ASSESSMENT 1 (1) Compare the time response of the system for the following situations a. Step increase of 100C in the feed temperature with heat input held constant. b. Step increase of 42 kW in the...

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ASSESSMENT 1 (1) Compare the time response of the system for the following situations a. Step increase of 100C in the feed temperature with heat input held constant. b. Step increase of 42 kW in the heat input with feed temperature held constant. c. Simultaneous step increase in the feed temperature (100C) and heat input (42 kW). Marks = 40 All the three situations should be plotted in one graph so that they can be easily compared by visual inspection. The graph should be properly labelled with clear legends to indicate the various curves. (15 marks) Block diagram from Simulink should be included either in the main body or in the appendix. If it is in the appendix it should be clearly indicated in the main body of the report where the reader can find this information. (10 marks) Your observations and analysis of the results should be provided. (15 marks) (2) Compare the time response of the temperature measured by the thermocouple with the time response of the outlet temperature when the inlet temperature undergoes a step increase of 100C. The thermocouple is known to have a first order response with a time constant of 30 s. Marks = 15 Both responses (Process temperature and temperature measured by the thermocouple) are plotted in one graph so that they can be easily compared by visual inspection. The graph should be properly labelled with clear legends to indicate the various curves. (5 marks) Block diagram from Simulink should be included either in the main body or in the appendix. If it is in the appendix it should be clearly indicated in the main body of the report where the reader can find this information. (5 marks) Your observations and analysis of the results should be provided. (5 marks) (3) Construct a P&ID for this process which includes a closed feedback control system. The controller and indicators are part of a distributed control system (DCS) and are accessible in the control room. Marks = 10 P&ID should follow ISA standards. (4) For the case where only proportional control is used, compare the response with and without the controller if the proportional gain is 20 and the inlet temperature undergoes a step change of 100C. Marks = 20 Both responses should be plotted in one graph so that they can be easily compared by visual inspection. The graph should be properly labelled with clear legends to indicate the various curves. (10 marks) Block diagram from Simulink should be included either in the main body or in the appendix. If it is in the appendix it should be clearly indicated in the main body of the report where the reader can find this information. (5 marks) Your observations and analysis of the results should be provided. (5 marks) (5) Compare the open loop response with the closed loop response using a PI controller with the same proportional gain and integral times of 30, 60 and 90 s. All the cases should be plotted in one graph so that they can be easily compared by visual inspection. The graph should be properly labelled with clear legends to indicate the various curves. (15 marks) Block diagram for the closed loop system from Simulink should be included either in the main body or in the appendix. If it is in the appendix it should be clearly indicated in the main body of the report where the reader can find this information. (5 marks) Your observations and analysis of the results should be provided. (10 marks) NOTE: The report should be written in a professional manner. It should include an introduction to the assignment and a conclusion section summarising the key points. The report should be no more than 10 pages (not including figures and tables if any). While you will not be directly penalised for exceeding this number, conciseness will be a factor in the marking – so you write only what you need to in order to get your point across. ASSESSMENT 1 Due Date: Aug 15, 2018 Consider the process of heating a liquid in a stirred tank with no hold up. This is shown schematically below: The volume of liquid in the tank is 1000 litre and density of the liquid is 1 kg/litre. Your task is to study the response of the system under various conditions given below and write a report describing your observations and conclusions. Please provide the necessary figures and also the block diagram of the system which you used in Simulink to produce the results. (1) Compare the time response of the system for the following situations a. Step increase of 100C in the feed temperature with heat input held constant. b. Step increase of 42 kW in the heat input with feed temperature held constant. c. Simultaneous step increase in the feed temperature (100C) and heat input (42 kW). (2) Compare the time response of the temperature measured by the thermocouple with the time response of the outlet temperature when the inlet temperature undergoes a step increase of 100C. The thermocouple is known to have a first order response with a time constant of 30 s. (3) Construct a P&ID for this process which includes a closed feedback control system. The controller and indicators are part of a distributed control system (DCS) and are accessible in the control room. (4) For the case where only proportional control is used, compare the response with and without the controller if the proportional gain is 20 and the inlet temperature undergoes a step change of 100C. (5) Compare the open loop response with the closed loop response using a PI controller with the same proportional gain and integral times of 30, 60 and 90 s. NOTE: The report should be written in a professional manner. It should include an introduction to the assignment and a conclusion section summarising the key points.The report should be no more than 10 pages (not including figures and tables if any). While you will not be directly penalised for exceeding this number, conciseness will be a factor in the marking – so you write only what you need to in order to get your point across. Feed flowrate 200 litre/min Feed temperature 60 0 C Outlet temperature 80 0 C Steam/electric heater Temperature element Temperature transmitter/display