There's a lot of stuff going around about datacenters, so I decided to do a quick tour yesterday of some of the datacenters in the Salt Lake Valley.
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Here's what I hope your takeaway from this thread will be: datacenters come in many sizes, have many uses, and are not necessarily where you'd expect. The impact they have locally depends on how they're powered, how they're cooled, what they're used for, who owns them, and how big they are. It's worth looking at all of these things when considering whether a datacenter project is a good idea or not.
I was on the local news about this, lol my office is such a mess
Closed-loop cooling systems save water, but can be a drain on electricity - KSLTV.com
While closed-loop cooling systems, like the one being touted for a large data center in Box Elder County can save lots of water, they often use more electricity in return, which can impact the environment in other ways, according to Dr. Ricci, a professor in the University of Utah's school of computing.
KSLTV.com (ksltv.com)
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The reason I went on this little tour was to put in perspective the proposed Stratos datacenter project in Box Elder County, UT.
Stratos is supposedly designed to eventually reach a size of 9 GW. That is more than double the 4 GW that the entire state of Utah currently uses. The entire campus is supposed to be big enough that, for comparison, it would fill over 10% of the Salt Lake Valley, as shown in this image (which I didn't make).
That last datacenter campus? At ~160 MW, those three buildings put together are designed for a load about 1/55th the size of Stratos. That 300 MW natural gas power station we saw in the background? Stratos is supposed to generate its own power on-site, so it will need 30 of those things. (Or maybe more - remember PUE?)
In terms of carbon output, this thing is designed to be an absolute monster.
There's not much getting around that. They have handwaved about including solar and/or wind, but without anything concrete, we should assume this is a whole lot of carbon.
How about water?
Well, that's harder to tell, given all the vagaries and "if"s in the public information so far.
Remember, a datacenter has to get rid of a lot of heat. A datacenter that is generating its own energy on-site has to get rid of *far* more heat.
In the desert West, the most *energy* efficient way of getting rid of heat in the hot summer months is evaporative cooling: you boil water. This has, historically, been a major way of cooling both natural gas plants and datacenters, as well as homes, etc.
The same reason why this works well in the west is the same reason why it's problematic: we have very dry air, so evaporative cooling is very effective, but having dry air is connected to the fact that we don't have much water to begin with.
There *are* ways to air-cool natural gas turbines, and there *are* ways to cool datacenters that are not evaporative cooling. They are more *water* efficient. But they are less *power* efficient, which means, in this context, burning even more natural gas.
The backers of Stratos claim that they are trying to get some very new, high-tech gas turbines that operate without water cooling, or at least with very little. That does assuage some water concerns. But their language is very hedge-y - they're trying, they hope to jump in line for the limited supply of them, etc.
They also claim they will use "closed loop" water systems for cooling the datacenter. There are several things this *could* mean, and we need to know more in order to actually understand it. Most cooling systems for datacenters and even large buildings have a closed loop of water (or another coolant) for moving heat around. That's because we cannot *make* cold, we can only *move* heat. In some datacenters, this cold loop comes into the room, where it's used to cool air, which is blown across the servers. In higher-power-density datacenters, the coolant loop comes all the way to the individual rack in order to cool the air right before it enters the servers. In the most high-tech datacenters (which Stratos would likely be), it comes all the way *inside* the server, directly exchanging heat with the hot bits like CPUs and GPUs.
Coolant in these kinds of systems circulates, it's closed, you can generally consider the coolant loop to consume very little to no water after it's been filled.
But: you still have to make the heat go away somehow. This is where Stratos *might* use evaporative cooling. Or they might opt for one of the more expensive, less energy efficient dry systems. Saying "we have a closed loop" only tells us *part* of the story!
Here's what we know: the Stratos people have secured 13,000 acre-feet of water rights. In numbers that mean more to most of us, that's about 4 billion gallons per year.
They *claim* that's far more water than they need, and they won't use most of it.
But: if they don't manage to get their air-cooled gas turbines (which, in addition to being less efficient, also cost more), or decide to go with some evaporative cooling for the datacenter (because it's cheaper and uses less power), they could very easily use that much water. We are very much in a "trust me" situation, and it's not clear that we *should* trust what developers say when they are trying to get permits. We need to get independent studies and binding contracts.
For those who aren't locals, you might not be aware, but: the Great Salt Lake is shrinking. People are trying (not hard enough, probably) to save it. Not just because hey, what would we call our city without it, but also because the lakebed is full of chemicals we'd rather not be breathing in, thanks.
Stratos would not literally pull water out of the lake (which it is quite close to). But: the water rights they have obtained are in the watershed of the lake. So: if they use the water rights they have obtained, they might well contribute to the drying up of the lake.
The point here is that: they are hoarding water rights that they claim they will not use - the more reasonable bet is to assume they will use them; we need a study by actual hydrologists to understand whether using the water would accelerate the lake's demise.
And, you will notice that I have not even touched on a ton of *other* issues, such as:
1) Is there actually demand for all of these computers?
2) Would it be a good idea to fill this demand even if it does exist?
3) Can we build enough computers to fill this thing in a reasonable time anyway?
4) How far will this project get before the AI bubble pops, and will it leave anyone other than the investors holding the bag?
5) If it does get fully built, what other resources (like more water rights) might they go after?
6) Is it a wise idea to provide huge tax breaks to companies that expect to be highly profitable?
7) This is being done though the Military Installation Development Authority - what's the actual military connection here?
Regardless of whether it's wet or dry, is dumping this much heat into one valley a good idea?
9) There's no way that burning that much natural gas doesn't raise gas and electricity prices.
10) Can we trust the developers' numbers for how many jobs this will create locally?Just to name a few.
@ricci that is absurd.
I've used a a couple and toured a couple more of the US's largest supercomputer facilities, each of which manages to live in a single normal-sized building. These things run simulations of the universe. My stuff could take hours, maybe a day to run, but I know other stuff running there took weeks or months, on thousands of nodes. The facility I've worked with the most, NERSC, serves about 11k users for scientific research.
I struggle to imagine what you could possibly do with the scale of compute proposed at Stratos, even if it served the entire population of the US.
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I was on the local news about this, lol my office is such a mess
Closed-loop cooling systems save water, but can be a drain on electricity - KSLTV.com
While closed-loop cooling systems, like the one being touted for a large data center in Box Elder County can save lots of water, they often use more electricity in return, which can impact the environment in other ways, according to Dr. Ricci, a professor in the University of Utah's school of computing.
KSLTV.com (ksltv.com)
@ricci
Interesting! So do you use distilled water for the closed loop? -
@ricci that is absurd.
I've used a a couple and toured a couple more of the US's largest supercomputer facilities, each of which manages to live in a single normal-sized building. These things run simulations of the universe. My stuff could take hours, maybe a day to run, but I know other stuff running there took weeks or months, on thousands of nodes. The facility I've worked with the most, NERSC, serves about 11k users for scientific research.
I struggle to imagine what you could possibly do with the scale of compute proposed at Stratos, even if it served the entire population of the US.
@iris a whole lot of surveillance capitalism, I guess
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@ricci
Interesting! So do you use distilled water for the closed loop?I don't know the exact level of purity they go for, but yeah, removing things that could leave mineral deposits or cause corrosion is important
It is often mixed with glycol to lower the freezing point (no idea what Stratos would do, they have given us nowhere near that level of detail)
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I don't know the exact level of purity they go for, but yeah, removing things that could leave mineral deposits or cause corrosion is important
It is often mixed with glycol to lower the freezing point (no idea what Stratos would do, they have given us nowhere near that level of detail)
@ricci
I use a CPAP and was thinking of the kind of water I need in that. Adding something to lower the freeze point is also interesting. -
I was on the local news about this, lol my office is such a mess
Closed-loop cooling systems save water, but can be a drain on electricity - KSLTV.com
While closed-loop cooling systems, like the one being touted for a large data center in Box Elder County can save lots of water, they often use more electricity in return, which can impact the environment in other ways, according to Dr. Ricci, a professor in the University of Utah's school of computing.
KSLTV.com (ksltv.com)
@ricci I am reminded of a story that I think Kurt Vonnegut told about his brother. Someone commented that the brother’s desk was a mess. He gestured to his head and said ‘If you think this desk is a mess, you should see what it’s like in here’.
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@ricci I am reminded of a story that I think Kurt Vonnegut told about his brother. Someone commented that the brother’s desk was a mess. He gestured to his head and said ‘If you think this desk is a mess, you should see what it’s like in here’.
@richardinsandy my collection of spherical objects is clearly visible, dunno what that says about what's in my head
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The reason I went on this little tour was to put in perspective the proposed Stratos datacenter project in Box Elder County, UT.
Stratos is supposedly designed to eventually reach a size of 9 GW. That is more than double the 4 GW that the entire state of Utah currently uses. The entire campus is supposed to be big enough that, for comparison, it would fill over 10% of the Salt Lake Valley, as shown in this image (which I didn't make).
That last datacenter campus? At ~160 MW, those three buildings put together are designed for a load about 1/55th the size of Stratos. That 300 MW natural gas power station we saw in the background? Stratos is supposed to generate its own power on-site, so it will need 30 of those things. (Or maybe more - remember PUE?)
In terms of carbon output, this thing is designed to be an absolute monster.
There's not much getting around that. They have handwaved about including solar and/or wind, but without anything concrete, we should assume this is a whole lot of carbon.
How about water?
Well, that's harder to tell, given all the vagaries and "if"s in the public information so far.
Remember, a datacenter has to get rid of a lot of heat. A datacenter that is generating its own energy on-site has to get rid of *far* more heat.
In the desert West, the most *energy* efficient way of getting rid of heat in the hot summer months is evaporative cooling: you boil water. This has, historically, been a major way of cooling both natural gas plants and datacenters, as well as homes, etc.
The same reason why this works well in the west is the same reason why it's problematic: we have very dry air, so evaporative cooling is very effective, but having dry air is connected to the fact that we don't have much water to begin with.
There *are* ways to air-cool natural gas turbines, and there *are* ways to cool datacenters that are not evaporative cooling. They are more *water* efficient. But they are less *power* efficient, which means, in this context, burning even more natural gas.
The backers of Stratos claim that they are trying to get some very new, high-tech gas turbines that operate without water cooling, or at least with very little. That does assuage some water concerns. But their language is very hedge-y - they're trying, they hope to jump in line for the limited supply of them, etc.
They also claim they will use "closed loop" water systems for cooling the datacenter. There are several things this *could* mean, and we need to know more in order to actually understand it. Most cooling systems for datacenters and even large buildings have a closed loop of water (or another coolant) for moving heat around. That's because we cannot *make* cold, we can only *move* heat. In some datacenters, this cold loop comes into the room, where it's used to cool air, which is blown across the servers. In higher-power-density datacenters, the coolant loop comes all the way to the individual rack in order to cool the air right before it enters the servers. In the most high-tech datacenters (which Stratos would likely be), it comes all the way *inside* the server, directly exchanging heat with the hot bits like CPUs and GPUs.
Coolant in these kinds of systems circulates, it's closed, you can generally consider the coolant loop to consume very little to no water after it's been filled.
But: you still have to make the heat go away somehow. This is where Stratos *might* use evaporative cooling. Or they might opt for one of the more expensive, less energy efficient dry systems. Saying "we have a closed loop" only tells us *part* of the story!
Here's what we know: the Stratos people have secured 13,000 acre-feet of water rights. In numbers that mean more to most of us, that's about 4 billion gallons per year.
They *claim* that's far more water than they need, and they won't use most of it.
But: if they don't manage to get their air-cooled gas turbines (which, in addition to being less efficient, also cost more), or decide to go with some evaporative cooling for the datacenter (because it's cheaper and uses less power), they could very easily use that much water. We are very much in a "trust me" situation, and it's not clear that we *should* trust what developers say when they are trying to get permits. We need to get independent studies and binding contracts.
For those who aren't locals, you might not be aware, but: the Great Salt Lake is shrinking. People are trying (not hard enough, probably) to save it. Not just because hey, what would we call our city without it, but also because the lakebed is full of chemicals we'd rather not be breathing in, thanks.
Stratos would not literally pull water out of the lake (which it is quite close to). But: the water rights they have obtained are in the watershed of the lake. So: if they use the water rights they have obtained, they might well contribute to the drying up of the lake.
The point here is that: they are hoarding water rights that they claim they will not use - the more reasonable bet is to assume they will use them; we need a study by actual hydrologists to understand whether using the water would accelerate the lake's demise.
And, you will notice that I have not even touched on a ton of *other* issues, such as:
1) Is there actually demand for all of these computers?
2) Would it be a good idea to fill this demand even if it does exist?
3) Can we build enough computers to fill this thing in a reasonable time anyway?
4) How far will this project get before the AI bubble pops, and will it leave anyone other than the investors holding the bag?
5) If it does get fully built, what other resources (like more water rights) might they go after?
6) Is it a wise idea to provide huge tax breaks to companies that expect to be highly profitable?
7) This is being done though the Military Installation Development Authority - what's the actual military connection here? Regardless of whether it's wet or dry, is dumping this much heat into one valley a good idea?
9) There's no way that burning that much natural gas doesn't raise gas and electricity prices.
10) Can we trust the developers' numbers for how many jobs this will create locally?Just to name a few.
@ricci well all those numbers seem fucking crazy nuts.
-
The reason I went on this little tour was to put in perspective the proposed Stratos datacenter project in Box Elder County, UT.
Stratos is supposedly designed to eventually reach a size of 9 GW. That is more than double the 4 GW that the entire state of Utah currently uses. The entire campus is supposed to be big enough that, for comparison, it would fill over 10% of the Salt Lake Valley, as shown in this image (which I didn't make).
That last datacenter campus? At ~160 MW, those three buildings put together are designed for a load about 1/55th the size of Stratos. That 300 MW natural gas power station we saw in the background? Stratos is supposed to generate its own power on-site, so it will need 30 of those things. (Or maybe more - remember PUE?)
In terms of carbon output, this thing is designed to be an absolute monster.
There's not much getting around that. They have handwaved about including solar and/or wind, but without anything concrete, we should assume this is a whole lot of carbon.
How about water?
Well, that's harder to tell, given all the vagaries and "if"s in the public information so far.
Remember, a datacenter has to get rid of a lot of heat. A datacenter that is generating its own energy on-site has to get rid of *far* more heat.
In the desert West, the most *energy* efficient way of getting rid of heat in the hot summer months is evaporative cooling: you boil water. This has, historically, been a major way of cooling both natural gas plants and datacenters, as well as homes, etc.
The same reason why this works well in the west is the same reason why it's problematic: we have very dry air, so evaporative cooling is very effective, but having dry air is connected to the fact that we don't have much water to begin with.
There *are* ways to air-cool natural gas turbines, and there *are* ways to cool datacenters that are not evaporative cooling. They are more *water* efficient. But they are less *power* efficient, which means, in this context, burning even more natural gas.
The backers of Stratos claim that they are trying to get some very new, high-tech gas turbines that operate without water cooling, or at least with very little. That does assuage some water concerns. But their language is very hedge-y - they're trying, they hope to jump in line for the limited supply of them, etc.
They also claim they will use "closed loop" water systems for cooling the datacenter. There are several things this *could* mean, and we need to know more in order to actually understand it. Most cooling systems for datacenters and even large buildings have a closed loop of water (or another coolant) for moving heat around. That's because we cannot *make* cold, we can only *move* heat. In some datacenters, this cold loop comes into the room, where it's used to cool air, which is blown across the servers. In higher-power-density datacenters, the coolant loop comes all the way to the individual rack in order to cool the air right before it enters the servers. In the most high-tech datacenters (which Stratos would likely be), it comes all the way *inside* the server, directly exchanging heat with the hot bits like CPUs and GPUs.
Coolant in these kinds of systems circulates, it's closed, you can generally consider the coolant loop to consume very little to no water after it's been filled.
But: you still have to make the heat go away somehow. This is where Stratos *might* use evaporative cooling. Or they might opt for one of the more expensive, less energy efficient dry systems. Saying "we have a closed loop" only tells us *part* of the story!
Here's what we know: the Stratos people have secured 13,000 acre-feet of water rights. In numbers that mean more to most of us, that's about 4 billion gallons per year.
They *claim* that's far more water than they need, and they won't use most of it.
But: if they don't manage to get their air-cooled gas turbines (which, in addition to being less efficient, also cost more), or decide to go with some evaporative cooling for the datacenter (because it's cheaper and uses less power), they could very easily use that much water. We are very much in a "trust me" situation, and it's not clear that we *should* trust what developers say when they are trying to get permits. We need to get independent studies and binding contracts.
For those who aren't locals, you might not be aware, but: the Great Salt Lake is shrinking. People are trying (not hard enough, probably) to save it. Not just because hey, what would we call our city without it, but also because the lakebed is full of chemicals we'd rather not be breathing in, thanks.
Stratos would not literally pull water out of the lake (which it is quite close to). But: the water rights they have obtained are in the watershed of the lake. So: if they use the water rights they have obtained, they might well contribute to the drying up of the lake.
The point here is that: they are hoarding water rights that they claim they will not use - the more reasonable bet is to assume they will use them; we need a study by actual hydrologists to understand whether using the water would accelerate the lake's demise.
And, you will notice that I have not even touched on a ton of *other* issues, such as:
1) Is there actually demand for all of these computers?
2) Would it be a good idea to fill this demand even if it does exist?
3) Can we build enough computers to fill this thing in a reasonable time anyway?
4) How far will this project get before the AI bubble pops, and will it leave anyone other than the investors holding the bag?
5) If it does get fully built, what other resources (like more water rights) might they go after?
6) Is it a wise idea to provide huge tax breaks to companies that expect to be highly profitable?
7) This is being done though the Military Installation Development Authority - what's the actual military connection here? Regardless of whether it's wet or dry, is dumping this much heat into one valley a good idea?
9) There's no way that burning that much natural gas doesn't raise gas and electricity prices.
10) Can we trust the developers' numbers for how many jobs this will create locally?Just to name a few.
@ricci Earnest question, Rob: if this were built over alfalfa fields, which would most likely use more water?
-
The reason I went on this little tour was to put in perspective the proposed Stratos datacenter project in Box Elder County, UT.
Stratos is supposedly designed to eventually reach a size of 9 GW. That is more than double the 4 GW that the entire state of Utah currently uses. The entire campus is supposed to be big enough that, for comparison, it would fill over 10% of the Salt Lake Valley, as shown in this image (which I didn't make).
That last datacenter campus? At ~160 MW, those three buildings put together are designed for a load about 1/55th the size of Stratos. That 300 MW natural gas power station we saw in the background? Stratos is supposed to generate its own power on-site, so it will need 30 of those things. (Or maybe more - remember PUE?)
In terms of carbon output, this thing is designed to be an absolute monster.
There's not much getting around that. They have handwaved about including solar and/or wind, but without anything concrete, we should assume this is a whole lot of carbon.
How about water?
Well, that's harder to tell, given all the vagaries and "if"s in the public information so far.
Remember, a datacenter has to get rid of a lot of heat. A datacenter that is generating its own energy on-site has to get rid of *far* more heat.
In the desert West, the most *energy* efficient way of getting rid of heat in the hot summer months is evaporative cooling: you boil water. This has, historically, been a major way of cooling both natural gas plants and datacenters, as well as homes, etc.
The same reason why this works well in the west is the same reason why it's problematic: we have very dry air, so evaporative cooling is very effective, but having dry air is connected to the fact that we don't have much water to begin with.
There *are* ways to air-cool natural gas turbines, and there *are* ways to cool datacenters that are not evaporative cooling. They are more *water* efficient. But they are less *power* efficient, which means, in this context, burning even more natural gas.
The backers of Stratos claim that they are trying to get some very new, high-tech gas turbines that operate without water cooling, or at least with very little. That does assuage some water concerns. But their language is very hedge-y - they're trying, they hope to jump in line for the limited supply of them, etc.
They also claim they will use "closed loop" water systems for cooling the datacenter. There are several things this *could* mean, and we need to know more in order to actually understand it. Most cooling systems for datacenters and even large buildings have a closed loop of water (or another coolant) for moving heat around. That's because we cannot *make* cold, we can only *move* heat. In some datacenters, this cold loop comes into the room, where it's used to cool air, which is blown across the servers. In higher-power-density datacenters, the coolant loop comes all the way to the individual rack in order to cool the air right before it enters the servers. In the most high-tech datacenters (which Stratos would likely be), it comes all the way *inside* the server, directly exchanging heat with the hot bits like CPUs and GPUs.
Coolant in these kinds of systems circulates, it's closed, you can generally consider the coolant loop to consume very little to no water after it's been filled.
But: you still have to make the heat go away somehow. This is where Stratos *might* use evaporative cooling. Or they might opt for one of the more expensive, less energy efficient dry systems. Saying "we have a closed loop" only tells us *part* of the story!
Here's what we know: the Stratos people have secured 13,000 acre-feet of water rights. In numbers that mean more to most of us, that's about 4 billion gallons per year.
They *claim* that's far more water than they need, and they won't use most of it.
But: if they don't manage to get their air-cooled gas turbines (which, in addition to being less efficient, also cost more), or decide to go with some evaporative cooling for the datacenter (because it's cheaper and uses less power), they could very easily use that much water. We are very much in a "trust me" situation, and it's not clear that we *should* trust what developers say when they are trying to get permits. We need to get independent studies and binding contracts.
For those who aren't locals, you might not be aware, but: the Great Salt Lake is shrinking. People are trying (not hard enough, probably) to save it. Not just because hey, what would we call our city without it, but also because the lakebed is full of chemicals we'd rather not be breathing in, thanks.
Stratos would not literally pull water out of the lake (which it is quite close to). But: the water rights they have obtained are in the watershed of the lake. So: if they use the water rights they have obtained, they might well contribute to the drying up of the lake.
The point here is that: they are hoarding water rights that they claim they will not use - the more reasonable bet is to assume they will use them; we need a study by actual hydrologists to understand whether using the water would accelerate the lake's demise.
And, you will notice that I have not even touched on a ton of *other* issues, such as:
1) Is there actually demand for all of these computers?
2) Would it be a good idea to fill this demand even if it does exist?
3) Can we build enough computers to fill this thing in a reasonable time anyway?
4) How far will this project get before the AI bubble pops, and will it leave anyone other than the investors holding the bag?
5) If it does get fully built, what other resources (like more water rights) might they go after?
6) Is it a wise idea to provide huge tax breaks to companies that expect to be highly profitable?
7) This is being done though the Military Installation Development Authority - what's the actual military connection here? Regardless of whether it's wet or dry, is dumping this much heat into one valley a good idea?
9) There's no way that burning that much natural gas doesn't raise gas and electricity prices.
10) Can we trust the developers' numbers for how many jobs this will create locally?Just to name a few.
@ricci
Considering that gas turbines are around 40% efficient, that means actually 22.5GW of heat will be dumped into the environment. -
The reason I went on this little tour was to put in perspective the proposed Stratos datacenter project in Box Elder County, UT.
Stratos is supposedly designed to eventually reach a size of 9 GW. That is more than double the 4 GW that the entire state of Utah currently uses. The entire campus is supposed to be big enough that, for comparison, it would fill over 10% of the Salt Lake Valley, as shown in this image (which I didn't make).
That last datacenter campus? At ~160 MW, those three buildings put together are designed for a load about 1/55th the size of Stratos. That 300 MW natural gas power station we saw in the background? Stratos is supposed to generate its own power on-site, so it will need 30 of those things. (Or maybe more - remember PUE?)
In terms of carbon output, this thing is designed to be an absolute monster.
There's not much getting around that. They have handwaved about including solar and/or wind, but without anything concrete, we should assume this is a whole lot of carbon.
How about water?
Well, that's harder to tell, given all the vagaries and "if"s in the public information so far.
Remember, a datacenter has to get rid of a lot of heat. A datacenter that is generating its own energy on-site has to get rid of *far* more heat.
In the desert West, the most *energy* efficient way of getting rid of heat in the hot summer months is evaporative cooling: you boil water. This has, historically, been a major way of cooling both natural gas plants and datacenters, as well as homes, etc.
The same reason why this works well in the west is the same reason why it's problematic: we have very dry air, so evaporative cooling is very effective, but having dry air is connected to the fact that we don't have much water to begin with.
There *are* ways to air-cool natural gas turbines, and there *are* ways to cool datacenters that are not evaporative cooling. They are more *water* efficient. But they are less *power* efficient, which means, in this context, burning even more natural gas.
The backers of Stratos claim that they are trying to get some very new, high-tech gas turbines that operate without water cooling, or at least with very little. That does assuage some water concerns. But their language is very hedge-y - they're trying, they hope to jump in line for the limited supply of them, etc.
They also claim they will use "closed loop" water systems for cooling the datacenter. There are several things this *could* mean, and we need to know more in order to actually understand it. Most cooling systems for datacenters and even large buildings have a closed loop of water (or another coolant) for moving heat around. That's because we cannot *make* cold, we can only *move* heat. In some datacenters, this cold loop comes into the room, where it's used to cool air, which is blown across the servers. In higher-power-density datacenters, the coolant loop comes all the way to the individual rack in order to cool the air right before it enters the servers. In the most high-tech datacenters (which Stratos would likely be), it comes all the way *inside* the server, directly exchanging heat with the hot bits like CPUs and GPUs.
Coolant in these kinds of systems circulates, it's closed, you can generally consider the coolant loop to consume very little to no water after it's been filled.
But: you still have to make the heat go away somehow. This is where Stratos *might* use evaporative cooling. Or they might opt for one of the more expensive, less energy efficient dry systems. Saying "we have a closed loop" only tells us *part* of the story!
Here's what we know: the Stratos people have secured 13,000 acre-feet of water rights. In numbers that mean more to most of us, that's about 4 billion gallons per year.
They *claim* that's far more water than they need, and they won't use most of it.
But: if they don't manage to get their air-cooled gas turbines (which, in addition to being less efficient, also cost more), or decide to go with some evaporative cooling for the datacenter (because it's cheaper and uses less power), they could very easily use that much water. We are very much in a "trust me" situation, and it's not clear that we *should* trust what developers say when they are trying to get permits. We need to get independent studies and binding contracts.
For those who aren't locals, you might not be aware, but: the Great Salt Lake is shrinking. People are trying (not hard enough, probably) to save it. Not just because hey, what would we call our city without it, but also because the lakebed is full of chemicals we'd rather not be breathing in, thanks.
Stratos would not literally pull water out of the lake (which it is quite close to). But: the water rights they have obtained are in the watershed of the lake. So: if they use the water rights they have obtained, they might well contribute to the drying up of the lake.
The point here is that: they are hoarding water rights that they claim they will not use - the more reasonable bet is to assume they will use them; we need a study by actual hydrologists to understand whether using the water would accelerate the lake's demise.
And, you will notice that I have not even touched on a ton of *other* issues, such as:
1) Is there actually demand for all of these computers?
2) Would it be a good idea to fill this demand even if it does exist?
3) Can we build enough computers to fill this thing in a reasonable time anyway?
4) How far will this project get before the AI bubble pops, and will it leave anyone other than the investors holding the bag?
5) If it does get fully built, what other resources (like more water rights) might they go after?
6) Is it a wise idea to provide huge tax breaks to companies that expect to be highly profitable?
7) This is being done though the Military Installation Development Authority - what's the actual military connection here? Regardless of whether it's wet or dry, is dumping this much heat into one valley a good idea?
9) There's no way that burning that much natural gas doesn't raise gas and electricity prices.
10) Can we trust the developers' numbers for how many jobs this will create locally?Just to name a few.
@ricci just what they need /s
A drying Great Salt Lake is spewing toxic dust. It could cost Utah billions.
A new report from two environmental groups says elected officials and scientists aren't taking the problem seriously enough.
Grist (grist.org)
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I was on the local news about this, lol my office is such a mess
Closed-loop cooling systems save water, but can be a drain on electricity - KSLTV.com
While closed-loop cooling systems, like the one being touted for a large data center in Box Elder County can save lots of water, they often use more electricity in return, which can impact the environment in other ways, according to Dr. Ricci, a professor in the University of Utah's school of computing.
KSLTV.com (ksltv.com)
@ricci …something about a clean desk being the sign of an empty mind…
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Why are we building housing for computers and not for people?
Venture capitalists and pension funds think it’s more profitable to do the former than the latter.
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@ricci
Currently this area is remote ranching country, served by one two-lane road and no businesses like gas stations or stores. In addition to building the data center, they will have to build ALL the infrastructure needed to support it. Where are the workers going to live? -
@ricci interesting to me that the (presumably) higher-density facility is taller (multi-story). I've noticed that with other new-built high-density facilities.
to save ground space? maybe there is water cooling involved and it is helpful to have that equipment above/below servers? or high ceilings help with thermal engineering?
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@jonhendry @Dougfir The developer claims 2,000 workers on site after construction, a number that seems overly optimistic
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@ricci …something about a clean desk being the sign of an empty mind…
@wiersdorf This is a good question, so I looked up some numbers.
Two different sources get me something like 3 acre-feet of water per acre for alfalfa in that area: a 1994 report from Utah State: https://waterrights.utah.gov/docSys/v912/a912/a912044e.pdf (see SNWV in Figure 2), and a listing of a huge farm for sale in the Snowville area now: https://www.land.com/property/6034-acres-in-box-elder-county-utah/4545825/ - claims 3895 acres under irrigation using 11.7k acre-feet of water rights.
So that would mean that the Stratus project has secured enough water rights to farm about 4.3k acres of alfalfa (which is about 10% of the land they say they have access to).
So: this is not nearly enough water to farm all of that area with alfalfa (is all of it even suitable for this purpose? no idea), but enough for a big chunk of it.
Of course, Utah is already watering vastly more alfalfa than we can afford to with our limited water resources.
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@jonhendry @Dougfir The developer claims 2,000 workers on site after construction, a number that seems overly optimistic
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I was on the local news about this, lol my office is such a mess
Closed-loop cooling systems save water, but can be a drain on electricity - KSLTV.com
While closed-loop cooling systems, like the one being touted for a large data center in Box Elder County can save lots of water, they often use more electricity in return, which can impact the environment in other ways, according to Dr. Ricci, a professor in the University of Utah's school of computing.
KSLTV.com (ksltv.com)
@ricci wait, most if not all DCs use open loop cooling systems?
