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
87 posts
7,837 followers
384 following
Regular Contributor
Active Commenter
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Makes sense!
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That almost answers it. If most of the vars are accounted for locally, then it’s justified to have them rated in Watts
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I think so, but it’s still not 1.0 pf, right?
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Definitely, but how much? Just a ton of cap banks to cancel out hundreds of VAR from the motors?
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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
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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
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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)
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love it
she'll learn to count to 4 too!
www.youtube.com/watch?v=u8cc...
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YES! 😍
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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 😂
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One of her swings has some classical music which is probably good because otherwise she’s just listening to pop and metal from me
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Well also the compressor motors. Cooling systems have a lot of motors
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How do you cool the hot things???
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Do AC motors require reactive power?
Do data centers have any motors? 😊
Yes
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Need to get some for our cats too…
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One of the best purchases I’ve ever made though
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Ugh, this is true, and I still haven’t gotten over my love for free food as a tenured professor 😂
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Hydro-Quebec sometimes uses helicopter to smash power lines with wooden poles to remove ice and/or snow
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Ask @mjjones.bsky.social
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But then I would have been confused by this question!
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I mean, that one makes sense :)
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How much did buying each light cost?
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I believe it.
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Yay year of the dragon babies! Let me know if yours has any good insights 😍
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🤯