5 replies to this topic

[krsna]

What is the significance of A, E, F Streams in HTRI

[Pilesar]

You can find a good explanation at the link below:
http://www.wlv.com/p...data/db3ch3.pdf

[himant]

Hi

 

I have a doubt regarding stream analysis.

I designed a exchanger using HTRI and it shows B flow as 0.4, C as 0.3, A as 0.2 and E as 0.1.

 

And if I block A and E streams, my heat transfer comes out to be same as case with no block flows.

 

So, will my exchanger work with lesser B flow? And what is the significance of stream analysis if my exchanger is giving desired outlet with lesser area?

 

Regards

Himant

[Pilesar]

If you are using HTRI in design mode, the heat transfer will be the same for every configuration. When you specify the inlet and outlet conditions of one of the streams, there are no degrees of freedom to adjust the overall duty. Are you running HTRI in design mode? To address your specific questions, for exchangers where the tube side coefficient greatly dominates the total thermal resistance the flow path on the shell side will not significantly affect performance -- condensers are often a good example.

[himant]

Thank you for your reply.

 

I was running HTRI in design mode. To be more clear about my case, I am attaching screenshot of my case.

I have just used water in shell and tube. Area comes out to be around 77 m2.

 

In this case, there is not dominance from shell side and tube side. Main problem is with the stream analysis and window and cross-flow velocities.

 

At this moment, I am not concerned about vibrations.

 

Regards

Himant

 

[himant]

Attached file

Attached Files

•  htri example.jpg   123.32KB   18 downloads