Gas in Shell side.

[Bero91]

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 .

 

[srfish]

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.

 

[Bero91]

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

 

[EmmanuelTop]

"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

 

[EnergyMix]

You might find pursuing the free-to-download Wolverine "Heat Transfer Databook," found at

http://www.wlv.com/heat-transfer-databook,

helpful.

Want to know the do's and don'ts of Eng-Tips? Read FAQ731-376.
English not your native language? Looking for some help in getting your question across to others or understanding their answers? Go to forum1529.

 

[EmmanuelTop]

See attached file

Dejan IVANOVIC
Process Engineer, MSChE