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So Dave has brought this to my attention, this company claims to be selling the "Worlds First" pancake printer, http://www.guruhub.tv/testing-out-a...gn=fb-us-mo-mrk but, as we all know, this is a tech that has already been perfected.  This injustice will not stand. #rememberomaha Discuss
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Mar 6, 2018 07:08
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ExplodingSims posted:I'm going to the training facility in a town called Lyndhurst What the hell are you training in? Hiking the Appalachian Trail?
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Mar 6, 2018 07:28
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Working on industrial refrigeration systems. This includes working on ammonia systems, and other weird stuff like that. Basically the biggest kind of big systems, stuff like this:  
ExplodingSims fucked around with this message at 07:50 on Mar 6, 2018 |
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Mar 6, 2018 07:46
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This might sound like a dumb question but I've always wondered: On huge HVAC systems such as those that flow thousands (or tens of thousands) of CFM is there any risk to getting sucked into the airflow or are pressures too low for that to really be a concern? I seem to recall I read somewhere that large HVAC systems can flow as much air in lb/sec as some jet engines which led me down this morbid line of thought. 
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Mar 6, 2018 07:50
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ExplodingSims posted:Working on industrial refrigeration systems. This includes working on ammonia systems, and other weird stuff like that. Ah, is that the kind of thing that they build near huge railway/trucking depots to basically keep a whole warehouse cold?
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Mar 6, 2018 07:55
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Plinkey posted:Ah, is that the kind of thing that they build near huge railway/trucking depots to basically keep a whole warehouse cold? Pretty much, yeah. This is the kinda stuff used in factories to keep giant walks in cold, or tons of product chilled, or running process chillers. Previa_fun posted:This might sound like a dumb question but I've always wondered: On huge HVAC systems such as those that flow thousands (or tens of thousands) of CFM is there any risk to getting sucked into the airflow or are pressures too low for that to really be a concern? I haven't actually worked on something this big yet, but I think for the most part the pressures are low enough that even with moving 1000s of CFMs there's not a huge risk of getting sucked in. Even if someone did get sucked in they're probably just end up crashing through the ducts before they got too far. Despite what Die Hard taught you, ducts are flimsy as poo poo.
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Mar 6, 2018 08:00
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ExplodingSims posted:Pretty much, yeah. This is the kinda stuff used in factories to keep giant walks in cold, or tons of product chilled, or running process chillers. Location makes way more sense then.
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Mar 6, 2018 08:03
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ExplodingSims posted:Pretty much, yeah. This is the kinda stuff used in factories to keep giant walks in cold, or tons of product chilled, or running process chillers. It's also inefficient to create that level of vacuum/flow unless you really need it i.e. to move an aircraft. If you don't you size bigger ducts and lower speeds for the same flow rate.
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Mar 6, 2018 08:07
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cakesmith handyman posted:It's also inefficient to create that level of vacuum/flow unless you really need it i.e. to move an aircraft. If you don't you size bigger ducts and lower speeds for the same flow rate. This. CFM is duct area X velocity. Not only does creating higher flow use an unnecessary amount of power, but higher velocity means more drag losses, due to skin friction with the duct walls. On the other hand, low-velocity, large-area systems take up more physical space, but are much cheaper to operate in terms of power input. Low velocity means low dynamic pressure means no real You're in more danger from the electrical supply. And (on those lovely ammonia systems) refrigerant leaks.
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Mar 6, 2018 08:17
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Previa_fun posted:This might sound like a dumb question but I've always wondered: On huge HVAC systems such as those that flow thousands (or tens of thousands) of CFM is there any risk to getting sucked into the airflow or are pressures too low for that to really be a concern? I mean... for what it's worth, I've worked in a building with mainframes before (oh god that dates me). I got a tour of the basement a few times. They had explosion-proof rooms for the UPS batteries (back when they were literal tons of lead acid batteries connected via massive bus bars, and simply walking in there and brushing up against anything was guaranteed death), and there was an incredibly thick door with equally thick glass to get to the air handlers for the underfloor cooling in the computer rooms. He mentioned he'd been told to never open that door, mostly because of the vacuum (opened outward anyway, while the UPS room door opened inward). You needed respirators and full body suits for the battery rooms.  This was a 1960s or 1970s era data center that was still running IBM System/370 mainframes in the late 1990s (former JC Penney credit card data center; Alliance Data bought their private label credit card brand and associated businesses - I worked in tech support, roommate worked in their NOCs and showed me around this particular facility a few times when he was bored). tl;dr I'm sure that kind of air flow is very possible, but I doubt you'd run into it much outside of some seriously antiquated settings today. randomidiot fucked around with this message at 08:30 on Mar 6, 2018 |
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Mar 6, 2018 08:27
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Enourmo posted:This. CFM is duct area X velocity. Not only does creating higher flow use an unnecessary amount of power, but higher velocity means more drag losses, due to skin friction with the duct walls. On the other hand, low-velocity, large-area systems take up more physical space, but are much cheaper to operate in terms of power input. Low velocity means low dynamic pressure means no real Arc flash is no joke. That poo poo'll gently caress you up good. Also, for what it's worth, once you get up to a certain size of unit, you pretty much stop using return ducts, and just have a common return, or a filter room.  Have fun changing out like 100 filters in one go! Yu-Gi-Ho! posted:I mean... for what it's worth, I've worked in a building with mainframes before (oh god that dates me). I would imagine they mostly wanted that door kept shut so goons wouldn't go using that space as a storage area/mastabatorium. I can only imagine what a lead-acid battery bank must of been like though. Yikes.
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Mar 6, 2018 08:38
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ExplodingSims posted:Also, for what it's worth, once you get up to a certain size of unit, you pretty much stop using return ducts, and just have a common return, or a filter room. Honestly that is so much easier and better than a hundred filters spread around the place because guarantee there will be 5-20 that will be so hard/awkward to get to that the previous guy never actually changed them. This way you truck a pallet of filters in and just have a steady couple of hours finding the drat clips you just dropped. Protip a big rare earth magnet in one leg pocket and slap any loose hardware against the outside of the pocket to keep it in place. Then you find one of the drat things is stainless...
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Mar 6, 2018 08:50
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Datacenters still typically have these rooms with huge banks of lead-acid batteries (large single-cell ones in long series for a few hundred volts), but for whatever reason it's nowadays deemed safe enough that they even let nosy customers like me go in and look. Nothing seemed extra explosion-proof and no spacesuits involved.
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Mar 6, 2018 10:08
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The best thing about rooms full of lead acid is that it's DC so if you touch it you can't let go, and the available fault current and circuit voltage is truly obscene so short circuits turn into high energy physics experiments very quickly. How many pounds of copper did you want instantly liquefied or vaporized? How many pounds of it do you want flung violently against the wall? OKAY
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Mar 6, 2018 14:48
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ExplodingSims posted:Arc flash is no joke. That poo poo'll gently caress you up good. I did work in a Yahoo data center and both sides had a hallway like this down the entire length of it to feed air into the cold aisle. It was massive.
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Mar 6, 2018 15:42
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Customer installed something similar to these Liebert units to support one of our systems. Doors are covered in scary high voltage warnings but otherwise they look like just another large cabinet. ExplodingSims posted:Also, for what it's worth, once you get up to a certain size of unit, you pretty much stop using return ducts, and just have a common return, or a filter room.  ExplodingSims posted:Basically the biggest kind of big systems, stuff like this:
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Mar 6, 2018 15:45
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ExplodingSims posted:Pretty much, yeah. This is the kinda stuff used in factories to keep giant walks in cold, or tons of product chilled, or running process chillers. The first time I saw an ammonia cooling system was a brewery tour, apparently Point Brewery in Steven's Point, WI still uses it. The pipes didn't look all that well maintained, to be honest. I figured it was for fermentation control, and chilling the bright tanks, now I bet it also did the cold warehouse storage too. You can see the German march across Wisconsin by the founding date of the massive older breweries. You can also see the incremental change in technology, too.
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Mar 6, 2018 17:58
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ionn posted:Datacenters still typically have these rooms with huge banks of lead-acid batteries (large single-cell ones in long series for a few hundred volts), but for whatever reason it's nowadays deemed safe enough that they even let nosy customers like me go in and look. Nothing seemed extra explosion-proof and no spacesuits involved. I do a lot of work at power plants, and they have similar battery banks. Anywhere from maybe 30 to 150 lead-acid batteries in series, anywhere from 50-200 pounds each. They have signs on the doors requiring respirators and suits but nobody really bothers unless they're servicing the batteries. And power plants are usually extremely strict about PPE, at least the ones I've been to.
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Mar 6, 2018 18:20
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ExplodingSims posted:I'm going to the training facility in a town called Lyndhurst Yeah, as shortbus said, you're about 90 minutes from me. You're pretty close to Charlottesville, though, which is a pretty nice college town with stuff to do, things to eat/drink, a city square with neat shops, etc. If beers are indeed your jam, craft breweries are exploding right now in VA. Parkway Brewery, near me, hosts live music all the time, everything from country to electronic ambient. You seem to like exploring and photographing cool nature stuff, which we have in spades here in the western parts of the state. If you want to take a little daytrip on your downtime to drive the Blue Ridge Parkway, my offer of a meetup stands! Pop over to the VA/WV regional thread, lots of friendly VA goons there that can probably point you in the direction of fun things to do (or crappy things to avoid) close to where you'll be staying. Link: https://forums.somethingawful.com/showthread.php?threadid=3032597
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Mar 6, 2018 21:04
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Oh man I gotta jump into the refrigeration chat. I was working on a fire alarm system for a warehouse full of gigantic chillers in Saskatchewan. There's a potash mine that goes like a kilometre deep but there was too much groundwater so they went we must freeze the earth itself and the ground around the shaft is artificially induced permafrost, basically. I was in this crazy set of brutalist buildings one time too, the whole mechanical room was above two separate crawlspaces, each with their own giant open-air "chimney" I guess and the spaces acted as a passive airflow system for the complex. The airflow in them was insane. The chimneys were built into the exterior walls and from looking you could never tell there was a giant 9 storey shaft that just opened up at the top.
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Mar 7, 2018 01:18
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ExplodingSims posted:Arc flash is no joke. That poo poo'll gently caress you up good. This is kinda like that data center I mentioned... just really tiny. It ran at least 100-200 feet past what I could see from the available lighting at the door (one light fixture at the door, plenty more available once you were inside). Also, the intake and exhaust sides were severely slanted (about 30 degrees?). I wouldn't want to be in there for a filter change with it running, I can already feel my ears popping. I was told that even getting the door open required shutting down the underfloor HVAC, due to the vacuum making it too difficult to open the door? It's been nearly 20 years, so my memory may not be so great, but I remember it being A VERY BIG DEAL to gain access to the filter room and battery room.
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Mar 7, 2018 09:56
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ExplodingSims posted:I'm going to the training facility in a town called Lyndhurst Are you still in the Lyndhurst area? I can recommend some places to eat out there.
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Mar 10, 2018 12:47
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Yu-Gi-Ho! posted:tl;dr I'm sure that kind of air flow is very possible, but I doubt you'd run into it much outside of some seriously antiquated settings today. So in other words, important government services and University registration systems.
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Mar 10, 2018 21:50
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DarkSol posted:Are you still in the Lyndhurst area? I can recommend some places to eat out there. I haven't left yet. I fly out on Monday. I'd love some recommendations though!
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Mar 10, 2018 23:17
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https://imgur.com/gallery/5bsH8
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Mar 11, 2018 22:45
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I am loving in love. 
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Mar 11, 2018 23:15
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EVERYWHERE 
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Seminal Flu posted:I am loving in love. I want to see it corner. 
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Mar 11, 2018 23:30
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ExplodingSims posted:I haven't left yet. I fly out on Monday. gently caress... I just saw this.  I was going to suggest The Shack in Staunton, but they aren't open on Mondays.Weasie's Kitchen in Waynesboro is pretty legit if you like a greasy spoon. (Waynesboro sucks balls otherwise. I grew up there.)
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Mar 12, 2018 03:29
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Friendship ended with DAVE CARROT TOP is my new BEST FRIEND.  E. DarkSol posted:gently caress... I just saw this. I mean I haven't left Las Vegas.. lol I'm spending the next 2 weeks out there, so you've got time.
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Mar 12, 2018 06:10
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Mar 12, 2018 06:15
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uh....uh.....um..... 
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Mar 12, 2018 07:18
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ExplodingSims posted:CARROT TOP is my new BEST FRIEND. For a minute I thought you'd picked up a cheap hooker. The years have not been kind to him.
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Mar 12, 2018 07:50
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Yu-Gi-Ho! posted:For a minute I thought you'd picked up a cheap hooker. The years have not been kind to him. You act like he's not just a cheap hooker? Wait.... We talking about C-Top or Larry?
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Mar 12, 2018 12:02
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I wanna do real refrigeration again... I started off with r11 centrifugal chillers and ended up depressed with domestics
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Mar 12, 2018 15:41
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Holy poo poo. edit: https://www.youtube.com/watch?v=LjvKaC-UDNM Darchangel fucked around with this message at 17:00 on Mar 12, 2018 |
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Mar 12, 2018 16:57
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ExplodingSims posted:Friendship ended with DAVE Sweet Jesus, Carrot Top looks... not well at all. He reminds me of Jocelyn Wildenstein. And I'll think up some more ideas of places to eat. Really depends on how far from Lyndhurst you're willing to go.
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Mar 12, 2018 22:47
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ExplodingSims posted:Friendship ended with DAVE Looks like you're pulling a Weekend at Bernie's there dogg
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Mar 13, 2018 00:26
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ExplodingSims posted:Friendship ended with DAVE You mean that Madame Toussade wax replica of the Elephant man?
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Mar 18, 2018 05:23
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Darchangel posted:Holy poo poo. How does it steer?
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Apr 14, 2018 23:03
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freelop posted:How does it steer? Steer?
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Apr 14, 2018 23:05
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