Modeling of process systems with large recycle streams

2 Modeling of process systems with large recycle streams 

Process systems with significant material recycling 

In its general form, the mathematical model describing the overall and component material balances of this process can be written as 

Note that the model explicitly identifies the terms that involve the feed and product flow rates (j = 0, N), the internal flow rates (j = 1. N — 1), and the recycle (j = R). 

In order to investigate the impact of the presence and magnitude of the recycle stream on the process dynamics, Equation (3.1) also makes use of the recycle number Rc, which we define below. 

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