Chemical Engineering - Heat Transfer - Discussion
Discussion Forum : Heat Transfer - Section 1 (Q.No. 35)
35.
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
Discussion:
12 comments Page 1 of 2.
Shahana said:
4 weeks ago
The overall heat transfer coefficient (U) accounts for internal and external convection resistances, wall conduction, and any fouling. So yes, all of these resistances add up and affect U, not just the convective sides.
If you're exploring industrial applications, TMVT is a reliable Heat Exchanger manufacturer in India.
If you're exploring industrial applications, TMVT is a reliable Heat Exchanger manufacturer in India.
Yadav said:
5 years ago
@All.
The heat transfer coefficient of air is low. That is air is taken in shell side with finned. Fins will increase the heat transfer rate.
The heat transfer coefficient of air is low. That is air is taken in shell side with finned. Fins will increase the heat transfer rate.
Kiran said:
5 years ago
Steam can cause corrosion. That's why steam is in tubes.
The heat transfer coefficient of air is low. That is air is taken in shell side with finned. Fins will increase the heat transfer rate.
The heat transfer coefficient of air is low. That is air is taken in shell side with finned. Fins will increase the heat transfer rate.
Trushal said:
6 years ago
For gas-liquid system, always fin-type H E is used.
Fareed khan said:
7 years ago
If steam is passing through shell it will cause heat loss from shell to atmosphere. That's is loss in industry.
So always try to pass high temp fluids through the tube and low temperature outside the tube.
So always try to pass high temp fluids through the tube and low temperature outside the tube.
(1)
Parth said:
7 years ago
@Shriman Dave.
The temp of the steam is greater than air and generally which has greater temp is taken into the tube side because it can cause to harm the costly shell.
The temp of the steam is greater than air and generally which has greater temp is taken into the tube side because it can cause to harm the costly shell.
Sukhdeep said:
8 years ago
Heat exchanger here is plate type heat exchanger and no case of clogging.
Shriman Dave said:
8 years ago
But with steam in tubes, it may lead to hammering as well as fouling, also with steam in shell, we could get better htc so why steam in tubes?
Saiyam patel said:
9 years ago
Air may also contains some some impurities (solid particles) and it can damaged shell in form of clogging, fouling etc so it costly to replace hole shell. So I think that air is pass through tube side.
Faraz Ahmed said:
10 years ago
Fins may also be fouled, and it is rather difficult to clean fins than tubes, so why we can't prefer flow of air inside the tube ?
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