Question
The following data was obtained from looking at the process dynamics of a shell and tube heat exchanger. Focussing on the first order model fit:
The following data was obtained from looking at the process dynamics of a shell and tube heat exchanger.
Focussing on the first order model fit: use the following values to predict what the outlet process water temperature(ST-3) would be after 400 seconds and 1200 seconds, given a step decrease in the cold process water flow rate(SC-2) from 1.4L/min to 0.4L/min at time = 0, and if the initial temperature of ST-3 was 40C.
Process Gain(K): -0.5271
Time Constant(T1): 80.53
Dead Time(TD): 0.2899
Is this process direct or reverse acting? How can you tell?
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