answer question c,d

Q1. Analyze the following industrial processes from process control viewpoint by identifying the (i) control objective, (ii) control, manipulated, and disturbance variables, (iii) operating characteristics (i.e. whether it is batch, semibatch or continuous process), (iv) control structure (i.e. feedback and feedforward control). [CLO1] Combustion Impure Reactants products blood Cooling medium Products Process Cracked Dialysis fluid products medium Cooling Crude medium oil Fuel Coolant Purified out blood (a) Heat (b) Jacketed (e) Cracking (d) Kidney exchanger Chemical reactor furnace dialysis unit Human patient 32 Combustion products Cracked products (c) Thermal cracking furnace: Crude oil is broken down ("cracked") into a number of lighter petroleum fractions by the heat transferred from a burning fuel/air mixture. The furnace temperature and amount of excess air in the flue gas can be controlled by manipulating the fuel flow rate and the fuel/air ratio. The crude oil composition and the heating quality of the fuel are common disturbance variables. Crude oil Fuel Impure blood (d) Kidney dialysis unit: This medical equipment is used to remove waste products from the blood of human patients whose own kidneys are failing or have failed. The blood flow rate is maintained by a pump, and ambient conditions," such as temperature in the unit, are controlled by adjusting a flow rate. The dialysis is continued long enough to reduce waste concentrations to acceptable levels. Human patient Dialysis medium Purified blood