5 replies to this topic

[Vegeta]

Dears,

I am writing to ask you to share your thoughts with me on the job I have. We are installing a shell and tube heat exchanger to cool fuel oil product prior storage. The heat exchanger was ordered and designed with the following specifications:
Fuel oil Temperature in = 107 °C and out as 57 °C
Cooling medium: Cooling water available at 30 °C NORMALLY and can be lower than that in winter.
The problem is that the fuel oil is fed to storage tanks and those tanks can be in loading mode rather than filling i.e. there is no flow to the tanks and through the cooler but the flow is out of the tanks (the motor operated valve on the line to the tanks is closed). By that, there is a risk of over cooling of the fuel to its pour point or close to that which is a trouble in downstream long line of the cooler and fuel oil supplying pumps.
I thought of some temperature control strategies in the attachments. Can you advise which is the best? Of course, other options are welcomed for discussion.

Regards,

Attached Files

•  2.pdf   24.89KB   29 downloads
•  1.pdf   30.44KB   31 downloads

Edited by Vegeta, 28 August 2016 - 11:15 AM.

[Bobby Strain]

Neither is any good.

 

Bobby

[Vegeta]

So, what is the solution?

[Bobby Strain]

This is the kind of situation where you can apply your engineering skills. If I gave you the solution, you wouldn't learn much. Engineers solve problems like this.

 

Bobby

[Vegeta]

what about a recycle pump?!

[Bobby Strain]

You are on the right path. Recycle pump for what? Just keep the objective in focus. List as may ways as you can to achieve it. Evaluate the effectiveness of each. Then you can pick the best of them.

 

Bobby