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1. The reactor shown below is used to conduct an exothermic reaction (A=>B). There is a valve at the reactor outlet that can be used to divert some of the exit stream, in order to pre-heat the reactor inlet. There is a controller attached to the reactor, in order to maintain the reactor temperature. Based on this scenario, answer the following questions. Fi, CAi → heat exchanger CA, CB a) What is the gain between the recycle flowrate and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral b) What is the gain (+ or -) between the inlet concentration (CA) and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral c) What is the gain (+ or -) between the recycle flowrate and the reactor temperature (T)? Circle: Positive Negative Neutral d) What is the gain (+ or -) between the inlet flowrate (Fi) and the concentration of B leaving the reactor (CB)? Circle: Positive Negative Neutral e) What is the gain (+ or -) between the inlet flowrate (F) and the reactor temperature (T)? Circle: Positive Negative Neutral e) Should the valve be designed as fail-open or fail-closed? Circle: Fail-open Fail-close f) Is the control strategy shown in the diagram feedforward or feedback? Circle: Feedforward Feedback 1

1. The reactor shown below is used to conduct an exothermic reaction (A=>B). There is a valve at the reactor outlet that can be used to divert some of the exit stream, in order to pre-heat the reactor inlet. There is a controller attached to the reactor, in order to maintain the reactor temperature. Based on this scenario, answer the following questions. Fi, CAi → heat exchanger CA, CB a) What is the gain between the recycle flowrate and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral b) What is the gain (+ or -) between the inlet concentration (CA) and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral c) What is the gain (+ or -) between the recycle flowrate and the reactor temperature (T)? Circle: Positive Negative Neutral d) What is the gain (+ or -) between the inlet flowrate (Fi) and the concentration of B leaving the reactor (CB)? Circle: Positive Negative Neutral e) What is the gain (+ or -) between the inlet flowrate (F) and the reactor temperature (T)? Circle: Positive Negative Neutral e) Should the valve be designed as fail-open or fail-closed? Circle: Fail-open Fail-close f) Is the control strategy shown in the diagram feedforward or feedback? Circle: Feedforward Feedback 1

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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1. The reactor shown below is used to conduct an exothermic reaction (A=>B). There is a valve at the reactor outlet that can be used to divert some of the exit stream, in order to pre-heat the reactor inlet. There is a controller attached to the reactor, in order to maintain the reactor temperature. Based on this scenario, answer the following questions. Fi, CAi → heat exchanger CA, CB a) What is the gain between the recycle flowrate and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral b) What is the gain (+ or -) between the inlet concentration (CA) and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral c) What is the gain (+ or -) between the recycle flowrate and the reactor temperature (T)? Circle: Positive Negative Neutral d) What is the gain (+ or -) between the inlet flowrate (Fi) and the concentration of B leaving the reactor (CB)? Circle: Positive Negative Neutral e) What is the gain (+ or -) between the inlet flowrate (F) and the reactor temperature (T)? Circle: Positive Negative Neutral e) Should the valve be designed as fail-open or fail-closed? Circle: Fail-open Fail-close f) Is the control strategy shown in the diagram feedforward or feedback? Circle: Feedforward Feedback 1
Transcribed Image Text:1. The reactor shown below is used to conduct an exothermic reaction (A=>B). There is a valve at the reactor outlet that can be used to divert some of the exit stream, in order to pre-heat the reactor inlet. There is a controller attached to the reactor, in order to maintain the reactor temperature. Based on this scenario, answer the following questions. Fi, CAi → heat exchanger CA, CB a) What is the gain between the recycle flowrate and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral b) What is the gain (+ or -) between the inlet concentration (CA) and the concentration of A leaving the reactor (CA)? Circle: Positive Negative Neutral c) What is the gain (+ or -) between the recycle flowrate and the reactor temperature (T)? Circle: Positive Negative Neutral d) What is the gain (+ or -) between the inlet flowrate (Fi) and the concentration of B leaving the reactor (CB)? Circle: Positive Negative Neutral e) What is the gain (+ or -) between the inlet flowrate (F) and the reactor temperature (T)? Circle: Positive Negative Neutral e) Should the valve be designed as fail-open or fail-closed? Circle: Fail-open Fail-close f) Is the control strategy shown in the diagram feedforward or feedback? Circle: Feedforward Feedback 1
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