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Individual Assignment Topic 3 HAZAN Calculation Question 1 A boiler system for the distillation column uses a control valve, flow controller and a pressure controller. Given the following data and assuming that they are related in series Determine the overall failure rate, the reliability and the MTBF for this system. Assume a 1-yr period. Component Failure Rate u (Faults/yr) Control Valve 0.35 Flow Controller 0.15 Pressure Controller 0.25 Individual Assignment Topic 3 HAZAN Calculation Question 2 T1 1) The amount of chilling agent flowing into the chilling coils is controlled by the integrated temperature control system which consists of a pump (P1), control valves (V-1 and V-2), controller (C1) and temperature sensor (T1). V-1 Chilling Coils V-2 2) T1 monitors the temperature of the ice cream mixture in the tank and sends the data to C1. C1 interprets this data and adjusts the valve opening of V-1 and pump rate of P1 accordingly. V-2 serves as a back-up for V-1 and is activated when V-1 fails. P1 Ice Cream Mixing Tank Individual Assignment Topic 3 HAZAN Calculation T1 3) Given the data in Table 1 and assuming a period of 1 year, calculate the Doverall failure rate of the integrated temperature control system. V-1 Chilling Coils Equipment Failure Rate, fault year V-2 0.04 P1 Ice Cream Mixing Tank 0.60 Pump (P1) Control Vale (V-1, V-2) Controller (C1) Temperature Sensor (T1) 0.02 0.03 Table 1 Given Equation R = e-ut P = 1-R 1 MTBF n Parallel: P. = 1 P; = (Px) * (P) X ....X (P.) X i = 1 n Series: R. = 1 R; = (R4) > (R) X.....X (Rn) = i = 1