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