@ryanstruk1: Rolled is a "slang" for expanding since the expander has rollers on them. The tubes are expanded with each revolution of the mandrel. The mandrel is tapered and the slots in the cage that holds the rollers is angled. So when it is rotated the mandrel draws itself in and the rollers rotate and expand the tube out. We expand until the tube wall thickness is reduced by 4-5%. That is not teflon, it is "Lube-a tube" tube expander lubricant that is water souluble.
I drilled en reamed hundreds of pipeplates and baffles for heat exchangers. It was avery responsible job, no mistakes where allowed because of the mostly very expensive materials!!
Tubes are free on baffles, which direct flow in heat exchangers. Tubes are expanced to tube sheet at the length of 90% of tube sheet thickness if I remember right. For oil industry we made on previous workplace tube bundles with tube sheets from about 40mm thickness to +300mm. Tubes are easily removed if needed. We used modified Hss-drillbit on magnetic drilling machine or on radial drilling machine.
well it a good vid i owned a company that made these things and charge air coolers for marine tankers for about 20 years and my only issue would be to say dont sand the whole plate just use a cone drill to tidy the sharp edge of the drilled hole sading the plate removes its nanural protective coating but neat job
It looks like an oil cooler for an air compressor or skid unit. Instead of brazing the tubes to the baffles, we typically use tierods in the stationary tubesheet & cut spacers. We've retubed these before and found the shellside velocity had stacked the baffles on one end. all in all it's a great looking bundle. We use crisco some times while rolling also.
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
They are rolled with an expander. The drill is an electric roll motor and it is connected to a controller that measures amperage draw. The controller is set to reverse at the correct expansion. The correct expansion is 4 to 5% wall reduction. The technician measures the ID of the tube sheet, the OD of the tube, the ID of the tube and the wall thickness of the tube. Then does simple math to calculate what the ID should be after expansion. Set controller to reverse at that ID thru trial and era.
Crosstheriver Even we can calculate by simple formula formula = [% of thinning x (2 x Average thk of tube)+ Average tube hole size - 2x Average thk of tube]
@engineerdr These are baffles, their function is to lengthen the path of water flow between tubes. It also makes the flow more turbulent by passing the water perpendicularily to the tubes, creating vortices. This is a shell and tube HE without the shell. A full plate would block the flow.
Going to replace one a little bigger than that in one of our buildings next week. Alot of work and materials go into them now wonder they cost so much.
@JADEKINGsRULE dude... like ... I mean... like dude... dude... wtf... dude! Yeah, keep knocking engineers. You're really impressing people with *your* display of intelligence.
no matter about the size if the correct expander is used at the right speed and the hole is drilled the correct size compaired to the tube it will be good for 10 bar easy but dont use hard tempered tube cause it will crack !!
It depends of how much heat you want to exchange.. Its a project parameter. Usually its known the fluids. For the primal fluid, the one you want to cool or heat, is known the initial and final temperatures and for exchange fluid (usually water) is known the initial temperature. From a energy balance you will be able to find the final temperature and how much heat was exchanged. You also need to know the flow conditions and they properties as Re, Pr, u and Nud. You should know the flow rate of the primal fluid and estimate the needing exchange fluid flow rate. Using heat exchange knowledge, you will be able to find the total length needed for the tube. Knowing the length, and using standards cooper diameters you can decide the diameter and length of the shell based in your real conditions (space).
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
how come u guys don't crimp the tube on either side of baffle, is a little quicker and if u need to pull the tube u can drive a rod down the tube and round it out and revmove the tube...
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970 mannising2@gmail.com
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
it is a good video. I am a Chemical Engineering grad. student, we use HEXTRAN and HTRI to design and rate HEX. But this guy made everything so simple.
I am a chemical eng., this is an excellent video to understand heat exchangers.
5 up, veryyyy goood
@ryanstruk1: Rolled is a "slang" for expanding since the expander has rollers on them. The tubes are expanded with each revolution of the mandrel. The mandrel is tapered and the slots in the cage that holds the rollers is angled. So when it is rotated the mandrel draws itself in and the rollers rotate and expand the tube out. We expand until the tube wall thickness is reduced by 4-5%. That is not teflon, it is "Lube-a tube" tube expander lubricant that is water souluble.
good , My major is heat trasnfer,your video make me learn more about heat exchanger
Seems like fun!
I drilled en reamed hundreds of pipeplates and baffles for heat exchangers. It was avery responsible job, no mistakes where allowed because of the mostly very expensive materials!!
@shogoonn thank you very much sir.you have increased my knowledge :)
Tubes are free on baffles, which direct flow in heat exchangers. Tubes are expanced to tube sheet at the length of 90% of tube sheet thickness if I remember right. For oil industry we made on previous workplace tube bundles with tube sheets from about 40mm thickness to +300mm. Tubes are easily removed if needed. We used modified Hss-drillbit on magnetic drilling machine or on radial drilling machine.
jani73
Yes , like for 40 mm tube sheet , tube expansion is upto 35-36mm
well it a good vid i owned a company that made these things and charge air coolers for marine tankers for about 20 years and my only issue would be to say dont sand the whole plate just use a cone drill to tidy the sharp edge of the drilled hole sading the plate removes its nanural protective coating but neat job
It looks like an oil cooler for an air compressor or skid unit. Instead of brazing the tubes to the baffles, we typically use tierods in the stationary tubesheet & cut spacers. We've retubed these before and found the shellside velocity had stacked the baffles on one end.
all in all it's a great looking bundle. We use crisco some times while rolling also.
Solder it a old way and also weakens the tubes .
August O
Yes we can use space tubes in between baffles to keep them in place
same here, gr8 video.
I am a mechanical eng., this is an excellent video to understand heat exchangers
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
mannising2@gmail.com
#7209726970 #8987583673
@soulfultenor : This is a bundle for a Caterpillar Marine Engine to replace Cat bundle Part No: 293-0009 (Old number 8L5351) used on a D399 or 3512.
@DDDelgado nice to see a comment of a chemical engineer......i m a student of chemical engineering :)
awesome!
If you use Cooper Fins to made it performance will be better.
Weld free header is very good option. congratulations for your company.
They are rolled with an expander. The drill is an electric roll motor and it is connected to a controller that measures amperage draw. The controller is set to reverse at the correct expansion. The correct expansion is 4 to 5% wall reduction. The technician measures the ID of the tube sheet, the OD of the tube, the ID of the tube and the wall thickness of the tube. Then does simple math to calculate what the ID should be after expansion. Set controller to reverse at that ID thru trial and era.
Crosstheriver
Even we can calculate by simple formula
formula =
[% of thinning x (2 x Average thk of tube)+ Average tube hole size - 2x
Average thk of tube]
that's very good
Nice work, good vid.
I wish they showed the sweat soldering of the end plate manifold.
Chris Brown They're roller expanded on each end .
Impressive.
@engineerdr These are baffles, their function is to lengthen the path of water flow between tubes. It also makes the flow more turbulent by passing the water perpendicularily to the tubes, creating vortices. This is a shell and tube HE without the shell. A full plate would block the flow.
shogoonn
Yes it increases heat transfer efficiencies
This look like an inter cooler found in multi stage compressors' for minimizing work of compression.It do the job of heat exchange also..,
I've never seen anything like this before, it seems huge. Where will this typically be used?
How much for this? will you be able to deliver this to Florida?
That was a really small heat exchanger. What kind of service was it going to be used for?
helpful video thanks, i wanna know how much the clearance should be between the shell and baffle plate for a large diameter of a shell?
tuha mohammed
Normally it is 3mm upto 500 mm dia shell
Seems that 'Plate heat exchangers' can offer better heat transfer and can be seriously up sized in situ if process demands change...
Going to replace one a little bigger than that in one of our buildings next week. Alot of work and materials go into them now wonder they cost so much.
weedandwine I love they been a heat exchanger engineer since the age 15
Did the machinists jam out the soundtrack in their down time from work?
What is the name of this device on a drilling machine? Would it work with steal plate
y the holed half plates are placed instead of using holed complete plates in between the tubes???
@JADEKINGsRULE dude... like ... I mean... like dude... dude... wtf... dude! Yeah, keep knocking engineers. You're really impressing people with *your* display of intelligence.
no matter about the size if the correct expander is used at the right speed and the hole is drilled the correct size compaired to the tube it will be good for 10 bar easy but dont use hard tempered tube cause it will crack !!
How much pressure could this handle
GreenhornVegan
Pressure rating depends on design
Normally it is 200 bar to 300 bar range /
I.e. 10kg/cm2 to 21kg/cm2
what is the name of the pipe press hole?
@Crosstheriver, ok
I attest that this is a heat exchanger for steam ?
any other building heat exchanger video's sir
what is the normal number of tubes used?
It depends of how much heat you want to exchange.. Its a project parameter.
Usually its known the fluids. For the primal fluid, the one you want to cool or heat, is known the initial and final temperatures and for exchange fluid (usually water) is known the initial temperature. From a energy balance you will be able to find the final temperature and how much heat was exchanged. You also need to know the flow conditions and they properties as Re, Pr, u and Nud. You should know the flow rate of the primal fluid and estimate the needing exchange fluid flow rate.
Using heat exchange knowledge, you will be able to find the total length needed for the tube.
Knowing the length, and using standards cooper diameters you can decide the diameter and length of the shell based in your real conditions (space).
wow... what that would cost these days... nice work
dekonfrost7 proberly around £7,000 I'm a heat exchanger engineer myself
Brother, you gotta drop these videos. They keep showing up in my recommended and I think you dropped a new video…. LOFL
What is that tool called?
what kind of bit is that on the drill ?
Ko pravi zemne sakupljace temperature
We can use four flute core drill after piloting
fuck, thats the easy part. the shells are wherreall the work goes. stuffing the bundles in the shells is cake.
Turner ya feater ke liye koi job hai to bataen
Hi which expander tool you are using?
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
how come u guys don't crimp the tube on either side of baffle, is a little quicker and if u need to pull the tube u can drive a rod down the tube and round it out and revmove the tube...
OLEGRAYRED
It is possible in case copper tubes used , but sometimes MOC of
Copper tubes as tie rod
But sometimes we use Carbon shell or Ss tie rod , in that case crimping is not possible
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970 mannising2@gmail.com
Jim
info please
What is he doing at 1:20?
he making thread so he can screw it :P
He is using an expander to tighten the tube in the tube sheet.
+rafael pitta Its some really kinky shit I tell you, trust me you don't want know.
Hlo sir condenser heat exchanger oil cooler tube replesment ka kaam hoga to cl kijiyega all tolls ND man power available Hai mere pass cl me 7209726970
@engineerdr he prolly is a student too, engineering students usually call themselves as engineers =P
I`m a mechanical Engineering student xD
Well what are you doing now? How did school turn out?
@@eletor not good, been unemployed for years now
@shoesftw so... were gonna be hearing it the whole time..? fuckkk
I am machine turner
@shoesftw 70's porn music !
too small
ups sorry bad spelling
- its "no wonder they cost..." sigh....a foreigner teaching a native speaker their own language. /facepalm
So many problems with this video, especially code violations.