Hi!
I have a question about reboiler rating.
For example,
If I ask 100 mmBtu/hr heat requirement and also to give a 20% margin in the surfcae area,
Will be the U and dT calculated based on 20% margin surface area to meet 100 MMbtu/hr?
or
Will be U and dT calculated based on 0% margin surface area to meet 100 MMbtu/hr, decide surface area and give a margin 20% on calculated value? Finally the heat duty also is able to do 120% duty.
Please confirm which case is right HTRI rating precodure.
Thanks
SooMin Park