Flowsheets and Columns

Introduction

Both of these allow for a collection of objects to be organized as a combined group, conceptually.

Flowsheets in Dynamics

In steady state column flowsheets are special because they use a different solver to solve the entire flowsheet, and certain solvers only support certain configurations. In dynamics mode, the column flowsheet is no different than any other flowsheet and unit operations in it work and solve the same way as in other flowsheets. What is special about a column flowsheet though is that the tray section, condenser and reboiler operations can only be created inside a column flowsheet. Condensers and reboilers are covered in the vessels section.

In steady state it is common to interact with the main column flowsheet, but in dynamics, it is common to interact with the individual unit operations. So in dynamics mode, a tray section must be dealt with as a unit operation, rather than part of the column.

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