Dear all,
I am working with ProII 7.1 version, after designing a column when i run the program for getting vapor liquid loadings , i am getting this error message . its an ethanol water separation column ( i have used NRTL 01 method)
1 error(s), 0 warning(s), and 0 message(s) detected:
*** error *** Unit 17, 't1' - rating / fri data calculations for tray 1 require vapor viscosity, liquid viscosity, and surface tension methods in the thermodynamic data section of input data.
Kindly help
Regards
Venki