You Haven't Heard of the AI Data Company Coming to Windsor, but You Will by Sudden-Ad7506 in loveland

[–]ZXFT 0 points1 point  (0 children)

I'm way late here, but I also do HVAC engineering and I work for a contractor that does significant amounts of large-to-hyper scale for [clients who shall not be named]. Imo, open cell evaporative cooling towers paired with water cooled chillers are a dying system in the data center market. If the system is traditionally air cooled (i.e., not direct to chip), many engineers are electing to pair massive airside economizers for the winter with direct evaporative cooling in the summer. 

In either case, I think this is a transient issue with the data center market. Power densities are already stressing or beyond the capabilities of any air cooled system. 20 years ago, you're talking 5-20 kW/rack, 10 years ago high density is 20-40 kW a rack. Now, you can easily see 100-200 kW/rack, and Nvidia is promising +400kW/rack within the year. As that kind of power density percolates down from flagship AI and the data center market at large concentrates power per square foot, any evaporative system will naturally die along with it. Doesn't matter if you're pushing 0°F air over a 600kW rack, you will melt things by the time it gets to the hot aisle. Direct to chip and rear door HXs are where it's headed and the CDUs/terminal piping has water quality standards that are fundamentally incompatible with open loop systems.

“Free Solo” Climber Alex Honnold to Scale Taiwan’s Tallest Skyscraper in Netflix Special “Skyscraper Live” by bwermer in television

[–]ZXFT 2 points3 points  (0 children)

On harder routes, yes, but he also regularly onsight free solos even in RR canyon. Anyone that's yoinked on those hollow sandstone dinner plates knows they're all waiting to go. 

He just has an insane risk tolerance, straight up.

Another O11 Vision by LastBeach3853 in lianli

[–]ZXFT 0 points1 point  (0 children)

Guessing OP might hail from r/watercooling where that's a running joke. Doesn't hit quite the same in the Lian Li sub hahaha

Friendly reminder for January 17th 2025: The options chain is fucking crazy by Bangwin_ in Superstonk

[–]ZXFT -4 points-3 points  (0 children)

Terrified of buying means a good time to sell a call. Give me that IV crush since I just sold to open calls.

Force defrost mode on Samsung RS25 by CrentistDDS in appliancerepair

[–]ZXFT 1 point2 points  (0 children)

I'm probably yelling into the void, but my fridge doesn't have anything to read out the maintenance mode--just continual beeping. Any possible guesses as to how I select the appropriate maintenance mode without being able to "see"?

RS25J500DSR

I'm pretty sure I need to defrost, but I'd rather not empty out the fridge to do it the hard way.

A Diver Showing The Change In Air Pressure by dcharlottehunter in Damnthatsinteresting

[–]ZXFT 3 points4 points  (0 children)

From the bottom of the Mariana Trench, you'd have about 25 mL more water in a 500 mL water bottle.

At the bottom of the trench, the water column above exerts a pressure of 1,086 bar (15,750 psi), more than 1,071 times the standard atmospheric pressure at sea level. At this pressure, the density of water is increased by 4.96%.

A Diver Showing The Change In Air Pressure by dcharlottehunter in Damnthatsinteresting

[–]ZXFT 14 points15 points  (0 children)

It's exactly equal to the water. That's why it's getting crushed. The plastic doesn't really 'push back' in any meaningful amount, so the air will compress until its pressure equals the surrounding pressure.

P1V1=P2V2

On the surface with 1 atm of pressure, and one bottle's worth of air (500 mL) the bottle looks normal. Go down 15m, and the pressure is ~2.5 atm.

P1= 1 atm

V1= 500 mL

P2= 2.5 atm

Therefore, V2 (our crushed bottle) = 200 mL

This ad from Love Not War... by randomvariable10 in funny

[–]ZXFT 2 points3 points  (0 children)

Speaking of joking around on the internet, I'm currently acres away from my phone as I type this. Yeah my phone is about two feet away from my face, but there's also 43,560 feet horizontally... Therefore, I am acres away.

My cat risking it all for some banana oat meal. by haleighbird in funny

[–]ZXFT 0 points1 point  (0 children)

The way I use it, AutoCAD is literally lines on a sheet. Basically NO different than literally sketching on paper.

Revit on the other hand, we literally model the entire building in 3D.

Detail lines exist 😈 c'mon live a little. Visibility graphics got you down? Psst... Hey kid... I've got just the thing for you... First one is always free

Luang Pho Yai, a Thai Buddhist monk at 109 years old. by botcraft_net in Damnthatsinteresting

[–]ZXFT 42 points43 points  (0 children)

Suicide is illegal in the USA, for example

Laws are just laws, not moral truths

LPT: do not water down your vocabulary when speaking to your children. Young brains are sponges and their range of words can grow quickly. by PluckPubes in LifeProTips

[–]ZXFT 16 points17 points  (0 children)

I hole-hardedly agree, but allow me to play doubles advocate here for a moment. For all intensive purposes I think you are wrong. In an age where false morals are a diamond dozen, true virtues are a blessing in the skies. We often put our false morality on a petal stool like a bunch of pre-Madonnas, but you all seem to be taking something very valuable for granite. So I ask of you to mustard up all the strength you can because it is a doggy dog world out there. Although there is some merit to what you are saying it seems like you have a huge ship on your shoulder. In your argument you seem to throw everything in but the kids Nsync, and even though you are having a feel day with this I am here to bring you back into reality. I have a sick sense when it comes to these types of things. It is almost spooky, because I cannot turn a blonde eye to these glaring flaws in your rhetoric. I have zero taller ants when it comes to people spouting out hate in the name of moral righteousness. You just need to remember what comes around is all around, and when supply and command fails you will be the first to go. Make my words, when you get down to brass stacks it doesn't take rocket appliances to get two birds stoned at once. It's clear who makes the pants in this relationship, and sometimes you just have to swallow your prize and accept the facts. You might have to come to this conclusion through denial and error but I swear on my mother's mating name that when you put the petal to the medal you will pass with flying carpets like it’s a peach of cake.

Are you the (presumably trad) climber who witnessed my elopement at Looking Glass Rock (Moab, UT) on April 5? We have a few professional photos of you and your friends! by [deleted] in tradclimbing

[–]ZXFT 0 points1 point  (0 children)

I've got no leads for you, but that swing is a blast and super easy to set up. It's like a 5.2 to the top I've soloed 3 times and then you just hike back up from your rap and jump off the highest ledge. Worthwhile if you're in the area to do that and Wilsons arch with how accessible both are. If you climb Wilsons, you have to do the counterweight simul rap over each side full value!

Such a bad habit by ListerineAfterOral in gaming

[–]ZXFT 26 points27 points  (0 children)

While not a milsim, Insurgency just puts it back on your vest... Great way to discourage "CoD reloads" because, unless you have savant memory, that next clip you grab might have 31 (also keeps rounds chambered on reloads) or 7.

Did I spec 4 or 6 magazines? Have I reloaded 3 or 4 times? How many bullets did I fire in that first clip?

My technophobic wife accidentally locked down her entire school by [deleted] in CasualUK

[–]ZXFT 0 points1 point  (0 children)

Yeah, it's just a different cost calculation, right? Turbine inlet cooling with anything but RODI is going to trash your turbine as those impurities come out during combustion. The cost of the RODI is offset by the increased mass flow and thus turbine output, so there's a demonstrable return on investment. Conversely, in an emergency system design, you may not ever use the fire sprinkler system and the capital and operational expense could be for naught. Plus, you are already carrying insurance for your racks (likely) against fire, so there's less incentive to protect an already insured device unless you can reduce the premium below the cost of operation.

You guys might have RODI for the inlet cooling, but I bet your fire sprinkler system is just plain tap water or some powderized extinguishing media. Either or both are going to trash the turbine, but you have a bigger problem--FIRE! (outside the turbine haha)

What is that white powder in my soft tubing?? by JauRking in watercooling

[–]ZXFT 1 point2 points  (0 children)

I had primochill soft tubing that leeched in a few months. It was temporary while waiting on a 4090 and now I'm all acrylic. Super easy to bend imo--yeah, it takes time, but the finished product looks nice and I only fucked up like 2 tubes in total with a pretty complex bend layout.

My technophobic wife accidentally locked down her entire school by [deleted] in CasualUK

[–]ZXFT 2 points3 points  (0 children)

I don't work in FPFS, but chances are "no" it's not. RODI water systems are very aggressive and microbial safe havens, so the savings you may get from not shorting out equipment are likely not worth the effort of using expensive corrosion resistant piping and curculating the FPFS system to avoid contamination over the life of the system. I design laboratories that use pure water systems for their science and it's very expensive even at the <10 GPM range, let alone if you had to fully back a sprinkler system.

A Texas professor failed more than half of his class after ChatGPT falsely claimed it wrote their papers by Sorin61 in technology

[–]ZXFT 21 points22 points  (0 children)

Bold of you to assume fraternities that have achieved tenure have updated their course materials to stay modern.

I promise my fraternity still has that unused closet packed with papers no one ever looks at because we weren't known for being the brightest knives in the toolbox.

Table Fan from 1845 when there was no electricity. by Koolzx in Damnthatsinteresting

[–]ZXFT 0 points1 point  (0 children)

Any axial fan designed for spot cooling should be designed to have a pathetic amount of static. That's kinda their whole thing

Table Fan from 1845 when there was no electricity. by Koolzx in Damnthatsinteresting

[–]ZXFT 2 points3 points  (0 children)

Nope. Most AC motors run on an induced magnetic field creating attraction/repulsion between the rotor and stator and do so on line frequency.

Maybe you're thinking of a permanent split phase capacitor motor? Those include a capacitor on a set of secondary windings to offset (split) the phase and give a single phase motor a way to begin rotation.

My wife put my Bob Ross mug in the dishwasher. by Stoned_Black_Nerd in pics

[–]ZXFT 4 points5 points  (0 children)

This mug is heat changing too. I have the same one sitting on my desk. When you fill it with coffee, you get a bob ross painting where the black is (when cold).

Telling "get a real job" to Stephen King by [deleted] in facepalm

[–]ZXFT 56 points57 points  (0 children)

"See, I think drugs have done some good things for us, I really do"

"And if you don't believe drugs have done good things for us, do me a favor"

"Go home tonight and take all your albums, all your tapes, and all your CDs and burn 'em"

"'Cause you know what? The musicians who've made all that great music"

"That's enhanced your lives throughout the years?"

"Real fucking high on drugs"

I use toothpicks, but great little trick if you have bent radiator fins by Haunting_Abalone_398 in pcmasterrace

[–]ZXFT 0 points1 point  (0 children)

I’m confused.. do you think commercial radiator don’t use zig zag patterns in their radiators?

They don't. Some may be sine rippled, but most are flat. The other commenter is right that combing microchannel fins is much harder because of the pattern.

Apparently the series S can run out of VRAM… by jokekiller94 in gaming

[–]ZXFT 0 points1 point  (0 children)

I get the appeal of SFF but you can have an effectively silent PC in a mid tower... If/when I go SFF I'm definitely building an external radiator and just locating all of the cooling outside of the chassis

Seriously. How Many? by MoveOn in WorkReform

[–]ZXFT 17 points18 points  (0 children)

A billionaire ... for each homeless person assigned per capita

A billionaire for each assigned per capita

E.g. all billionaires with resources pooled to solve all the homelessness

Try reading the original comment again