Just imagine the amount of torque that not only the engine has but the fan as well that would incredibly hard to stop while running without using emergency stop
Emergency stops exist on machines like this but they are highly impractical. If something bad happens and the whole thing still runs, there is no point in stopping it. Stops are also always slow, even with active braking.
That's a very cool fan indeed yet it seems kind of strange having the top half open like that I would think the entire blade would be enclosed in a safety cage
That fan blade is so big, the outer edges of the blade are traveling a lot faster than the axle of the motor that's driving it! I would want that big steel cage there in case something breaks off one of the blades and goes flying, wonder why they only half covered it with mesh protection?
i wonder what the specs are on this blower and is this the only fan for the whole tunnel? i would bet this beast at full speed can make some strong wind
I would say that's not the nominal speed of the impeller, seems too low. Nominal is 132 cubic M /sec (279692.16 cfm) from museum picture in this video ua-cam.com/video/dv0BjHNK5W8/v-deo.html . I think the motor is just for demonstration purposes. Seems to small also for the nominal job. It's a Walker fan impeller. They were commisioned in 1934.
I don’t understand the design of this thing, there’s no curvature in o the blades which imply a centrifugal design but the case and everything else isn’t shaped for that either. How does this work? Looks like it would just spin around and create a lot of noise / turbulent air lol.
@@moonprofilepiclol454 Care to elaborate a bit genius? I probably have more time researching and training the aerodynamics and effects of propellers than you'll have in 10 f'ing lifetimes, but sure - unleash your childish youtube zing. The blades AREN'T curved (fine, easier to build) but the blades appear to have nearly two perpendicular surfaces, one of which is in-line with the rotation, which would hint at more of a centrifugal design. With the lighting and camera angle, it's impossible to tell - hence my confusion. If it was a typical fan-type circulation pump, you'd expect a medium-coarse pitch fan blade. Again, feel free to clarify since you obviously know far more about this installation and its engineering specifications than I ever will.
Most of the noise seems to be from the variable frequency drive, that's the high pitched buzzing, then there's the transmission noise the lower humming noise. The fan itself is almost silent.
We have VFD speed controlled trams in Adelaide Australia, they totally smash AM radio broadcasts as well, all you get is a modulated high pitched whine through the radio as the tram goes past.
[variable frequency drive intensifies] I'm actually wondering if they hadn't run the optimization routine yet - normally the system will be really loud like this and efficiency may be off till you let it autotune
The motor is being driven by a VFD (variable frequency drive) and the carrier wave / pulses to "imitate" the wave form (goes from 1 to 50hz slowly for motor "soft start). These pulses cause ringing and harmonics in the motor windings / magnets and vibrate causing the shrill sound.
wow!! Id love to see that... what was on the other side of the fan? and where does it lead.? and how many RPM's does that fan run at. ? Very cool though
I'm glad to see that I don't live in the only country that fills a fan chamber up with people that have no idea what they are looking at, stick shiny yellow hardhats on them, and start the fan. Well done but wow that gearbox is noisy.
I wonder if they 'jog' the motor a few times first as test for fan obstruction or a warning to anyone in the plenum to be prepared. Certainly a fair bit of lash in the transmission.
You have no idea what you're talking about yet you're criticising them? That isn't gearbox noise you're moaning about, it's the VFD's carrier frequency. Certain lifts, trains and trams make that exact same noise.
Under 35, even. I counted approximately 25RPM, when it was full speed (Count the seconds it takes for one blade to do one full revolution, convert from seconds per revolution to revolutions per minute)
I'd appreciate if you could throw that link at me if you could find it. Pretty interesting stuff. Wouldn't be entirely surprised if it could make it up to 60
As someone who is fascinated by bridges and underwater tunnels, this is so cool.
Become an engineer or something lol
I'm a big FAN of this, it was only on half speed? Oh no
Full is useless it would fly on full
Lol
Ahh I got the joke 🤣
Just imagine the amount of torque that not only the engine has but the fan as well that would incredibly hard to stop while running without using emergency stop
Torque is the work either into the fan to accelerate it, or from the fan when it stops. The work is pushing against the inertia.
It might explode if you hit the emergency stop. Just saying.
Emergency stops exist on machines like this but they are highly impractical. If something bad happens and the whole thing still runs, there is no point in stopping it. Stops are also always slow, even with active braking.
I was about the comment the exact same! These fins look heavy!
Stop category 0 is the same as just letting it coast down
That massive beast looks terrifying
Creeperboy I know I thought it was just me
funny seeing you here
@@porcupinepunch6893 I guess I just appear everywhere I see something mechanical
Immediate anxiety when it starts to build up speed
Plot twist: the fan is red from the people who got sucked in
I’m not a big fan of this comment 😂.
Another twist: It cant suck people in since its not in the right way. Second hmm its wired also
Sounds like it's running from a variable frequency drive...
An old one too they don't scream like that anymore
@@NIGHTLAMP12345678 a lot of them do still use lower frequencies, especially in industrial environments like this
Actually hearing like 2 kHz
The screech is from square waveform in the vfd
They have to soft start something like this or the London light will dim.
now mabye my computer wont overheat when i play minesweeper
MOM ITS NOT WHAT IT LOOKS LIKE not even this can cool down an Alienware laptop
MOM ITS NOT WHAT IT LOOKS LIKE s5
😂😂😂😂
The lighting on it makes it seem like a end-movie villain. Pretty awesome!
The engineers are like, less than half the height. Very cool fan!
New fear unlocked
Definitely.
Anxiety awakening.
Wonder what would happen if that massive bugger got up to something like 360rpm, or hell, even 1000
probably shrapnel, but yknow
Will S. If it was that fast, either run as fast as you can away from the fan or WOAH YOU DEAD BRADAH!!
horrible inefficiency ;)
That is of course assuming you don't get the tip speed so high it blows up
Scarey.
That's a very cool fan indeed yet it seems kind of strange having the top half open like that I would think the entire blade would be enclosed in a safety cage
Efficiency becomes an issue when you use grating or screens of any kind
we like the big electric motors that drive something like that ;-)
Das piepen von der Pulsweitenmodulation bei Elektromotoren ist immer schön anzuhören.
Insane, I love those big machines
At least the hamster didn't drown...
wait how
1:18 I would be terrified to see this thing starting up after hearing what he said!
Would not want to be in that room.
Imagine that you are in this room alone in 3 am and suddenly this beast powering on
Is 2:59 ok?
Heart attack for me.
Best sleep I ever got
That fan blade is so big, the outer edges of the blade are traveling a lot faster than the axle of the motor that's driving it! I would want that big steel cage there in case something breaks off one of the blades and goes flying, wonder why they only half covered it with mesh protection?
That is a massive fan
How about some data! CFM, HP, Etc?
Oh, I wanted to see it go full blast, but this is still "COOL"!
I wanted to see full speed but I would not be in that room when it was at full speed.
@@scottboyd1301: Haha.
i wonder what the specs are on this blower and is this the only fan for the whole tunnel? i would bet this beast at full speed can make some strong wind
I was waiting for all the hard hats to fly off into the fan!
I wish i could watch something like that irl its so interesting
Total recall vibes 🤪
I do like this inverter's sound
The Real " Daylight Movie"
Close, but the tunnel in “Daylight” is in New York.
igbt inverters? almost sounds like a electric modern train.
I'm amazed it still works as there is a shit load of copper in that motor. Locals must be afraid of being undergound.
I doubt it's copper if it's in Liverpool. It would have walked years ago.
Sounds like a 378 accelerating very slowly
"Will you start the fans please!"
*blows whistle*
I want it in summer.
Wow I only counted 9 R P M"s before they were asked to move on !! Wonder what full chat is ???
Imagine if it gets at highest speed
feels like aperture science
Look like a Portal 2
I need this fan for my laptop
It's is great CPU cooler👍👍😂😂
0:50 LOL it needs some WD40 up there
I think it might have gotten to 35 RPM , wow ?
About 50 RPM I believe.
Imagine something like this getting up to 3000rpm
My computer when I turn it on and it already knows what’s gonna happen.
the shaft and the joint need protection, the fan needs a spiral like jet ogive or concrete mixers
Regulations schmegulations!
Are you going to pay the bill for it Pats ?
I can feel the inetria
How about a star-delta start up?
What are the electrical requirements of this fan?
Centrifugal fan?
sounds like a class 333
XDDD ye, and the electrostars trains
sounds like 2009 stock for me
Anyone knows about how much m³ that one can shift ?
All of them
Looks like a giant oven fan!
Maybe it was true
Wonder how many amps it's drawing when it gets noisy
portal 2 vibes from this
I would say that's not the nominal speed of the impeller, seems too low. Nominal is 132 cubic M /sec (279692.16 cfm) from museum picture in this video ua-cam.com/video/dv0BjHNK5W8/v-deo.html . I think the motor is just for demonstration purposes. Seems to small also for the nominal job. It's a Walker fan impeller. They were commisioned in 1934.
I just love how..Everyone in comment section are industrial engineers..😍
I'd be like: OH HELL NO!!!
Ferry cross the mersey.
I don’t understand the design of this thing, there’s no curvature in o the blades which imply a centrifugal design but the case and everything else isn’t shaped for that either. How does this work? Looks like it would just spin around and create a lot of noise / turbulent air lol.
@@moonprofilepiclol454 Care to elaborate a bit genius?
I probably have more time researching and training the aerodynamics and effects of propellers than you'll have in 10 f'ing lifetimes, but sure - unleash your childish youtube zing.
The blades AREN'T curved (fine, easier to build) but the blades appear to have nearly two perpendicular surfaces, one of which is in-line with the rotation, which would hint at more of a centrifugal design. With the lighting and camera angle, it's impossible to tell - hence my confusion. If it was a typical fan-type circulation pump, you'd expect a medium-coarse pitch fan blade.
Again, feel free to clarify since you obviously know far more about this installation and its engineering specifications than I ever will.
@@moonprofilepiclol454 you're an absolute prick mate, he's asking a legit question.
It's very noisy?
yup
Most of the noise seems to be from the variable frequency drive, that's the high pitched buzzing, then there's the transmission noise the lower humming noise. The fan itself is almost silent.
whorayful where is it located?
I'm in Australia but I believe this is in Liverpool England, under the Mersey RIver.
@@whorayful9361 That's right. The tunnel connects Liverpool and Birkenhead. It's an old and deep network of tunnels under the Mersey.
imagine hearing the same stupid jokes every day. makes my head spin just thinking about it
That's a pretty loud whiner!
Who's VFD is running that?
It's God's VFD.
what drives it??
6600 volts drives the fan
Metro Exodus IRL
VSD by the sound of it
What is that supposed to be for😅❓
This motor is on a VFD...
Marshal Jim Duncan yeah too bad, hate that noise.
Me too, very annoying...
I have a feeling the new trams in Sheffield use VFDs as well, seems to not only be directly audible but also through the PA system as well :(
We have VFD speed controlled trams in Adelaide Australia, they totally smash AM radio broadcasts as well, all you get is a modulated high pitched whine through the radio as the tram goes past.
*eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee*
[variable frequency drive intensifies]
I'm actually wondering if they hadn't run the optimization routine yet - normally the system will be really loud like this and efficiency may be off till you let it autotune
I WANT TO MAKE THIS SPIN AT 4000RPM THAT A SPEED OF DELTA AFB0912VH!!
this is maximum speed ?
What’s the noise
It's the motor.
The motor is being driven by a VFD (variable frequency drive) and the carrier wave / pulses to "imitate" the wave form (goes from 1 to 50hz slowly for motor "soft start). These pulses cause ringing and harmonics in the motor windings / magnets and vibrate causing the shrill sound.
Why would you record that long just to not show it at full speed
Probably to dangerous
Nobody: Fans from Jolly 3
what are these fans?
Jaden Consterk I'm guessing mine ventilation fans
Tunnel ventilation for the Queensway Tunnel in Liverpool. Been there, saw it :)
vent vans in queensland
wow!! Id love to see that... what was on the other side of the fan? and where does it lead.? and how many RPM's does that fan run at. ? Very cool though
Where's my fuckin 50Hz?
Oh.......My.....God.....
Is that all you could come up with?
What is the purpose of these fans?
3 Years late but these are for ventilating the mine complex. In case of fire, it can be uses to pull smoke out.
@@niccatipay It says Mersey Tunnel, I assumed it was for ventilating one of the tunnels under the river Mersey in Liverpool.
Firino
I'm glad to see that I don't live in the only country that fills a fan chamber up with people that have no idea what they are looking at, stick shiny yellow hardhats on them, and start the fan. Well done but wow that gearbox is noisy.
I wonder if they 'jog' the motor a few times first as test for fan obstruction or a warning to anyone in the plenum to be prepared. Certainly a fair bit of lash in the transmission.
You have no idea what you're talking about yet you're criticising them? That isn't gearbox noise you're moaning about, it's the VFD's carrier frequency. Certain lifts, trains and trams make that exact same noise.
I need this to get the weed smoke out of my house
The fan looks like bad CGI
als Klolüfter reichts grad so
They were all watching onlyfan
Amazing fan but, I hate the shrill sound of modern AC induction motors! Can't beat the deep hum of old DC stuff!
That's the carrier frequency of the VFD that's running this motor. Probably around 12-15khz. Yes it's annoying, though.
what's the speed of that
Jeanne bréant Under 60 rpm.
thank you guys ;)
Under 35, even. I counted approximately 25RPM, when it was full speed (Count the seconds it takes for one blade to do one full revolution, convert from seconds per revolution to revolutions per minute)
Will S. I've seen another video where the specs are shown. Hope I can find it.
I'd appreciate if you could throw that link at me if you could find it. Pretty interesting stuff. Wouldn't be entirely surprised if it could make it up to 60
Kinda sus.
Por lo visto de acá sacó Half Life los modelos para los ventiladores del juego
typical high pitch noise from a scouser.
What is a scouser?
VFD
I thought this was a bit from Portal 2 hahaha
My hair dryer has more blow than that . Pathetic.
It is looking like blood on leaf human get sucked
50hz 🤮