PRO/II-Thermodynamic Data Keyword Manual

http://www.cadfamily.com/downinfo/300574.html

Order of InputThe order of appearance of statements in the input file is significant, and the statements should always be given in the order shown in Table 1-2. Some general guidelines are discussed later in this sec-tion. More detailed descriptions of the various statements can be found in later sections.
The Thermodynamic Data Category must begin with the THER-MODYNAMIC DATA heading statement. This must be followed by the definition of one or more thermodynamic system.Each system begins with a METHOD statement that declares a method for every thermodynamic property required by the problem.

The entries on this statement activate the required property calcula-tions. Available entries include SYSTEM, KVALUE, ENTHALPY, ENTROPY, DENSITY, TRANSPORT, PHI, and HENRY. If a method is not specified for a property, that property will not be cal-culated.Most of the property methods have built-in databanks that contain the required data. When desired, the user may supply additional data or overwrite the default SimSci data by including optional property statements and data statements. The property statements (SYSTEM, KVALUE, ENTHALPY, ENTROPY, DENSITY, HENRY, TRANSPORT and PHI) can appear in any order. Each may be followed by optional data statements that supply pure com-ponent data or binary interaction data for that property.

These sub-sequent data statements must appear immediately after the property statement they affect and apply only to that property statement.The exception is that data entered after the KVALUE property state-ment serve as default values for all other properties that use the same method (as the KVALUE method). For example, using SYS-TEM=SRK selects the SRK method for computing K-values, enthalpy, entropy, and vapor density. Binary interaction parameters (Kijs) supplied for calculating K-values also act as default values when calculating enthalpy, entropy, and vapor density.