Introduction to Process Control
•We assume that its mass flow rate w1 is constant, but the mass fraction of A, x1, varies with time. •Stream 2 consists of pure A and thus x2 = 1. •The mass flow rate of Stream 2, w2, can be manipulated using a control valve. •The mass fraction of A in the exit stream is denoted by x and the desired value (set point) by Xsp.
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