/ News & Press / Video / How Shell and Tube Heat Exchangers Work (Engineering)

How Shell and Tube Heat Exchangers Work (Engineering)

WEBVTT
Kind: captions
Language: en

00:00:01.120 --> 00:00:03.260
- [Narrator] Hi, John here and welcome
00:00:03.260 --> 00:00:05.711
to another exciting and interesting video
00:00:05.711 --> 00:00:08.860
on engineering machinery.
00:00:08.860 --> 00:00:10.470
Now, in this video we're gonna be talking
00:00:10.470 --> 00:00:13.510
about the shell and tube heat exchanger.
00:00:13.510 --> 00:00:15.360
Some of you might think
you know a lot about
00:00:15.360 --> 00:00:16.830
shell and tube heat exchanges
00:00:16.830 --> 00:00:17.663
and that's fine.
00:00:17.663 --> 00:00:18.930
Then you can watch this video
00:00:18.930 --> 00:00:21.690
and it will just reinforce
what you already know.
00:00:21.690 --> 00:00:22.930
Some of you might not know anything
00:00:22.930 --> 00:00:24.368
about shell and tube heat exchanges
00:00:24.368 --> 00:00:25.710
and that's also fine
00:00:25.710 --> 00:00:28.330
because you're going to
learn a lot in this video.
00:00:28.330 --> 00:00:30.160
We're gonna look at all
of the main components
00:00:30.160 --> 00:00:32.670
that make up a shell
and tube heat exchanger.
00:00:32.670 --> 00:00:35.350
I'm gonna show you some
of its design features,
00:00:35.350 --> 00:00:37.991
its advantages and disadvantages
00:00:37.991 --> 00:00:41.480
and I'm also gonna show you how it works.
00:00:41.480 --> 00:00:43.400
So, let's get started.
00:00:43.400 --> 00:00:45.920
Now, this is not how a shell
and tube heat exchanger
00:00:45.920 --> 00:00:48.350
normally looks in the workplace.
00:00:48.350 --> 00:00:50.930
If it was, it would be a
lot easier to understand
00:00:50.930 --> 00:00:52.500
how it works.
00:00:52.500 --> 00:00:55.750
So, let's reset the
configurator tool for a moment
00:00:55.750 --> 00:00:59.230
and now you can see the
shell and tube heat exchanger
00:00:59.230 --> 00:01:02.800
as it would normally be in the workplace.
00:01:02.800 --> 00:01:04.700
There are different designs of variations
00:01:04.700 --> 00:01:07.682
but this one here is quite standard.
00:01:07.682 --> 00:01:10.800
So, let's start by looking at the outside
00:01:10.800 --> 00:01:12.820
of the heat exchanger.
00:01:12.820 --> 00:01:17.150
We've got the shell,
it's a pressure vessel
00:01:17.150 --> 00:01:20.040
which means it's gonna be pressurized
00:01:20.040 --> 00:01:22.960
to match the fluid or the system pressure
00:01:22.960 --> 00:01:24.480
that's flowing through it
00:01:24.480 --> 00:01:27.620
or specifically flowing through the shell.
00:01:27.620 --> 00:01:31.343
Sometimes people refer to the
shell also as the housing.
00:01:32.280 --> 00:01:37.280
We've also got a front and a
rear of the heat exchanger.
00:01:37.307 --> 00:01:40.740
Other than that, we've
got four main connections
00:01:40.740 --> 00:01:42.370
to the heat exchanger.
00:01:42.370 --> 00:01:47.130
One, two, three and four.
00:01:47.130 --> 00:01:50.150
We have two inlets and two outlets
00:01:50.150 --> 00:01:53.238
because we have two fluids
that are flowing into
00:01:53.238 --> 00:01:56.500
and out of the heat exchanger.
00:01:56.500 --> 00:01:57.920
This heat exchanger is called
00:01:57.920 --> 00:02:01.240
a shell and tube heat exchanger
00:02:01.240 --> 00:02:03.160
because it has a shell
00:02:03.160 --> 00:02:05.843
and because within the
shell there are some tubes.
00:02:06.760 --> 00:02:08.110
Let's take a cross-section.
00:02:10.180 --> 00:02:11.870
And we can now see
exactly what's happening
00:02:11.870 --> 00:02:14.410
inside the heat exchanger.
00:02:14.410 --> 00:02:17.120
So, we have a tube side fluid.
00:02:17.120 --> 00:02:21.863
The tube side fluid enters
here and is discharged here.
00:02:22.720 --> 00:02:24.670
We have a shell side fluid
00:02:24.670 --> 00:02:27.950
which enters here and goes a long here
00:02:27.950 --> 00:02:29.293
and it's discharged here.
00:02:30.990 --> 00:02:34.160
The reason we call the tube
side fluid the tube side fluid
00:02:34.160 --> 00:02:37.240
is because it flows through tubes.
00:02:37.240 --> 00:02:39.600
See it comes into the heat exchanger
00:02:39.600 --> 00:02:41.110
and once it enters this area,
00:02:41.110 --> 00:02:43.450
it has to flow through these tubes
00:02:43.450 --> 00:02:45.793
because it's the only place it can go.
00:02:46.920 --> 00:02:48.830
Once it flows through the tubes,
00:02:48.830 --> 00:02:50.990
it's gonna get to the
other end of the tubes.
00:02:50.990 --> 00:02:53.523
These tubes are just straight tubes.
00:02:54.400 --> 00:02:57.110
The fluid comes out on
the lower section here
00:02:58.380 --> 00:03:01.320
and re-enters in the top section here.
00:03:02.870 --> 00:03:05.010
When the tube side fluid re-enters
00:03:05.010 --> 00:03:08.160
through the top section
of these tubes here,
00:03:08.160 --> 00:03:10.650
it's gonna flow again in a straight line
00:03:10.650 --> 00:03:12.770
to the opposite end of the heat exchanger
00:03:12.770 --> 00:03:16.190
and it's gonna come out here
00:03:16.190 --> 00:03:19.923
and then gonna be discharged
or exit the heat exchanger
00:03:19.923 --> 00:03:22.060
through the outlet.
00:03:22.060 --> 00:03:26.050
That is the flow path
of the tube side fluid.
00:03:26.050 --> 00:03:30.440
The shell side fluid enters
the heat exchanger here
00:03:30.440 --> 00:03:32.510
and then it comes through
00:03:32.510 --> 00:03:35.740
and it'll pass through a series of baffles
00:03:35.740 --> 00:03:37.650
which we'll take a look at in a moment.
00:03:37.650 --> 00:03:39.810
And it's gonna be discharged
00:03:39.810 --> 00:03:43.950
through the shell side
fluid outlet down here.
00:03:43.950 --> 00:03:47.720
So, tube side fluid in on
the lower left, along here,
00:03:47.720 --> 00:03:52.720
straight flow, up, back
the other way and then out.
00:03:52.850 --> 00:03:56.244
Shell side fluid down through here,
00:03:56.244 --> 00:03:59.790
passed all the baffles and then out
00:03:59.790 --> 00:04:01.443
on the lower right-hand side.
00:04:02.820 --> 00:04:07.200
Although, I refer to fluids in this video,
00:04:07.200 --> 00:04:08.750
sometimes it's a little bit easier
00:04:08.750 --> 00:04:11.680
to think of them as flowing mediums.
00:04:11.680 --> 00:04:13.520
I say that because doctors say,
00:04:13.520 --> 00:04:15.060
you should drink a lot of fluids
00:04:15.060 --> 00:04:17.743
but realistically a
fluid can also be a gas.
00:04:18.700 --> 00:04:20.960
Let's have a look at the
tube side flowing medium
00:04:20.960 --> 00:04:22.523
in a bit more detail.
00:04:23.790 --> 00:04:24.770
What I'm actually gonna do,
00:04:24.770 --> 00:04:26.920
I'm gonna remove everything but the tubes
00:04:26.920 --> 00:04:28.933
so that we can focus on those first.
00:04:30.550 --> 00:04:33.880
So, here are our tubes.
00:04:33.880 --> 00:04:37.440
The tubes are collectively
known as a tube stack
00:04:37.440 --> 00:04:40.130
or a tube bundle.
00:04:40.130 --> 00:04:43.290
For example, the upper
half of the tube bundle
00:04:43.290 --> 00:04:47.590
would be all of the
tubes above this row here
00:04:47.590 --> 00:04:49.140
and the lower half of the tube bundle
00:04:49.140 --> 00:04:51.953
would be all of the tubes
below this row here.
00:04:52.860 --> 00:04:56.750
So, that is our tube bundle or tube stack.
00:04:56.750 --> 00:04:59.590
In order to hold the tube bundle
00:04:59.590 --> 00:05:01.570
in the correct position,
00:05:01.570 --> 00:05:06.570
we're gonna use baffles, tube
sheets and also tie rods.
00:05:06.920 --> 00:05:09.393
Let's add the tube sheets first.
00:05:11.110 --> 00:05:12.787
These are our tube sheets the tube sheets.
00:05:12.787 --> 00:05:16.090
The tube sheets are used to first,
00:05:16.090 --> 00:05:18.320
hold the tubes in position
00:05:18.320 --> 00:05:23.020
and secondly, to seal
the inside of the shell
00:05:23.020 --> 00:05:27.720
so that the shell side fluid
stays within this space
00:05:27.720 --> 00:05:30.090
between the two tube sheets.
00:05:30.090 --> 00:05:31.650
So, here's one tube sheet,
00:05:31.650 --> 00:05:33.427
sometimes known as the real tube sheet.
00:05:33.427 --> 00:05:35.480
Here's the front tube sheet
00:05:35.480 --> 00:05:40.480
and the shell side fluid is
gonna remain in this space.
00:05:41.260 --> 00:05:44.493
So, that's the pressure boundary
for the shell side fluid.
00:05:45.760 --> 00:05:48.040
We wanna fix the tubes in position
00:05:48.040 --> 00:05:50.240
using more than just two anchor points.
00:05:50.240 --> 00:05:52.433
So, we use baffles as well.
00:05:54.260 --> 00:05:57.330
And the baffles just
add some extra support
00:05:57.330 --> 00:06:00.570
to help keep the tubes in alignment.
00:06:00.570 --> 00:06:02.980
You'll also sometimes see tie rods.
00:06:02.980 --> 00:06:05.680
And the tie rods are used
to connect the tube sheets
00:06:05.680 --> 00:06:07.490
or the baffles together
00:06:07.490 --> 00:06:10.143
which again adds structural
support to the tubes.
00:06:11.330 --> 00:06:12.800
Within the tubes,
00:06:12.800 --> 00:06:14.130
what you're actually going to have
00:06:14.130 --> 00:06:18.030
are turbulators or tube inserts.
00:06:18.030 --> 00:06:19.610
You'll push the tube inserts
00:06:19.610 --> 00:06:22.970
into every one of these tube holes.
00:06:22.970 --> 00:06:25.470
So, for example we'd push
a tube insert in here
00:06:25.470 --> 00:06:26.380
or a turbulator.
00:06:26.380 --> 00:06:31.380
And that turbulator is
gonna create turbulent flow.
00:06:31.570 --> 00:06:34.120
This turbulent flow helps increase
00:06:34.120 --> 00:06:37.780
the heat transfer capacity
of the heat exchanger
00:06:37.780 --> 00:06:42.780
and also it helps us keep the
inside of the tubes clean.
00:06:42.920 --> 00:06:44.660
We reduce the likelihood of deposits
00:06:44.660 --> 00:06:46.610
building up on the inside of the tubes
00:06:46.610 --> 00:06:48.130
because we have turbulent flow
00:06:48.130 --> 00:06:49.633
rather than laminar flow.
00:06:50.750 --> 00:06:53.923
So, that's everything related
to the tube side fluid.
00:06:55.010 --> 00:06:56.530
Let's load up some parts now.
00:06:56.530 --> 00:06:58.880
So, we can have a look
at the shell side fluid.
00:07:00.176 --> 00:07:03.400
Now, we've already discussed the tubes
00:07:03.400 --> 00:07:05.223
so I think we can remove those.
00:07:07.210 --> 00:07:09.140
And we can see now
00:07:09.140 --> 00:07:11.160
with the shell side fluid.
00:07:11.160 --> 00:07:13.630
The shell side fluid is
entering through here.
00:07:13.630 --> 00:07:16.130
It's going round the baffles
00:07:16.130 --> 00:07:18.303
and then it is being discharged here.
00:07:19.300 --> 00:07:21.670
We can see that around the tubes
00:07:21.670 --> 00:07:23.560
there is space for the fluid to flow
00:07:23.560 --> 00:07:27.080
because the tubes are not all
directly next to each other.
00:07:27.080 --> 00:07:29.700
There's a bit of a gap, you can see here.
00:07:29.700 --> 00:07:32.630
If I come across, all of these gaps
00:07:32.630 --> 00:07:33.970
where my mouse is going now
00:07:33.970 --> 00:07:36.760
is where the shell side
fluid is going to flow
00:07:36.760 --> 00:07:37.953
around the tubes.
00:07:39.103 --> 00:07:41.310
We wanna have turbulent flow,
00:07:41.310 --> 00:07:43.340
the same as what we had in the tubes.
00:07:43.340 --> 00:07:46.490
And in order to get
that we use the baffles.
00:07:46.490 --> 00:07:48.610
So, the shell side fluid comes in here,
00:07:48.610 --> 00:07:52.410
flows around the tubes
because of the baffles.
00:07:52.410 --> 00:07:56.905
It will exchange heat with
the fluid within the tubes
00:07:56.905 --> 00:07:58.450
and then it's gonna drop out
00:07:58.450 --> 00:08:00.863
of the shell side fluid outlet here.
00:08:01.780 --> 00:08:04.560
Once again this turbulent flow increases
00:08:04.560 --> 00:08:07.010
00:08:07.010 --> 00:08:08.550
which makes it more efficient
00:08:08.550 --> 00:08:11.380
but also helps us prevent or reduce
00:08:11.380 --> 00:08:13.470
the likelihood of deposits building up
00:08:13.470 --> 00:08:16.113
on the outside of the tubes.
00:08:17.580 --> 00:08:20.180
Let's load up another 3D model,
00:08:20.180 --> 00:08:23.000
so I can show you a
slightly different design
00:08:23.000 --> 00:08:24.823
of a shell and tube heat exchanger.
00:08:26.450 --> 00:08:27.940
So, here is the first design
00:08:27.940 --> 00:08:28.930
that I wanna show you.
00:08:28.930 --> 00:08:31.760
It's slightly different from
what we looked at before.
00:08:31.760 --> 00:08:35.287
You can see that externally
it looks pretty much the same
00:08:35.287 --> 00:08:37.327
but if I show you the tubes
00:08:37.327 --> 00:08:39.470
and we reverse that around.
00:08:39.470 --> 00:08:41.820
You can see that the tubes themselves
00:08:41.820 --> 00:08:45.520
are no longer just straight.
00:08:45.520 --> 00:08:48.513
They're actually rounded into a u-shape.
00:08:49.500 --> 00:08:50.333
This is actually called
00:08:50.333 --> 00:08:52.810
a u-type shell and tube heat exchanger
00:08:52.810 --> 00:08:55.940
or a u-tube shell and tube heat exchanger
00:08:55.940 --> 00:08:57.400
which is slightly confusing.
00:08:57.400 --> 00:08:59.410
But anyway, you can see that the tubes
00:08:59.410 --> 00:09:01.423
have this u-shape.
00:09:02.330 --> 00:09:03.910
Let's load up a more simple design
00:09:03.910 --> 00:09:05.230
cause I just want to explain to you
00:09:05.230 --> 00:09:08.803
what a one pass and a multi
pass heat exchanger is.
00:09:09.810 --> 00:09:11.280
So, here we have a heat exchanger
00:09:11.280 --> 00:09:13.700
without a header or a bonnet.
00:09:13.700 --> 00:09:15.297
And if we take away the shell,
00:09:15.297 --> 00:09:16.563
in fact what we can do we can actually
00:09:16.563 --> 00:09:18.930
just take a cross-section.
00:09:18.930 --> 00:09:22.600
Can see that this time the tube side fluid
00:09:22.600 --> 00:09:27.490
comes in here, flows through the tubes
00:09:27.490 --> 00:09:30.633
and exits on this side here.
00:09:30.633 --> 00:09:33.700
So, in on the right out on the left.
00:09:33.700 --> 00:09:37.210
And what's interesting about
this particular heat exchanger
00:09:37.210 --> 00:09:38.960
is that the tube side fluid
00:09:38.960 --> 00:09:43.900
represents a single pass
00:09:43.900 --> 00:09:46.160
You'll often hear people
referring to heat exchangers
00:09:46.160 --> 00:09:49.410
as either single or multi pass.
00:09:49.410 --> 00:09:53.000
The shell side fluid
has a multi pass design.
00:09:53.000 --> 00:09:57.600
It's passing multiple
times over the tubes.
00:09:57.600 --> 00:10:00.970
The tube side fluid does
not have a multi pass design
00:10:00.970 --> 00:10:04.160
because it's traveling
directly through the tubes
00:10:04.160 --> 00:10:06.060
and then out.
00:10:06.060 --> 00:10:08.650
If the tube side fluid was
to come in from the right,
00:10:08.650 --> 00:10:11.170
come out on the left
and then go back around
00:10:11.170 --> 00:10:13.140
and then exit on the right,
00:10:13.140 --> 00:10:15.390
then this would be a multi pass design.
00:10:15.390 --> 00:10:17.220
Because it too, would be passing through
00:10:17.220 --> 00:10:19.853
the heat exchanger multiple times.
00:10:20.740 --> 00:10:23.220
This heat exchanger
would be described as a
00:10:23.220 --> 00:10:24.900
multi pass heat exchanger
00:10:24.900 --> 00:10:26.850
just because the shell side fluid
00:10:26.850 --> 00:10:29.400
or one of the fluids is
passing multiple times
00:10:29.400 --> 00:10:30.821
over the other fluid.
00:10:30.821 --> 00:10:33.910
If the shell side fluid
came in from the top
00:10:33.910 --> 00:10:37.410
and dropped out at the
bottom with no baffles,
00:10:37.410 --> 00:10:38.530
then the shell side fluid
00:10:38.530 --> 00:10:40.560
would have a single pass design
00:10:40.560 --> 00:10:42.290
and so with the tube side fluid.
00:10:42.290 --> 00:10:46.440
And we would say, this is a
single pass heat exchanger.
00:10:46.440 --> 00:10:47.830
That's actually quite rare though.
00:10:47.830 --> 00:10:49.220
You don't see that very often
00:10:49.220 --> 00:10:51.670
because it's not very efficient.
00:10:51.670 --> 00:10:53.750
If you have a look at
steam condenses though,
00:10:53.750 --> 00:10:56.189
you will see that design.
00:10:56.189 --> 00:10:59.830
And generally, whenever you
convert a vapor into a liquid
00:10:59.830 --> 00:11:03.240
or whenever you're changing
the state of something,
00:11:03.240 --> 00:11:06.650
you'll often use a single pass design.
00:11:06.650 --> 00:11:09.680
People also talk about
counter flow, cross flow
00:11:09.680 --> 00:11:11.340
and parallel flow.
00:11:11.340 --> 00:11:14.450
This particular design
is a counter flow design
00:11:14.450 --> 00:11:17.210
because the tube side
fluid enters on the right
00:11:17.210 --> 00:11:18.650
and exits on the left.
00:11:18.650 --> 00:11:20.947
And the shell side
fluid enters on the left
00:11:20.947 --> 00:11:24.380
and is discharged on the right.
00:11:24.380 --> 00:11:28.260
So, they're flowing in opposite
directions to one another,
00:11:28.260 --> 00:11:30.712
right to left and left to right.
00:11:30.712 --> 00:11:33.170
That is a counter flow design.
00:11:33.170 --> 00:11:36.890
It is the most efficient
type of flow design
00:11:36.890 --> 00:11:39.630
you can have for a heat exchanger.
00:11:39.630 --> 00:11:42.020
came in on the right
00:11:42.020 --> 00:11:44.204
and exited on the left
00:11:44.204 --> 00:11:46.860
then we'd have a parallel flow design
00:11:46.860 --> 00:11:48.520
because both the tube side fluid
00:11:48.520 --> 00:11:50.010
and the shell side fluid
00:11:50.010 --> 00:11:53.015
are flowing from right to left.
00:11:53.015 --> 00:11:55.550
If the shell side fluid came in at the top
00:11:55.550 --> 00:11:57.610
and which discharged
straight out of the bottom
00:11:57.610 --> 00:11:59.660
this would be a cross flow design
00:11:59.660 --> 00:12:02.980
because the fluids are
flowing at a 90 degree angle
00:12:02.980 --> 00:12:04.413
relative to each other.
00:12:06.670 --> 00:12:08.340
So, different flow designs depend on
00:12:08.340 --> 00:12:10.993
what you wanna use the heat exchanger for.
00:12:12.070 --> 00:12:12.903
Let's have a talk now
00:12:12.903 --> 00:12:15.120
about some of the
advantages and disadvantages
00:12:15.120 --> 00:12:17.873
associated with this
type of heat exchanger.
00:12:20.050 --> 00:12:22.480
When we talk about
00:12:22.480 --> 00:12:25.340
associated with the shell
and tube heat exchanger,
00:12:25.340 --> 00:12:28.570
we're often comparing it
to the plate heat exchanger
00:12:28.570 --> 00:12:30.420
because in the industrial world
00:12:30.420 --> 00:12:32.640
we're either using plate heat exchangers
00:12:32.640 --> 00:12:34.780
or shell and tube heat exchangers.
00:12:34.780 --> 00:12:37.010
Normally, there are some other designs
00:12:37.010 --> 00:12:39.150
but those two are the most dominant
00:12:39.150 --> 00:12:42.080
within the industrial engineering world.
00:12:42.080 --> 00:12:46.000
Now, shell and tube heat
exchangers are relatively cheap.
00:12:46.000 --> 00:12:47.310
They have a simple design
00:12:47.310 --> 00:12:49.800
and they're quite easy to maintain.
00:12:49.800 --> 00:12:52.930
They're also suitable for higher
pressures and temperatures
00:12:52.930 --> 00:12:55.550
compared to plate heat exchangers.
00:12:55.550 --> 00:12:58.880
The pressure drop across
00:12:58.880 --> 00:13:02.710
is less than that of a
plate heat exchanger.
00:13:02.710 --> 00:13:06.750
It's also easy to find and
isolate leaks in the tubes
00:13:06.750 --> 00:13:09.130
compared to trying to
find and isolated leak
00:13:09.130 --> 00:13:11.160
in a plate heat exchanger.
00:13:11.160 --> 00:13:13.067
Shell and tube heat
exchangers also don't foul
00:13:13.067 --> 00:13:15.790
as easily as plate heat exchangers
00:13:15.790 --> 00:13:18.200
because they don't have
the very fine clearances
00:13:18.200 --> 00:13:19.893
that a plate heat exchanger has.
00:13:21.230 --> 00:13:23.710
There are however some disadvantages.
00:13:23.710 --> 00:13:26.980
They're less efficient
than plate heat exchangers.
00:13:26.980 --> 00:13:29.020
They also require more space to open
00:13:29.020 --> 00:13:31.110
and remove the tubes.
00:13:31.110 --> 00:13:33.620
And you can't increase
the cooling capacity
00:13:33.620 --> 00:13:35.910
00:13:35.910 --> 00:13:37.310
With the plate heat exchanger,
00:13:37.310 --> 00:13:40.190
you can simply add more
plates or remove plates
00:13:40.190 --> 00:13:42.500
in order to vary the cooling capacity.
00:13:42.500 --> 00:13:44.520
With the shell and tube
type heat exchanger,
00:13:44.520 --> 00:13:45.823
this is not possible.
00:13:47.180 --> 00:13:50.040
If you wanna learn more about
shell and tube heat exchangers
00:13:50.040 --> 00:13:52.090
then I suggest you go to the website.
00:13:52.090 --> 00:13:54.363
I'll put the link in the
video description area
00:13:54.363 --> 00:13:57.920
and you can read through
one of our articles
00:13:57.920 --> 00:13:59.540
which will tell you a little bit about
00:13:59.540 --> 00:14:01.360
00:14:01.360 --> 00:14:03.060
and discuss more of the topics
00:14:03.060 --> 00:14:04.923
that we've covered in this video.
00:14:05.890 --> 00:14:08.060
If you still wanna learn even more
00:14:08.060 --> 00:14:10.100
about heat exchangers after that,
00:14:10.100 --> 00:14:13.630
then you can check some of
our other associated articles
00:14:13.630 --> 00:14:16.026
within our 3D encyclopedia.
00:14:16.026 --> 00:14:18.910
You can see here we have
an associated article
00:14:18.910 --> 00:14:21.390
for a plate heat exchanger.
00:14:21.390 --> 00:14:25.750
If you want to access some
free interactive 3D models,
00:14:25.750 --> 00:14:27.160
then go to the website
00:14:27.160 --> 00:14:31.690
and select any model
from the 3D models menu
00:14:31.690 --> 00:14:33.223
those highlighted green.
00:14:34.190 --> 00:14:35.860
And if you wanna take
your engineering knowledge
00:14:35.860 --> 00:14:36.900
to the next level,
00:14:36.900 --> 00:14:39.950
then check out some of
that online video courses.
00:14:39.950 --> 00:14:44.490
We have over 30 hours of video
courses, currently online.
00:14:44.490 --> 00:14:47.430
And they cover everything
from valves to diesel engines
00:14:47.430 --> 00:14:49.640
to pumps to heat exchangers.
00:14:49.640 --> 00:14:53.240
I've pasted a discount coupon
in the video description area
00:14:53.240 --> 00:14:55.370
so if you do decide to
purchase any courses,
00:14:55.370 --> 00:14:58.320
then be sure to use that discount coupon.
00:14:58.320 --> 00:15:00.550
If you like this video
then please do share it
00:15:00.550 --> 00:15:01.582
or like it on social media.
00:15:01.582 --> 00:15:04.789
It really does help us out
and we really appreciate it.
00:15:04.789 --> 00:15:08.123
And don't forget to subscribe
to our You Tube channel.
00:15:08.970 --> 00:15:10.670
Thank you very much for your time.

Sales phone