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Gas in Shell side.

Gas in Shell side.

Gas in Shell side.

(OP)
Dear .
I would have a question regarding construction of the heat exchanger shell and tube .

I'm interested in the side shell if I have gas , if there are any expressions for the calculation of heat transfer coefficient , and all other necessary data ? On the way to use expressions such that the liquid does not provide a suitable result .

RE: Gas in Shell side.

There is a shell side correction factor which is different between a liquid and a gas. This correction has a value of 1.0 if the shell side has a gas that is cooling. There is an equation for a gas that is being heated. It is a function of the average temperature and the tube wall temperature. This equation can be found in the Heat Exchanger Design Handbook, Wolverine Tube Data Book and others.

RE: Gas in Shell side.

(OP)
First of all , to thank you for your response .

The budget I made the book Heat exchanger desing Handbook , however the side shell get too much velocity . Thus the excessive heat transfer coefficient . Wonder if you know roughly what the velocities in the shell and tube heat exchangers and heat transfer coefficient values ​​?

thank you

RE: Gas in Shell side.

"Typical" heat transfer coefficients (U-values) for gas in sensible heat transfer applications (no condensation) range between 200-550 W/m2.degC (GPSA Databook), and this is dependent on operating pressure of the exchanger.

Normally you are not concerned with shell side velocities but in pressure drop - unless the fluid is very abrasive.

Dejan IVANOVIC
Process Engineer, MSChE

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