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Rating Heat Exchanger With Turbulators


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#1 SadiqChemy

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Posted 10 November 2017 - 11:28 AM

I am trying to rate an existing heat exchanger with turbulators inside the tubes using Bell Delaware Method . How I can calculate the tubes area that has turbulators inside because in this case the velocity will increase .

 

Also, the flow rates of that existing heat exchanger is very low ( shell & tube ) . Consequently, the velocity is very low as well that why turbulators are inserted inside tube . Is there a way to design different exchanger that will eliminate using turbulators ! . The current design is AEL heat exchanger !

 

The fluids of shell and tube are ethylene glycol solution !

 

Find the detail in the attachment

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Edited by SadiqChemy, 10 November 2017 - 11:49 AM.


#2 srfish

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Posted 10 November 2017 - 03:50 PM

The least expensive type of turbulators is the twisted tape type. They are thin so there will be very little actual increase in  velocity. They are used for Reynolds numbers below 2500.



#3 SadiqChemy

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Posted 10 November 2017 - 04:28 PM

The least expensive type of turbulators is the twisted tape type. They are thin so there will be very little actual increase in  velocity. They are used for Reynolds numbers below 2500.

 

How can I calculate velocity of fluid inside the tube with twisted tape and can I avoid using it when velocity is very low ? Re is less than 200 !!



#4 srfish

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Posted 11 November 2017 - 05:27 PM

The twisted tape is very thin. I would just use the empty tube velocity. You can avoid using it at very low velocity if heat transfer does not matter,



#5 breizh

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Posted 12 November 2017 - 05:10 AM

Hi ,

Consider th edocument attached to support your work  !

Good luck,

Breizh

Attached Files






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