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Re:AI Needs More Power by bradfa on Tuesday December 09, 2025 @07:23PM (#46212547)
It’s interesting that this implies that building natural gas pipelines to data centers is easy, at least easier than building out substations and transmission lines. Because you don’t run a (or several) 42MW natural gas generator without a big fat natural gas pipe.

Why is it so much easier to build the pipelines than to bring in electric lines?

Re:AI Needs More Power by Retric on Tuesday December 09, 2025 @07:52PM (#46212733)
A thick pipe but not very long pipe. Individual northern city needs peak supply for home heating in the GW rage. Add a few tanks on location and you can tap existing supply at different times than peak winter heating (cold snaps).

Now run your electrical cables from whatever location gives the cheapest access and natural gas becomes a non issue.

Actual process is more complicated, but that’s the basic reason adding natural gas turbines is generally a non issue.

Re:AI Needs More Power by pwarner on Tuesday December 09, 2025 @07:36PM (#46212628)
Transmission loss in gas pipes is probably lower than electric transmission? Underground probably easier than above ground. Lastly I think they are building data centers near natural gas fields...
Re:AI Needs More Power by stephen_g on Tuesday December 09, 2025 @07:45PM (#46212687)
I wouldn't expect so, because it's not just fugitive emissions we're talking about, but that you need to run a lot of big compressors to run pipelines. But often that cost isn't really counted because they just burn more gas to power them.
Re:AI Needs More Power by Cthulhu_ on Wednesday December 10, 2025 @07:50AM (#46217122)
It's amortized for sure, gas is relatively dense in energy and can be transported long distance with minimal loss, unlike electricity. High voltage DC power lines are used in some places for long distance transport, but that's nowhere near the continent-spanning oil and gas pipes.
Re:AI Needs More Power by mNovak on Tuesday December 09, 2025 @07:37PM (#46212632)
I'm guessing it's not just the overhead lines, but you need the actual power plants somewhere.
Re:AI Needs More Power by bob1029 on Tuesday December 09, 2025 @08:35PM (#46213034)
> Why is it so much easier to build the pipelines than to bring in electric lines?

It's not necessarily easier to do one or the other. It's about which one is faster.

Re:AI Needs More Power by cestith on Wednesday December 10, 2025 @09:45AM (#46218258)
In Texas the electric grid is regulated by ERCOT and gas pipelines are regulated (by accident of history) by the Texas Railroad Commission. ERCOT has a big network of producers who put energy into the grid, local companies like CenterPoint Energy who distribute it to customer sites, then retail electric companies sell the power and pay a line usage fee to the line owner (which tends to be a fixed monthly cost to the customer, listed separately on the bill from other fees or usage bills). The TRC deals with companies that own their own pipelines and bill the end customer directly.

A lot of the natural gas in the US is in Texas, and a lot of it is flared while pumping out crude. Putting data centers on turbines near the extraction fields out in the Permian Basin makes sense for power. You can build short pipelines or hook into the ones already there.

Re:AI Needs More Power by johnsmith1840 on Tuesday December 09, 2025 @08:43PM (#46213087)
They want to build them near the oil fields in texas. As of now most of those fields already run without much if any power infra in place on top of that they would be right by the natural gas generation.

Add that the manpower and expertise of running generators is abundant there and it's a prettt solid idea if they can actually make it.

Re:AI Needs More Power by seanmcdirmid on Tuesday December 09, 2025 @08:52PM (#46213137)
WA state has the advantage of cheap electricity due to hydro projects, and before they were able to ship off their surplus to CA, they did a lot of aluminum production here to take advantage of it. I can see natural gas working similar, but I’ve also heard data centers want to take advantage of cheap hydro and wind power in western states.
Re:AI Needs More Power by trhway on Tuesday December 09, 2025 @09:09PM (#46213223)
>Because you don’t run a (or several) 42MW natural gas generator without a big fat natural gas pipe.

at 40KWh/kg and 50% efficiency you'd need 2 tons/hour for a 42MW generator, which is a one large tanker per day. Thus you can do without gas pipeline which is a big advantage over electric wires and other static infra when you need to scale power quickly.

Sidenote - it all brings memories of how 34 years ago i worked couple months in a Siberia village powered by working 24x7 gas turbine from a helicopter.

Vs. the original article - i doubt that supersonic core is the best. Supersonic engine is designed to get a significant pressure from ram effect. Until supersonic speed reached, such an engine has bad efficiency due to low compression - that is why Concorde was accelerating to supersonic speed on afterburners (atrocious efficiency just to get to efficient speed as fast as possible). The modern engines from say 787 - they have high compression and best high temp mono-crystal blades, etc. - would be much better.

Re:AI Needs More Power by bradfa on Wednesday December 10, 2025 @05:25AM (#46216147)
So AI comes on a truck, not through a series of tubes. Got it! :)
Re:AI Needs More Power by trhway on Wednesday December 10, 2025 @06:28AM (#46216554)
Ultimately AI comes from space :) Just wait until Starship starts flying - with its projected $/kg launch costs the placement of solar + GPUs in space would be the cheapest option (10-20kg is 1 GPU, 5 m2 solar and 2 m2 radiator (at 70C radiating away 1.5 KW) - total launch cost would be around paltry $1-2K) .
Re:AI Needs More Power by dismalpedigree on Wednesday December 10, 2025 @07:32AM (#46216996)
Are people seriously still on this “datacenter in space” thing? It has been beaten down with hard facts endlessly the past few months.
Re:AI Needs More Power by broretore on Wednesday December 10, 2025 @11:25AM (#46219714)
Facts don't matter when Elon's feelings are at stake
Re:AI Needs More Power by trhway on Wednesday December 10, 2025 @03:20PM (#46223172)
you see my numbers in my comment. I don't see any numbers in your comment (please don't give any links to the articles whose authors don't understand black body radiation formula and thus reference ISS cooling in datacenter discussion :)
Re:AI Needs More Power by t_tsonev on Wednesday December 10, 2025 @11:42AM (#46219952)
I'd really like to see the math on this one. It implies that building wind and solar on Earth is somehow worse than building it in space _and_ moving the data center there? It's not just counter-intuitive, it's bonkers.
Re:AI Needs More Power by trhway on Wednesday December 10, 2025 @03:15PM (#46223114)
>It's not just counter-intuitive, it's bonkers.

you need to look at numbers instead of intuition - intuition naturally gets us wrong when we deal with unfamiliar things like space.

A ready 10 ton house will cost $500K-1M to place in a well developed area - the cost of land itself, communications, permits, also delays and unpredictability of process, etc. Add to that yearly taxes. Add tremendous electricity costs in case of the datacenter. And all those costs have and will be growing.

Launching 10 tons on Starship - sub-$1M and that cost will drop down to about $100K-200K.

> It implies that building wind and solar on Earth is somehow worse than building it in space _and_ moving the data center there?

exactly. Space is cheap and plentiful :)

Re:AI Needs More Power by fpoling on Tuesday December 09, 2025 @10:37PM (#46213748)
In Texas a lot of natural gas is wasted/burned away as it is not profitable to collect and transport it from all oil fields. These days quite a few places put small turbines to generate electricity to do cryptocurrency mining.

This will serve a similar use case just on a bigger scale.

Re:AI Needs More Power by unwind on Wednesday December 10, 2025 @04:01AM (#46215607)
That is the most William Gibson thing I've read today, at least. Wow.
Re:AI Needs More Power by actionfromafar on Wednesday December 10, 2025 @06:33AM (#46216581)
I have also heard about deployment of inference (LLMs etc) instead of crypto at these gas turbines. If you already have internet there, why not I guess.
Re:AI Needs More Power by joshfraser on Wednesday December 10, 2025 @07:40AM (#46217050)
We have an abundance of natural gas and a shortage of electricity.
Re:AI Needs More Power by auspiv on Wednesday December 10, 2025 @09:39AM (#46218206)
a 16" natural gas pipeline moving 200 MMscf/d at pressures >1000 psi (relatively standard numbers, 16" can go up to ~600 MMscf/d) has a power transport capability of 2.5 GW (thermal). burn that in 60% efficient combined cycle turbines and you get 1 GW of electricity. that's a lot easier than building 1 GW of electric transmission lines.
Re:AI Needs More Power by gehsty on Wednesday December 10, 2025 @11:46AM (#46220009)
You can do 1GW with a single 525kV hvdc bundle (maybe 300mm across).

The market seems to be settling on a 5 cable setup and 2GW power transmission (Tenet & other European TSOs have a 2GW Platform build out…).

Re:AI Needs More Power by quickthrowman on Wednesday December 10, 2025 @05:58PM (#46225195)
1GW at 500kV three-phase AC is 1154 amps; 1 billion divided by 500,000 divided by sqrt(3).

You could handle that with one set of 1272kcmil aluminum conductors, or two sets of 300kcmil conductors, based off of this wire submittal: https://www.prioritywire.com/specs/acsr.pdf

The voltage drop will be higher than HVDC, but AC transformers are probably an order of magnitude cheaper than HVDC switchgear. That’s the main issue with HVDC, interrupting HVDC current is very difficult since there’s no zero point like with an AC sine wave. High voltage AC breakers use SF-6 to extinguish the arc at the zero point, which happens 120 times per second at 60 hz (100 times per second for 50 hz)