Operations guide23
- 1. Sub-Flowsheet Operations 2-7 2-7 2.2.2 Parameters Tab You can view the exported sub-flowsheet variables on the Parameters tab. The Parameters tab is useful when you want to keep track of several key variables without entering the sub-flowsheet environment or adding the variables to the global DataBook. It is also useful in dealing with a sub-flowsheet as a “black box”. The user who created the sub-flowsheet can set up an appropriate Parameters tab, and another user of the sub-flowsheet can be unaware of the complexities within the sub-flowsheet. Figure 2.4 These variables display values, which have been calculated or specified by the user. If changes to the specified values are made here, the sub-flowsheet is updated accordingly. For each variable, the description, value, and units are shown. The Ignore checkbox is used to bypass the sub-flowsheet during calculations, just as with all HYSYS unit operations. These variable are actually added on the Variables tab of the property view, but are viewed in full detail on the Parameters tab.