A reactor is used where the temperature and level should be maintained constant. Inflow F1 is a flow that we can manipulate with the use of a control valve. Outflow F2 is a flow that we can measure. The temperature in the reactor and the level measured. To maintain the temperature in the reactor steam is used. The steam flow could be manipulated by a control valve.

Expand your mid-term report to write a report of around 4,000 words maximum (including your mid-term report), excluding references, on:
“Analysis, design, and implementation of a suitable feedback control strategy for level and temperature control in a reactor process.”
An experiment was carried out by opening the flow F1 control valve by 10% the level in the reactor increased by 20 cm. The step change in the valve resulted in a response in the level that is 99.3% in the 20s. During the first 4 seconds, no change of the level was observed, however.
A step change in the steam valve of 10% resulted in an increase of 5ºC in the temperature in the reactor. From our experiments we assume the temperature process to be a first order plus dead time process with a dead time of 5s and a time constant of 5s.
Add the following to your mid-term report:
• Transfer functions
‒ Estimate the process transfer functions for level and temperature from the experiments given. We assume the control valves’ transfer functions to be unity.
‒ What do you expect the disturbances transfer functions to look like for both level and temperature loops? Propose suitable ones.
• Block diagram to simulate
‒ Draw the block diagram of a feedback control solution showing the variables and the transfer functions. The block diagrams should be the ones you will be simulating. You are expected to simulate a feedback control strategy for temperature and level here.
• Tuning
‒ Provide the tuning parameters of a P, PI, and PID controller using MATLAB picture() function and using one semi-empirical method.
• Simulation
‒ Provide simulation results of setpoint tracking and disturbance rejection by using P/PI/PID controllers tuned using the different tuning methods.
‒ You should discuss the stability of the proposed system.
• Fuzzy logic
‒ Discuss how in practice you can use fuzzy logic control in the case at hand.
• Hardware for implementation
Master of Engineering (Industrial Automation) 5
‒ Recommend a controller (PLC or DCS) for implementation, and discuss flexibility, availability, and cost.
• Safety
‒ Discuss a possible safety critical shutdown system. Describe the safety functions required and draw a diagram showing a suggested Safety Instrument System.
 

-F1- -Steam- -Condensate Level Temperature control -F2- Figure 1 Temperature and level control in a reactor