Process mode for the BA1 example simulation

The objective of Process mode is to provide an overall steady-state mass and energy balance for the process and to estimate the product flowrates and compositions. However, batch processes are inherently transient, and a batch distillation column achieves a steady-state solution only when its condenser is at total reflux. Therefore, the total reflux configuration is the default option in Process mode for sizing and initializing the batch distillation column for dynamics. In the total reflux configuration, the batch distillation column has no products, so Process mode provides only a conceptual design that serves as a good initial starting point for dynamic simulation. (That is, we don't produce meaningful results for analyzing the system until we run the simulation in Dynamics mode.)

The default set of specified variables includes all the variables that we need to meet the design requirements. Therefore, we do not switch any process specifications in Process mode.