A very simple problem: As you may know TEMA proposed some recommendation about fouling factor within his standard. Unit of these proposed values are hr.ft2.°F/BTU.
When I insert this data within HYSYS environment these software change them into SI unit.
I try to manual perform unit conversion but I colud not reach to HYSYS values.
Do you have any experince about this item.
For example for TEMA value of 0.001 hr.ft.°F/BTU, HYSYS predict 0.000176 m2.°C/W but with unit converstion I get 0.00057 m2.°C/W (Refer to attachment)