3 replies to this topic

[a12344321]

"Steam Jacket Agitated Vessel" to heat up "mineral oil"

 

We need to find out the heating time for this mineral oil.

 

We are going to use "ln (T1 − t1)/(T1 − t2) = UAθ/Mc" to calculate. But the "Overall HTC U" from "Table 11-7, Perry's Chemical Engineers' Handbook" is actually a range rather than a certain value.

 

The question is:

 

As the vessel is going to be newly designed, is there any way to specify U as a certain value rather than a range? Or can we just ask vessel supplier to provide the U value to us? Thanks

[aroon]

You should ask to supplier.

 

The reason behind this is, U is based on several parameters and properties of process fluid as well as steam. Mainly, how vessel is design to maintain inside temperature. Properties such as fluid viscosity, thermal conductivity, density, specific heats are essentially playing very important role while design of jacketed vessel design.

 

Hope this is helpful for you.

 

Regards,

Aroon

[a12344321]

Thanks Aroon.

 

It is helpful.  Will try to contact the supplier to find out U

[breizh]

http://www.engineeri...l/transfer.html

 

Just for reference !

Calculation to be performed based on information supplied by oil supplier (fluid properties)  .

 

http://www.thermoped...7/?tid=110&sn=5

 

Hope this helps

 

Breizh

Edited by breizh, 12 March 2014 - 09:24 PM.