Line Heater sizing

[JOCHE]

I am fairly new at sizing line heaters. I am trying to understand why when I keep increasing oil in the inlet, the duty in Quicksize goes down to negative, and in some other process software, the duty does down (as expected since oil retains heat) but then goes higher (as I add much more oil) than if the line heater only had gas.

15 MMSCFD gas
2050 bbl/day oil
850 psig....no pressure drop
60 F inlet to 125 F outlet

 

[sheiko]

What is a "line heater"? Is this a new piece of equipment or do you simply mean a "heater"?

What are the hot fluid? its state? the cold fluid? its state? hot fluid inlet/outlet temperature? cold fluid inlet/outlet temperature?

Plus, what are you increasing? oil FLOWRATE?

"We don't believe things because they are true, things are true because we believe them."

 

[dcasto]

look carefully at all the numbers under temperatures. You have to kill the preheater section by having its outlet temp the same as the inlet temp of 60F.