4 replies to this topic

[rasprocess]

Hi

 

I am looking for criteria for shell side fluid velocity. there are criteria for tube side velocity in several references , but I have not found any criteria for checking shell side velocity in exchanger datasheets.

I will appreciate you if you give me some help

 

sincerely yours

[breizh]

http://www.chemstati...cles/shell.pdfs

 

consider this resource to support .

Srfish , our expert or other members should  support your query.

.

Breizh

[PingPong]

In heat transfer there is a simple rule: the higher the velocity the better the heat transfer coefficient.

 

However:

 

- the maximum allowable shell side velocity is set by tube vibration limitation.

 

- moreover: the maximum shell side pressure drop that you allow also limits the allowable shell side velocity.

[srfish]

PingPong is right. "The maximum allowable shell side velocity is set by tube vibration limitation". Good software will alert you to a shell side velocity problem. HTRI has a whole chapter on this subject. The solution to a vibartion problem depends on whether this is an existing heat exchanger or an analysis of a thermal design. A short discussion of vibration can be found in pages 140-144 of "Heat Transfer in Process Engineering" by Cao.

[Chinmoy_ChE]

Hi

 

I am looking for criteria for shell side fluid velocity. there are criteria for tube side velocity in several references , but I have not found any criteria for checking shell side velocity in exchanger datasheets.

I will appreciate you if you give me some help

 

sincerely yours

I had the opportunity to be in one of the Xist training session. One of the trainee asked the same question about shell side velocity.

 

Answer from the trainer as I remember, "It is very difficult to define velocity range for shell side fluid. The basic criteria for shell side design is to maximize B stream (Cross Flow stream). In HTRI results you can find different fraction of stream for a specific design.

 

Please go through "Effectively Design Shell-and-Tube Heat Exchangers by Rajiv Mukherjee, CHEMICAL ENGINEERING PROGRESS • FEBRUARY 1998" for more information.

Edited by Chinmoy_ChE, 24 November 2014 - 04:24 AM.