6 replies to this topic

[cheminst]

Can anyone mention any reference or tell me how to calculate dimensions (mechanical design) for a u tube bundle in a heat exchanger and gas sparger/divider(a perforated pipe)

 

For example, in u tube bundle the number of tubes, distance from heat exchanger wall etc.(tube thickness and tube diameter are selected). The problem I found here is that each tube's length is different. Not the same. So how to calculate the dimensions of them?

 

and in gas sparger/divider (a perforated pipe) the diameter of pipe, hole diameter, number of holes, distance between holes etc.

 

I looked for these in many design books. But couldn't find anything satisfactory?

Edited by cheminst, 24 January 2016 - 12:23 PM.

[srfish]

Usually the OTL(outer tube limit) for the tube count  is 0.4375 to 0.50 inches. Then a minimum tube bend radius of 1.5x tube O.D. can be used.Then using the tube pitch, you can calculate the diameter of each row of tubes.

[Art Montemayor]

You have obtained some good, practical and realistic information from SRFish on the mechanical design of a U-tube bundle exchanger.

 

But you haven't looked in the right text books for this type of specific information on how the U-tube bundle is formed.  Obtain a copy of A. Kayode Coker's new text on the subject titled "Ludwig's Applied Process Design for Chemical and Petrochemical Plants", Volume 3, 4th Edition.  In Chapter 15, "Heat Transfer", you will find specific tube layouts for U-Tube bundles using different tube sizes as well as calculating the effective tube length for U-Tube heat exchangers.

 

If you are a chemical engineering student, you should buy the text and use it diligently in your course work as well as studying it in detail.  You will never regret this profitable investment in your career as a ChemE.

[cheminst]

Thank you very much to both of you for the knowledge, advice and references. Could you please mention a reference for gas sparger (as a perforated pipe) design too like I have mentioned in the post.

[Pilesar]

Search the archives of this forum for the "Knaebel sparger". This is a simple design method that is usually adequate.

[breizh]

Hi ,

About spargers , a few documents attached .

Hope this helps.

Breizh

[cheminst]

Thank you very much Pilesar and breizh. Those documents are really helpful.