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These data are given: w = 250 Ib/min; density = 62.5 lb/ft3;V1 = 4 ft³;V½ = 5 ft3,V3 = 6 ft3; Cp = 1 Btu/(lb-°F). A change of 1 psi from the controller changes the flow rate of heat q by 500 Btu/min. The temperature of the inlet stream may vary. There is no lag in the measuring element. Forkc = 3 psi/°F and ?D = 0.5 min, find the offset for a unit-step change in temperature.

These data are given: w = 250 Ib/min; density = 62.5 lb/ft3;V1 = 4 ft³;V½ = 5 ft3,V3 = 6 ft3; Cp = 1 Btu/(lb-°F). A change of 1 psi from the controller changes the flow rate of heat q by 500 Btu/min. The temperature of the inlet stream may vary. There is no lag in the measuring element. Forkc = 3 psi/°F and ?D = 0.5 min, find the offset for a unit-step change in temperature.

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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The thermal system shown is controlled by a PD controller: PD controller Final control element psi °F These data are given: w = 250 Ib/min; density = 62.5 lb/ft3;1 = 4 ft3,V2 = 5 ft3,V3 = 6 ft3; Cp = 1 Btu/(lb-°F). A change of 1 psi from the controller changes the flow rate of heat q by 500 Btu/min. The temperature of the inlet stream may vary. There is no lag in the measuring element. Forkc = 3 psi/°F and?p = 0.5 min, find the offset for a unit-step change in temperature. This is one out of five questions on the same controlled process. A) 0.8571 0.7143 c) 0.1429 (D) 0.5714 Las
Transcribed Image Text:The thermal system shown is controlled by a PD controller: PD controller Final control element psi °F These data are given: w = 250 Ib/min; density = 62.5 lb/ft3;1 = 4 ft3,V2 = 5 ft3,V3 = 6 ft3; Cp = 1 Btu/(lb-°F). A change of 1 psi from the controller changes the flow rate of heat q by 500 Btu/min. The temperature of the inlet stream may vary. There is no lag in the measuring element. Forkc = 3 psi/°F and?p = 0.5 min, find the offset for a unit-step change in temperature. This is one out of five questions on the same controlled process. A) 0.8571 0.7143 c) 0.1429 (D) 0.5714 Las
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