Question

As a process engineer with the Complex Pole Corporation, you are assigned a unit with an exothermic chemical reactor, In order to learn more about the dynamics of the process, you decide to make a step change in the input variable, the coolant temperature, from 10 °C to 15 C. Assume that the reactor was operating initially at steady state. You obtain the following plot (FIGURE Q2) for the output variable, which is the reactor temperature. 290 285 280 275 270 265 260 255 250 245 100 80 60 40 20 Time, minutes FIGURE Q2 Determine the following parameters with appropriate units: process (a) gain, time constant, damping coefficient, decay ratio and period of oscillation. (15 marks) Write the second-order transfer function of the process. (b) (2 marks) Solve for the time-domain response of a first-order transfer function, to a unit step input change. c) G(s) 2s+1 = (8 marks Reactor temprature °C

Answer 1

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