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(3 points) Use the P&ID and the process description for the PetroSkills Distillation simulation to complete this question. The information is provided with the homework assignment files on Canvas. For reference, recall that we discussed strategies to control a distillation column in Homework 1 using this example. In distillation, the temperature of a stage is considered to correlate directly with equilibria composition. Thus, temperature measurements can be used to measure composition. Consider the following control loops in the distillation column (identified here by there controller tag). Note that the Petroskills notation for PIC includes the measurement device, so no sensors or transmitters are shown in the diagram. TIC-100 LIC-110 LIC-120 PIC-120 Note that PIC-120 is a split loop, acting on two valves simultaneously. Treat this loop as two separate loops (with separate controllers PIC-120A working on PCV-102A and PIC-120B working on PCV-120B. TIC-108 Note that TIC-108 is part of a cascade control system, to be discussed later in this course. It is providing signal to FIC-121, which acts on FCV-121. For the purpose of this exercise, assume that TIC-108 acts directly on FCV-121. For the loops described above: a. Identify the manipulated and controlled variable b. State the sign and units of the process gain c. Should the control valve be fail-open or fail-closed? Respond if there is a clear choice for safe operation. Provide your reasoning. FI 125 Vent E-120 Overhead Condenser TG 108 PCV1200 FIC 124 CWS HS-125 FG 125 TIC 108 FI + FG 120120 1 Fev 24 HS-126 CWR FG 124 FIC 121 ** FCV121 ( PIC 120 PG 120 SRV FG 121 PCV120A 7 POG 101 PDI 101 TG 107 FIC 107 TI 102 LG 120 D-120 Reflux Drum LIC 120 E-100 Feed/Bottoms Exchanger ALTI TG 105 Feed 100 100 HE P-100A balta FCV100 TG 120 TI 120 FG 100 6 AG 100 TG 100 POG 121 PDI 121 F-101 Feed Filter TG 106 TCVIOS P-100B Feed Pumps TIC 105 100 106 TI PDG POI 106 100 100 ( 105 TI 105 HS 108 5 TG 105 AJ 120 P-120A 4 AI 104 TI 104 TG 104 AG 120 FI 3 Al 103 TI 103 122 P-120B Reflux Pumps TG 103 Overhead Product N LCV120 FG 122 2 AI 102 TI 102 TG 102 1 AI 101 TI 101 101 TG 101 Steam TG 100 HS-127 T-100 Distillation Column LG 110 FG 101 TIC 100 uc 110 E-110 E Reboiler PG 110 PI 110 AILAG 110 110 FI 110 P-110A Lcv110 FG 110 PetroSkills Simulation Solutions, Inc - P-130A Condensate Pumps Condensate Pot P-110B Bottoms Pumps Distillation P&ID SIZE FSCM NO DWG NO REV 303 0 O Copyright 2020 SCALE 7772020 SHEEL1 OF 1 101 P-130B Bottoms Product DistillationLsn2_IntroductionP&ID PetroSkills - Simulation Solutions