Kyri Baker
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kyrib.bsky.social
Kyri Baker
@kyrib.bsky.social
engineering professor @ University of Colorado

power systems optimization AND power lifting

"energy as a personality" -my wife

<3 cats, playing guitar/bass/drums, rock/metal, fitness, video games, taking stuff apart. Views =my own and not my employer's
Makes sense!
December 12, 2024 at 2:31 AM
That almost answers it. If most of the vars are accounted for locally, then it’s justified to have them rated in Watts
December 11, 2024 at 11:17 PM
I think so, but it’s still not 1.0 pf, right?
December 11, 2024 at 11:15 PM
Definitely, but how much? Just a ton of cap banks to cancel out hundreds of VAR from the motors?
December 11, 2024 at 6:23 PM
As a ballpark, if you have a 1 GW data center (with the rating actually in Watts), where 40% of that is the cooling system, and 80% of the cooling system's energy consumption is AC motor loads, assuming an 80% power factor, that's 100's of MVar unaccounted for, making the effective rating ~1.3 GVA
December 11, 2024 at 5:18 PM
2) Is it just that there's a lot of reactive power compensation so these motors do not pull VAR from the grid and their effective grid impact can just be expressed in watts?

3) If they are pulling VAr, what's the impact on harmonics with this level of reactive power loads? @xiaowang1984.bsky.social
December 11, 2024 at 5:18 PM
1) Are the load growth numbers we see for data centers *actually* in MW or is this really MVA? If it's actually MW, the consumption is much higher than we thought (/wire sizing/transformer sizing / etc is much higher)
December 11, 2024 at 5:18 PM
love it

she'll learn to count to 4 too!

www.youtube.com/watch?v=u8cc...
I Can Only Count to FOUR - Psychostick Numbers Bodies Drowning Pool Parody
YouTube video by Psychostick
www.youtube.com
December 11, 2024 at 4:46 PM
YES! 😍
December 11, 2024 at 4:43 PM
Once I did just start explaining OPF because I heard it’s good to keep talking to them and I ran out of things to say 😂
December 11, 2024 at 4:25 PM
One of her swings has some classical music which is probably good because otherwise she’s just listening to pop and metal from me
December 11, 2024 at 4:24 PM
Well also the compressor motors. Cooling systems have a lot of motors
December 11, 2024 at 1:44 AM
How do you cool the hot things???
December 11, 2024 at 1:36 AM
Do AC motors require reactive power?

Do data centers have any motors? 😊

Yes
December 11, 2024 at 1:34 AM
Need to get some for our cats too…
December 9, 2024 at 1:17 AM
One of the best purchases I’ve ever made though
November 26, 2024 at 3:44 AM