros building their own solar and wind farms for all these datacenters or are they relying on the same grid as the rest of us?

Most larger projects now intend to generate their own power, or are specifically contracting for new capacity. While some of this will be gas, it'll likely increasingly shift to solar due to multiyear backorders on gas turbines. SpaceX, a few days ago, announced plans to build a solar factory in Texas that will scale to 10 GW of panels/year. Anticipation of data center demand is also driving renewed investment in fission, and recent regulatory reforms may actually make it possible to build nuclear plants again.

Big picture, clean energy already completely dominates capacity additions in the world's major economies. We've already turned the corner on this. The assumption that using electricity at scale is inherently problematic because of climate change is rapidly becoming invalid.

3) LLMs and image generators are the only way to progress technologically and economically. This is ludicrous on its face.

So we ban the data centers and… then what? The same capital flows to something else that provides a similar return? I legitimately don't understand how you imagine this working. This is what's actually generating growth right now. If you cancel it (which seems like it would be wildly unprecedented, by the way), there's no mechanism by which something else automatically shows up to replace it. You just don't get that growth.

You seem to have a funny definition of "works reasonably well" as the income inequality gap continues to widen in the US. It's like you're not even living on the same planet as the rest of us.

Right, silly me. I haven't been posting in SB much lately, and I momentarily forget that describing the model that has produced the societies with the most (and most broad-based) prosperity of any that have ever existed on Earth as working "reasonably well" is the sort of thing that's controversial around here.
 

tigreroars

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Data centers do, in fact, have pretty minimal externalities compared to other industrial-scale facilities. They don't dump mercury in the rivers or belch black smoke into the air. Yes, they consume power and water, but they buy these at market prices. It seems like you're implying these market prices don't reflect externalities associated with power and water production? Okay. I'm sure that's true in many cases. What's the proper solution to that? Correcting the prices? Or retaining the incorrect prices, but banning additional consumption to minimize the damage caused by those incorrect prices? Because opposing data centers on this basis is the latter.

Again, I argue against "minimal" externalities.

Proper "industrial" comparison would be an airport without the necessary infrastructure for passengers or freight. Especially with the natural gas turbines because the local electrical authority isn't approving electrical hookup to the grid. And the water usage of an 18 hole golf course.

Just to quote the data center hysteria thread:

I'm not sure that anyone saying a datacenter is no big deal and is okay to deploy in a residential zone really understands this. We were one of the first customers to receive a DGX SuperPOD, which is loud enough to damage your hearing (That's the page for an H100 SuperPOD but obviously ours was an A100). Nvidia warns customers that these systems will produce about 100 dB of noise when running under load, and this needs to be planned for. Spending any substantial time near it when it was firing was enough to leave me with a headache, enough so that we asked the developers to hold off on tasking it if we needed to work in its proximity. You could hear it in the hallway through the 1.5" thick steel fire door.

I wouldn't go so far as the say the whole building would become useless, but I would never want to live on the neighboring floors. We should all know by now that constant, chronic noise increases stress, which shouldn't really acceptable to impose on people in a residential setting.

I think all this kind of misses the problem though, which is that datacenters want to operate as cheaply as possible, which is diametrically opposed to being a good neighbor and citizen. Few people would be complaining about datacenters if they invested in the local infrastructure, only built in a scale reasonable for the location, installed proper noise isolation, and all that. Instead they're increasing noise pollution, running illegal power plants, and generally diminishing the quality of life for everyone around them. I do believe you can build a modern datacenter that doesn't make everyone around it hate your guts, but that costs money, and the people making the decisions don't have to live with the consequences, so they won't willingly spend that money. They need to be forced to, which is the equivalent of forcing them out, so people are just skipping the middle step and forcing them out.
 

Shavano

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Data centers do, in fact, have pretty minimal externalities compared to other industrial-scale facilities. They don't dump mercury in the rivers or belch black smoke into the air. Yes, they consume power and water, but they buy these at market prices. It seems like you're implying these market prices don't reflect externalities associated with power and water production? Okay. I'm sure that's true in many cases. What's the proper solution to that? Correcting the prices? Or retaining the incorrect prices, but banning additional consumption to minimize the damage caused by those incorrect prices? Because opposing data centers on this basis is the latter.
quadrupling the electrical power demand for the State of Texas isn't minimal.
The externalities just of that would include pricing all other industry out of the power market.
 

Shavano

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of course not all states are opposing datacenters. Some of them are enabling them, so they can profit.
He* cosponsored two bills that enabled the land deal between Meta and the state. And he voted “yea” on two additional bills that provided the trillion-dollar tech company with tax breaks worth an estimated $3.3bn.

Now, a Floodlight investigation has found that while Morris used his political position to advance the project, he and his business partners were buying and selling the land around it over the past 15 months.
* State Senator John "Jay" Morris.
 

concernUrsus

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quadrupling the electrical power demand for the State of Texas isn't minimal.
The externalities just of that would include pricing all other industry out of the power market.

The data centers can probably build with environment friendlier approach than a steel mill. The problem is the current data centers are not built with any environmental protection in mind. There are probably local in Texas that have a lot of solar and wind power that can benefit data centers. data centers can probably be sound proofed as well. There are also different way to cool these centers.

The current issues is everyone is rushing to build and trying to externalize the cost to public as much as possible.
 

timby

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The data centers can probably build with environment friendlier approach than a steel mill. The problem is the current data centers are not built with any environmental protection in mind. There are probably local in Texas that have a lot of solar and wind power that can benefit data centers. data centers can probably be sound proofed as well. There are also different way to cool these centers.

The current issues is everyone is rushing to build and trying to externalize the cost to public as much as possible.

The problem with your position is that you're going up against laws of thermodynamics. There are only so many ways to power and cool a gigantic farm of server racks that are kicking out over 1,000 watts per chip, and there are only so many (and a lot fewer) ways to do so effectively while also minimizing the impact to the surrounding area.
 
The problem with your position is that you're going up against laws of thermodynamics. There are only so many ways to power and cool a gigantic farm of server racks that are kicking out over 1,000 watts per chip, and there are only so many (and a lot fewer) ways to do so effectively while also minimizing the impact to the surrounding area.
The problem with your position is that we're asking the data centers to go with the more expensive options to limit externalities rather than trying to regulate them to break thermodynamics.


As for cooling:

The one most of us should be familiar with is the closed loop. The example here is your home air conditioner, particularly the window models. Water usage is somewhat incidental i.e. washing down the heat exchanger fins to restore efficiency, especially in dusty environments.

Then there's the evaporative coolers a.k.a. swamp coolers. These work by drawing out heat when water evaporates. These work best in arid environments a.k.a. deserts. This saves a fair amount in electricity.

Then the most water intensive use would be city water cooling. It's generally a once through system and uses the fact that water generally gets pumped in at 50F and raises the temp to 80F before being dumped into the sewer.

I'd like the data centers to be regulated to use closed loop cooling. This is both more expensive upfront and ongoing than city water cooling.


As for power, the data centers could go and make power purchase agreements or they can do the less risky (and costly) to the data center by bullying the local power regulators to hook up to the grid (which makes the power generation someone else's problem).


Finally, my bugaboo, acoustics. You can install noise barriers, adjust fan sizes, have set backs, etc. or you can have what ever 1/4" drywall that they install between cheap apartments where you can hear your neighbors all the time.


So, none of these solutions are physically (or thermodynamically) impossible. Some need to be implemented in the building phase. They all do cost money, both in building and on going operating costs. So, I'd rather have them be put into the go/no go decision before waiting for the consequences and the only way to fix it is to either close down the data center or tear it down and try again.
 
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Shavano

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The data centers can probably build with environment friendlier approach than a steel mill. The problem is the current data centers are not built with any environmental protection in mind.
and they won't unless they are compelled to. Why would they? When has capital ever?
There are probably local in Texas that have a lot of solar and wind power that can benefit data centers. data centers can probably be sound proofed as well. There are also different way to cool these centers.

The current issues is everyone is rushing to build and trying to externalize the cost to public as much as possible.
Yes. Why make what they can take from someone else by paying a few people to see it their way?
 

papadage

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The problem with your position is that we're asking the data centers to go with the more expensive options to limit externalities rather than trying to regulate them to break thermodynamics.


As for cooling:

The one most of us should be familiar with is the closed loop. The example here is your home air conditioner, particularly the window models. Water usage is somewhat incidental i.e. washing down the heat exchanger fins to restore efficiency, especially in dusty environments.

Then there's the evaporative coolers a.k.a. swamp coolers. These work by drawing out heat when water evaporates. These work best in arid environments a.k.a. deserts. This saves a fair amount in electricity.

Then the most water intensive use would be city water cooling. It's generally a once through system and uses the fact that water generally gets pumped in at 50F and raises the temp to 80F before being dumped into the sewer.

I'd like the data centers to be regulated to use closed loop cooling. This is both more expensive upfront and ongoing than city water cooling.


As for power, the data centers could go and make power purchase agreements or they can do the less risky (and costly) to the data center by bullying the local power regulators to hook up to the grid (which makes the power generation someone else's problem).


Finally, my bugaboo, acoustics. You can install noise barriers, adjust fan sizes, have set backs, etc. or you can have what ever 1/4" drywall that they install between cheap apartments where you can hear your neighbors all the time.


So, none of these solutions are physically (or thermodynamically) impossible. Some need to be implemented in the building phase. They all do cost money, both in building and on going operating costs. So, I'd rather have them be put into the go/no go decision before waiting for the consequences and the only way to fix it is to either close down the data center or tear it down and try again.
Every closed loop needs an open loop to dump the heat in any locale where the temp rises above 80 degrees, which is all of the lower 48 states.

These data centers take potable water and dump it at the end. And many of them are bikbg built where this will cause water shortages.

And the energy used keeps fossil fuel prices up as they compete for generation and grid interconnects.
 
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Lt_Storm

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Every closes loop needs an ooen loop to dump the heat in any locale where the temp rises above 80 degrees, which is all of the lower 48 states.

These data centers take potable water and dump it at the end. And many of them are bikbg built where this will cause water shortages.

And the energy used keeps fossil fuel prices up as they compete for generation and grid interconnects.
It's entirely possible to design a closed loop cooling system that operates well in excess of 100°F, you just need a big-enough super-white radiator to expel the heat. Hell, if you used active cooling, you could even get by with a smaller radiator. But, by comparison to a cooling tower, that would be super expensive, so cooling towers are much preferred. And, of course, cooling towers are basically swamp coolers.
 

Shavano

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Every closes loop needs an ooen loop to dump the heat in any locale where the temp rises above 80 degrees, which is all of the lower 48 states.

These data centers take potable water and dump it at the end. And many of them are bikbg built where this will cause water shortages.

And the energy used keeps fossil fuel prices up as they compete for generation and grid interconnects.
Silicon works acceptably at temperatures of +85C (of the heat sink), which means the semiconductor is signifcantly hotter than that. How much hotter has to do with your package and heat sink design. Semiconductors can typically operate with junction temperatures up to 125C. But lifetime decreases as you get to higher temperatures, and there's a tradeoff between hardware lifetime and operating temperature. That's moderated by expected obsolescence. If you expect your useful lifetime before you're going to want to replace the hardware anyway is 5 years, you want a small percentage (nonzero) to fail in the first 5 years at your operating temperature.

But anyway, +85C can be effectively cooled to air that's at any temperature you can get on Earth's surface. Max for environmental temperature most places is under 45C. The cooler the air the better.

But yes of course it's cheaper to dump the heat in water and dump the water, if there's plenty of available cool water. The question for cities and states is do they have plenty of water and don't mind somebody dumping a gigawatt of heat in it? Warming water causes damage to ecosystems. So does warming air, but the warmer air dissipates over a larger area.
 

Crolis

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I mean I would still oppose it on principle but if these companies want to bypass public backlash against them I’d suggest start heavily bribing the communities and their voters where you want to build a data center in and not through some obfuscated tax dollars. I realize bribing politicians is cheaper but that’s not really effective when they get voted out due to approving these things. Or they can continue to be considered a scourge I guess.
 
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timby

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I mean I would still oppose it on principle but if these companies want to bypass public backlash against them I’d suggest start heavily bribing the communities and their voters where you want to build a data center in and through some obfuscated tax dollars. I realize bribing politicians is cheaper but that’s not really effective when they get voted out due to approving these things. Or they can continue to be considered a scourge I guess.

That's what was happening here in Dubuque County. Back-channel discussions were happening between the county, a developer who wanted to construct a massive data center, and the people who own the property the data center would have gone on, here:

1779932575865.png


Only four families own these tracts of land, and they each had agreed to take $1.5 million in lump sum bribespayments from the developer in exchange for handing the land over. It was, by one account from someone on county staff I spoke to yesterday, an absolute done deal and all that was waiting was for the developer to actually submit their proposal and permitting paperwork to the county so the land transfers could begin.

Well, someone talked, the citizenry revolted and now we have our twelve-month moratorium on all data center projects in the county.

So they're already working on buying off the populace; in this case, they just focused too narrowly in trying to buy off the landowners in particular instead of the citizenry in general.
 

karolus

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It's entirely possible to design a closed loop cooling system that operates well in excess of 100°F, you just need a big-enough super-white radiator to expel the heat. Hell, if you used active cooling, you could even get by with a smaller radiator. But, by comparison to a cooling tower, that would be super expensive, so cooling towers are much preferred. And, of course, cooling towers are basically swamp coolers.

Per the bolded, that depends on whether they are open or closed circuit. Closed circuit types recirculate the water, so far less is used.
 
Every closed loop needs an open loop to dump the heat in any locale where the temp rises above 80 degrees, which is all of the lower 48 states.
Huh?

I'm talking about air cooled air conditioners. These are generally built to ANSI/AHRI Standard 550/590, which calls for 95F ambient temperature. In that article, they say that they design to 105F for Austin.

Daikin will sell you a 565 ton air cooled chiller.

A 60kw AI data cabinet produces approximately 60kw of heat, which is ~205,000 btu/hr or ~17 tons of cooling. Add in a 30% buffer, let's call it ~22 tons of cooling required. So that air cooled chiller (i.e. closed loop), should cool about 20 to 25 AI data racks that produce 60kw of heat (or fewer racks if you insist on putting your data center in Tuscon, AZ).

So, will you need a shit ton of air cooled chillers? Yes. Will that be expensive? Most certainly more expensive than the water cooled designs. Will it produce a lot of noise, you bet your damn pants. Is the "open loop" just air? Sure, but you're not using a lot of water.
 

Lt_Storm

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Per the bolded, that depends on whether they are open or closed circuit. Closed circuit types recirculate the water, so far less is used.
Closed circuit cooling towers work by spraying water onto a closed circuit of pipes circulating working fluid in order to cool the coolant to near the wet bulb temperature. So, while they use noticeably less water than a once through system, they still use quite a bit of water. That said, I will correct myself, dry (and hybrid towers that operate both wet and dry) cooling towers are a thing, so, there's that. But, they aren't the most common reference.

All of which is to say: closed circuit has nothing to do with if the heat exchange system is wet or dry. It just means that there is at least one.
 

karolus

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Closed circuit cooling towers work by spraying water onto a closed circuit of pipes circulating working fluid in order to cool the coolant to near the wet bulb temperature. So, while they use noticeably less water than a once through system, they still use quite a bit of water. That said, I will correct myself, dry (and hybrid towers that operate both wet and dry) cooling towers are a thing, so, there's that. But, they aren't the most common reference.

All of which is to say: closed circuit has nothing to do with if the heat exchange system is wet or dry. It just means that there is at least one.
You're right. I should have been more correct in my terminology here.
 

Coriolanus

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The problem with your position is that you're going up against laws of thermodynamics. There are only so many ways to power and cool a gigantic farm of server racks that are kicking out over 1,000 watts per chip, and there are only so many (and a lot fewer) ways to do so effectively while also minimizing the impact to the surrounding area.
Helsinki had an interesting approach where the heated water used to cool datacenters are stored in storage tanks and then piped to surrounding homes to use as hot water and for home heating. You might even use some of it with thermoelectric generators to recapture some of the heat as electricity.
 

wrylachlan

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Helsinki had an interesting approach where the heated water used to cool datacenters are stored in storage tanks and then piped to surrounding homes to use as hot water and for home heating. You might even use some of it with thermoelectric generators to recapture some of the heat as electricity.
The tension there is it requires a) the data center to be sited near enough to a residential area that the hot water can get from the data center to the residential area while still hot and b) small enough that it’s not generating more heat than can be used. And if B is the case that means it’s necessarily smaller than optimal since these data centers really thrive when you can get them to scale.

So 100% we should try to make as much use as possible of the excess heat generated. That seems obvious. And we’ve likely not scratched the surface of the various ways that waste heat could be used. But in order to unleash creativity in the way that waste heat is used, we need to internalize the externality - make it expensive for data centers to dump heat into the environment.
 

papadage

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OK guys.

We know we can force active cooling using football-stadium-sized radiators. But those are prohibitive at the power densities we are talking about here. A solely air-cooled system would require 15% to 25% more power per MW of compute, and much lower rack densities as a 100 kW rack can't be cooled by air, and if cooked my a closed loop, the air required to cool the liquid would need to be the size of a football stadium.
 

papadage

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Huh?

I'm talking about air cooled air conditioners. These are generally built to ANSI/AHRI Standard 550/590, which calls for 95F ambient temperature. In that article, they say that they design to 105F for Austin.

Daikin will sell you a 565 ton air cooled chiller.

A 60kw AI data cabinet produces approximately 60kw of heat, which is ~205,000 btu/hr or ~17 tons of cooling. Add in a 30% buffer, let's call it ~22 tons of cooling required. So that air cooled chiller (i.e. closed loop), should cool about 20 to 25 AI data racks that produce 60kw of heat (or fewer racks if you insist on putting your data center in Tuscon, AZ).

So, will you need a shit ton of air cooled chillers? Yes. Will that be expensive? Most certainly more expensive than the water cooled designs. Will it produce a lot of noise, you bet your damn pants. Is the "open loop" just air? Sure, but you're not using a lot of water.
OK. Niw do the math on a 700 MW datacenter. That’s a factor of 10K in size, or 220,000 tons of cooling. Find even one data center at that scale using air cooling.

I’ll wait.

I bet you not a single one is being built that way as

1. It’s much more expensive.

2. Any power budget that can is being put into compute and not cooling.
 

w00key

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... Are we still on that stupid debunked water use crisis?

https://newsletter.semianalysis.com/p/from-tokens-to-burgers-a-water-footprint

Colossus 2, one of the largest AI datacenters, uses as much water as 2.4 burger restaurants. 2.7 billion tokens to 1 burger is the conversion rate.

And the water it uses? Reclaimed municipal waste water. It would have been dumped anyway, now it's recycled, and provides more than enough to run the hybrid adiabatic chillers.


If you want to rage about water use, rage about agriculture. Alfalfa uses 500 gallons per pound, for animal feed, and often exported. Saudi Arabia banned growing that crop yet imports "concentrated water" from the dryest states. Just think about how silly that is. That crop needs sun yes, more is better, but is also really bad at conserving water. But due to a historical error, water rights, and use it or lose it rules, we just flood the dessert to grow cattle feed.


Colosus 2 uses about the same as 200 acre of alfalfa. Or half of the average 400 acre farm in the west. And it's located in the exact opposite location, climate wise, along the Mississippi River, a region characterized by high humidity, heavy annual rainfall, and massive water abundance.


I could go on. But really, if you are to build something that needs serious amounts of water, duh you are placing it in a place where it's not stupid hot, has plenty of water, and better yet make it "water neutral" by reclaiming it out of the sewers. A gallon here is not a gallon in Arizona or Utah. The Colorado river system is in serious deficit and these two states grow 2.3+2.5 million tons of that stuff, requiring heavy irrigation, and uses the water of 2825x Colossus 2's.

Now that's what I call a waste. This isn't even a rounding error even before you add a conversion rate between gallon in the dessert vs a gallon in a wet area.
 
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Ananke

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We already have worked examples of how to cool industrial-sized heat sources - thermal power stations. Nuclear stations are probably the best point of reference, because they tend to both have the lowest thermal efficiency, as well as relatively low exhaust temperatures: for example, Hinckley C is due to dump ca. 6GW of heat into the Bristol Channel. Drax dumps ca 1.7GW of heat into both the atmosphere and the river Ouse. Once-through cooling doesn't need to consume high quality potable water.

If the cooling requirements come to dominate the costs - due to, for example, effective regulation or local opposition to resource limits, noise pollution etc - then it "just" becomes another factor to consider in proposing new sites - along with existing factors like available power, bandwidth/latency, workforce, zoning, etc.

What is most relevant is that data centres are held to at least the same standards as other industrial apparatus in terms of externalities. "Doing it on a computer" mustn't be allowed to be an acceptable excuse, nor must "but ai!!1!". Waste heat is just another form of pollution, like light, noise, particulates, chemical or nuclear contamination etc. Where it can (or must) be minimised, it should be. And what is still left should be held to comparable standards as existing industrial polluters (or, you know, preferably higher standards, that would be nice).

What must not be allowed to stand is repeating the argument that OpenAI etc have already abused: "our business models requires breaking the law, so we should be allowed to do just that", substitute for "breaking the law" as appropriate.
 

Shavano

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papadage

Ars Legatus Legionis
44,327
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... Are we still on that stupid debunked water use crisis?

https://newsletter.semianalysis.com/p/from-tokens-to-burgers-a-water-footprint

Colossus 2, one of the largest AI datacenters, uses as much water as 2.4 burger restaurants. 2.7 billion tokens to 1 burger is the conversion rate.

And the water it uses? Reclaimed municipal waste water. It would have been dumped anyway, now it's recycled, and provides more than enough to run the hybrid adiabatic chillers.


If you want to rage about water use, rage about agriculture. Alfalfa uses 500 gallons per pound, for animal feed, and often exported. Saudi Arabia banned growing that crop yet imports "concentrated water" from the dryest states. Just think about how silly that is. That crop needs sun yes, more is better, but is also really bad at conserving water. But due to a historical error, water rights, and use it or lose it rules, we just flood the dessert to grow cattle feed.


Colosus 2 uses about the same as 200 acre of alfalfa. Or half of the average 400 acre farm in the west. And it's located in the exact opposite location, climate wise, along the Mississippi River, a region characterized by high humidity, heavy annual rainfall, and massive water abundance.


I could go on. But really, if you are to build something that needs serious amounts of water, duh you are placing it in a place where it's not stupid hot, has plenty of water, and better yet make it "water neutral" by reclaiming it out of the sewers. A gallon here is not a gallon in Arizona or Utah. The Colorado river system is in serious deficit and these two states grow 2.3+2.5 million tons of that stuff, requiring heavy irrigation, and uses the water of 2825x Colossus 2's.

Now that's what I call a waste. This isn't even a rounding error even before you add a conversion rate between gallon in the dessert vs a gallon in a wet area.

Except that the reclaimed water plant has been put on hold indefinitely, so all the water for the foreseeable future is potable water drawn directly from the local aquifer. That's an aside from the unpermitted gas turbines that violate the Clean Air Act.

https://www.eenews.net/articles/xai-sidelines-major-water-reuse-project-as-ipo-looms/

Company executives promoted the water recycling plant amid repeated lawsuits and a congressional probe accusing it of skirting Clean Air Act requirements at its data centers. It sought federal permits for the recycling facility early on.

SpaceX CEO Gwynne Shotwell even touted the water reuse plant at a White House meeting with Trump in March, where xAI and other artificial intelligence executives agreed to build their own power generation in a bid to prevent electricity price increases for households. “It’s actually quite important,” Shotwell said, calling the future plant “state of the art.”

Some critics see ties to the upcoming stock market debut of xAI’s parent company, SpaceX, and a possible desire to tighten up on cost outlays or even a shift in focus to eventual space-based data centers, where water use wouldn’t be an issue.

The water reuse plant had been “the only goodwill proposition the company made toward the people of Memphis,” said KeShaun Pearson, executive director of Memphis Community Against Pollution, a grassroots environmental justice group that has campaigned against xAI over its use of gas turbines without appropriate Clean Air Act permits.


https://www.selc.org/news/xai-built-an-illegal-power-plant-to-power-its-data-center/

xAI’s power plant in Southaven has the potential to emit more than 1,700 tons of smog-forming nitrogen oxides (NOx) each year. The staggering emissions numbers likely make the facility the largest industrial source of NOx in the greater Memphis area, an area already failing to meet national smog standards. The illegal turbines also have the potential to release up to:

  • 180 tons of fine particulate matter,
  • 500 tons of carbon monoxide, and
  • 19 tons of formaldehyde—a toxic, cancer-causing chemical—each year.
“A data center should not be a potential death sentence for a community’s health. By looking to evade clean air laws to operate dirty turbines that emit pollution and known carcinogens, these companies are following a shameful, familiar pattern: asking Black and frontline communities to bear the toxic brunt of ‘innovation,’” said Abre’ Conner, NAACP Director of Environmental and Climate Justice.

Pollution from the turbines powering xAI’s second data center risks worsening air quality problems in the Memphis area, which is already failing to meet national standards for smog. Memphis was recently named an ‘asthma capital’ and both Shelby County, Tennessee, and DeSoto County, Mississippi, received an “F” for ozone pollution from the American Lung Association.

So let's not white-knight for these companies pushing externalities on local communities.
 
OK. Niw do the math on a 700 MW datacenter. That’s a factor of 10K in size, or 220,000 tons of cooling. Find even one data center at that scale using air cooling.

I’ll wait.

I bet you not a single one is being built that way as

1. It’s much more expensive.

2. Any power budget that can is being put into compute and not cooling.
Of course it's much more expensive in both more equipment upfront and ongoing electricity costs. That's why the data centers don't want to do it and why regulations need to do it to reduce the negative externalities.

I can't do the math on a 700 MW data center because you haven't told me how much is going to compute vs. cooling vs other electric usages. Really you have to look at the power usage effectiveness vs. water usage effectiveness.

Also Microsoft and Oracle are using closed loop chillers for their AI data centers. So, stop waiting.

Also, since you have liquid coolant to pump to and from the chillers, you can do it in 20 rack blocks. So instead of having one giant nuclear plant sized cooling tower, you have a farm of heat exchangers and fans.

Water usage is more critical in say Arizona or Texas than in Virginia or Iowa.

Extra power can be generated by new power plants. Photovoltaics would be ideal, nuclear isn't terrible.

Extra budget is the problem. Either the data centers pay for it or John Q Public. And my point is that I want the data centers to pay for it. I'm not breaking the laws of physics or thermodynamics here.

Edit: more that I look into it, I'm ready to say do it like Microsoft and not like xAI.
 
Last edited:

w00key

Ars Tribunus Angusticlavius
9,073
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400 MWh is enough heat to boil 555,000 liters of water. Every hour. Know any burger restaurants that do that?

Colossus

We will assume a Critical IT capacity of 400MW, a PUE of 1.15, and a utilization rate of 70%. This translates into 2.8 TWh of generated heat per year that must be rejected. Let’s also consider a wet operation time with adiabatic assist of 30%, given the cooling layout and Memphis climate, an evaporation rate of 0.45 gal/kWh and a adiabatic share of 70%, reflecting the heat that is actually handled via evaporation during adiabatic-assist operation. This leads to 267 million gallons of water evaporated during the cooling process in a year.

Burgers

Around 95% of the water footprint of the beef patties comes from the water the cattle consumes, mostly indirectly through irrigation used to grow alfalfa, corn, and other crops for feeding and raising the animal. As a result, big differences in beef water footprint can appear across regions. Some benefit from wetter climates where less irrigation is needed, while drier regions have much higher intensity. This is well illustrated in the paper we used as a data point, by Rotz et al (2019), where you can identify the blue water intensity (in L/kg) is substantially higher in the Southwest than in other regions of the US. Given In-N-Out’s West Coast presence and their claim that all beef is fresh and never frozen, we believe it’s reasonable to use these figures in our calculations. For the remaining ingredients we also used West Coast specific blue-water intensity estimates, such as for California fresh tomatoes and iceberg lettuce.

Putting it all together and considering the weight of each ingredient in a Double-Double burger, we get to a water footprint of 245 gals/burger, or 927 liters. That’s lower than our initial expectations, but while we don’t have full support for the calculations behind the public claims, we suspect those figures include green water footprint (a big part of cattle’s total water intensity) and skip nuances like intensity per carcass weight vs boneless beef.

Let’s get to the burger sales. Public sources indicate average store revenues in the order of $5.8M per year. Assuming burgers are 60% of revenue and an average sandwich price of $5.80, we get to around 600k “Double-Double equivalent” burgers sold per year. Multiply that by the water footprint per burger, and we get a total footprint per store of 147 million gals / year!

So wait, it's west coast beef water vs plentiful river delta water, so in actual climate damage, the burgers are worse than Colussus 2.


Almost a m3 of dessert water per burger, holy shit that's shameful. That's enough to water my veggies garden for a whole season, for 1 burger.

Yeah I'll just eat my grass fed Irish or Dutch beef thanks, at least most of the water just falls out of the sky, West coast beef causes environmental damage at a crazy scale.
 
  • Wow
Reactions: Bardon
quadrupling the electrical power demand for the State of Texas isn't minimal.
The externalities just of that would include pricing all other industry out of the power market.

A rise in prices due to a rise in demand isn't an externality, exactly. This effect is sometimes called a "pecuniary externality," as contrasted with a real externality. The distinction is not trivial. A real externality is definitionally an unpriced cost, and consequently the normal incentives of the price system won't act to reduce it. Real externalities are, in other words, a reliable source of market failure, where you expect government might have to step in.

On the other hand, prices rising in response to rising demand is a central feature of the price system. In the general case, it can be expected to induce a useful market response — incentivizing more supply, more efficient use, whatever. In this case, because data center operators themselves don't want to pay through the nose for power, and can anticipate the effects their demand will have, it is widely incentivizing them to build or specifically contract for new capacity.

Though supply and demand may get out of step in the short run, there's no reason to expect this process to raise prices long-term. It might even lower them. There are economies of scale in the production and distribution of power, after all. And higher demand can sustain more investment in R&D.
 
WaPo has an article about Virginia data centers creating sickness from the polution they provide is an interesting view of the dangers of giving data centers free reign in local areas.
A Washington Post free article

As data centers boom, Virginians breathe the exhaust of 10,000 diesel generators​

Pollution from generators at data centers could cause respiratory symptoms and deaths in the region, analysis for The Washington Post found.

From a local victim's experience:

Back in Virginia’s Data Center Alley, residents worry that the drive to feed the AI industry’s hunger for more electricity will mean the many gigawatts of diesel generators there will be fired up at a moment’s notice.
“I have woken up in the middle of the night congested when they are running them,” said Gregory Pirio, a 75-year-old who lives adjacent to the VA2 data center. “We don’t even get an explanation why they run them. They are supposed to be for an emergency. What is the emergency?”


Personally I reject any excuse corporate America has for doing this to our environment and at this point will never support it and I'll look at supporters as environmental terrorists.
 
Another article about data center local citizens abuse and exploitation:From the Guardian: ‘Hidden datacentre tax’ costing Irish households millions, report says Datacentres used 22% of country’s electricity last year, pushing up household bills, study suggests


‘Hidden datacentre tax’ costing Irish households millions, report says​

Datacentres used 22% of country’s electricity last year, pushing up household bills, study suggests

Rory Carroll Ireland correspondent
Thu 28 May 2026 09.01 EDT
Share


Prefer the Guardian on Google

Energy demand by datacentres in Ireland has added hundreds of euros to household electricity bills in a pattern that could be replicated across Europe, according to a report.
Ireland’s growing number of datacentres last year used 22% of the country’s electricity, more than all urban homes combined, according to the Central Statistics Office. The equivalent figure in the US and UK is 6%.

The centres have “drained” €715m (£620m) from the Irish economy and increased household bills by a cumulative average of €360 between 2015 and 2023, said the report commissioned by Friends of the Earth Ireland and Beyond Fossil Fuels. It argued that Irish households have been subsidising big tech via a “hidden data centre tax” on their electricity bills.

Corporate greed is rampant here as data centers tax local people and government as they terrorize the population and foul their environment.

Once again supporting this is a form of environmental violence and cannot be condoned in anyway.