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How To Determine The Heat Transfer Coefficient

heat transfer coefficient

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#1 August

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Posted 26 June 2017 - 10:38 AM

I am looking for heat transfer coëfficiënt for the heat exchanger.

 

But from the common table, this values are normally within a very large range. for example,

water : 500-10000 w/m2.k

 

Is there an equation or something that can determine this coëfficiënt accurately?

 

Thanks in advance.



#2 srfish

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Posted 26 June 2017 - 11:29 AM

There is not a single equation that calculates the overall heat transfer equation. Check out any book on Process Heat Transfer and they show the equations to calculate this..



#3 Mahdi1980

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Posted 28 June 2017 - 01:26 AM

Hi,

Please let me know what your major is.

As Srfish said, you cannot exactly determine the heat transfer coefficient without knowing the fluids , their physical properties as well as flow rates  (velocities) and the material of tube.

There is not a simple equation. You should first calculate the Reynolds, Prandtle and Nusselt numbers to determine the convectional coefficient.


Edited by Mahdi1980, 28 June 2017 - 01:27 AM.


#4 August

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Posted 28 June 2017 - 04:42 AM

I should put my question in this way: I am looking for the equations to calculate the accurate convective heat transfer coefficient.

 

Yes, I do have all the physical properties of the fluids and process data, etc. What I need is the equations that can relate all this values and generate the specific convective heat transfer coefficient.

 

Could you please indicate which books that I can use?

 

Thanks.



#5 Mahdi1980

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Posted 28 June 2017 - 05:22 AM

You can find the equations in books like " Heat transfer, by Holman" and Perry's chemical engineers handbook ( Heat transfer chapter).



#6 breizh

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Posted 28 June 2017 - 06:11 AM

Hi ,

To start with .

hope this is going to help you.

Breizh



#7 August

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Posted 28 June 2017 - 07:38 AM

Many thanks.






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