Part A QUESTIONS 17 In a particular process liquid from a pr

Part A (QUESTIONS 1-7 In a particular process liquid from a previous reaction will be heated before proceeding to the next phase of reactions. A shell and tube heat exchanger has been installed for this purpose with steam providing the heat duty. A feedback controller is used to control the output temperature of the process liquid stream but the flow rate and the temperature of the input liquid stream vary too much for the feedback controller to be effective. Steam Shell and Tube Heat Heated Process Uquid What sort of controller would be appropriate in addition to the feedback controller to account for the deviations of the input liquid stream? Forwardfeed controller without a model X201 Tablet lenovo

Solution

Q1. Forward Feed control with a model- This will predict the behavior with the help of model. It react before error occurs by overcoming the dynamic change of input variable. This feature is not available in a feed back controller as it does not offer a predictive control to compensate for disturbances in the input. Ratio controller is out of question as its purpose is to maintain the ratio of any two streams getting mixed at a point observed usually in process installations.

Q2. The signal from FC1 and TC1 will be combined and sent to V1

Q3. False. The system needs a model.

Q4. Temperature sensor, Flow Transmitter

Q5. Type II Ratio Controller- This is the best suitable one for Stoichiometric mixture application

Q6. Feedback controller, Control valve, Flow controller