Which type of cascade control is better for temperature control?
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As shown in the diagram, the material enters the reaction tank to undergo reactions. During these reactions, significant heat is released; therefore, reactor R101 is equipped with a jacketed water cooling system. There are several variables that can be monitored: the temperature of the reactor, the temperature of the water returning to the jacket, the flow rate of water entering the jacket, and the flow rate of water returning from the jacket. Now, I want to use cascade PID control to stabilize the reactor temperature. Then I did some research, and there are currently two options: The first is a cascade control system using temperature and jacket water flow rate; the second is one that uses reactor temperature and return water temperature in a cascade control setup. Which one is better?
In principle, the reactor should be the better choice, as it is the first to receive the control variable, while water temperature is the second variable
The first control effect should be better than the second.