this post was submitted on 31 Mar 2026
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Years ago, I was driving through NY city-ish. We pulled over in a rest area and I saw a sign about turning your engine off. I thought it was the stupidest thing I had ever seen, as did many other people apparently as their cars were idling. Then I got out of my car. I was wrong. The heat was insane. I couldn’t wrap my little head around it. I started doing the engineer math thing because it didn’t make sense.
Doesn’t surprise me at all these massive data centers are creating little heat domes. The cars were bad enough, and they are a fraction of the energy.
100% of electricity burned turns to heat save light that leaves earth. Gigawatt data center? That's ~650,000 1500w space heaters.
i work for a large power company, we have a data center customer that have as many equally sized cooling towers as one of our nuclear power plants.
Pretty soon you’ll just have nuclear plants just to power data centers.
Nuclear plants to power data centers to make ai slop to make more need for data centers to feed us ai ad slop...when does it fucking end?
I hope some vigilantes start taking action against these damn wastes of space.
The disease is late stage capitalism, the symptom is a mad dash to trade our natural resources for energy and pollution. The mad dash will continue as long as we're bleeding humanity to keep the shareholders high and dry.
Didn't Microsoft try to pay for a nuclear plant to be recommissioned just to power a data centre or something?
There have been several data centers that have bought nuclear plants, including Three Mile Island, they're going to fire that bitch back up, also the Regulators have been disempowered. Propublica on the last part if I recall.
Isn't the largest data center currently something like 100MW? So "only" 0.1GW...65.000 space heaters is still insane though.
That currently exist? I believe Colossus is pushing 150MW and aiming for 300. But Gigawatt centers are on the way
we were asked 400MW for a new data center, we told them 100MW is the max we could provide for now, and increase later, we have a new natural gas plant soon to enter operation to replace two retiring coal plants, but looks like we're extending decommission targets to keep demand
Oh. I originally put megawatt and thought that was too small so I just incremented the metric exponent.
There's 33kWh worth of energy in a gallon of gasoline, and they use 0.3gal/hour when idling, so cars are pumping out 11kWh of heat just sitting there....that's a surprisingly large amount of heat.
33 kWh/gallon * 0.3 gallon/h = 10 kWh/h = 10 kW
But units aside, that is really nothing. The car itself already has about 3 m² area or about 3 kW of sunlight. The issue is the CO2 (globally) and pollution from the car (locally, causing smog etc.).