Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem Old 180506 Chemical System Modeling Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER?VIII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: 180506 Date:15/11/2017
Subject Name: Chemical System Modeling
Time: 02.30 PM TO 05.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Derive concentration profile model for a fixed bed catalytic
reactor. With usual notation enumerate all assumption
clearly.
Note: Develop concentration profile equation for non-
isothermal System.
07
(b) Derive temperature profile model for a fixed bed catalytic
reactor. With usual notation enumerate all assumption
clearly.
Note: Develop temperature profile for adiabatic operation.
07
Q.2
(a)
Derive the Continuity equation.
07
(b) Discuss about Model Development Procesure &
Deterministic Versus Stochastic Process.
07
OR
(b) What are the various model formulation principles? 07
Q.3 (a) What is modeling? Classify it based on different category and
group of models.
07
(b) Calculate the fraction of solute that could be extracted in a
single stage solvent extraction using numerical values of
S=10R, m=1/8 and c=0.15kg/m3. Derive the relation used.
07
OR
Q.3 (a) List Steps for formulation of a mathematical model. List
types of Boundary conditions.
07
(b) For a continuous solvent extraction by ?N ? Stages at steady
state, derive Kremsor Brown equation.
07
Q.4 (a) Derive model for Counter current Cooling of Tanks.
07
(b) Develop a model for temperature profile along a tabular gas
pre-heater when gas of temperature of To
0
C is heated
through a pipe held at temperature Tw
0
C.
Assume feat velocity profile and heat transfer coefficient
along the flux is given by
h=c?x
When x is distance from tube inlet and c is a constant.
Also solve model assuming axial condition to be negligible.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER?VIII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: 180506 Date:15/11/2017
Subject Name: Chemical System Modeling
Time: 02.30 PM TO 05.00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Derive concentration profile model for a fixed bed catalytic
reactor. With usual notation enumerate all assumption
clearly.
Note: Develop concentration profile equation for non-
isothermal System.
07
(b) Derive temperature profile model for a fixed bed catalytic
reactor. With usual notation enumerate all assumption
clearly.
Note: Develop temperature profile for adiabatic operation.
07
Q.2
(a)
Derive the Continuity equation.
07
(b) Discuss about Model Development Procesure &
Deterministic Versus Stochastic Process.
07
OR
(b) What are the various model formulation principles? 07
Q.3 (a) What is modeling? Classify it based on different category and
group of models.
07
(b) Calculate the fraction of solute that could be extracted in a
single stage solvent extraction using numerical values of
S=10R, m=1/8 and c=0.15kg/m3. Derive the relation used.
07
OR
Q.3 (a) List Steps for formulation of a mathematical model. List
types of Boundary conditions.
07
(b) For a continuous solvent extraction by ?N ? Stages at steady
state, derive Kremsor Brown equation.
07
Q.4 (a) Derive model for Counter current Cooling of Tanks.
07
(b) Develop a model for temperature profile along a tabular gas
pre-heater when gas of temperature of To
0
C is heated
through a pipe held at temperature Tw
0
C.
Assume feat velocity profile and heat transfer coefficient
along the flux is given by
h=c?x
When x is distance from tube inlet and c is a constant.
Also solve model assuming axial condition to be negligible.
07
2
OR
Q.4 (a) Derive model for Temperature Distribution in a
Transverse Cooling fin of Triangular Cross-Section.
07
Q.4 (b) 1000 kg/hr of fluid having density 850 kg/m
3
and specific
heat Cp=0.9 k-cal/kg
0
C is being cooled by two identical
tanks through counter current cooling system. If the pump
of cooling water trips at time ?=0. Find exit fluid
temperature from tank No. 2 after 100 min. using following
data:
Tank volume =700 liters each.
Exit temperature of fluid tank No.1=115
0
C
Exit temperature of fluid tank No.2=70
0
C
Inlet temperature of hot fluid =205
0
C
07
Q.5 (a) Pipes are joined by pair of flanges of thickness ?t? neglecting
heat loss through edges, formulate model for temperature
profile over flange surface and solve the model.
07
(b) Develop a model of Laminar flow in a narrow slit. 07
OR
Q.5 (a) Discuss about Physical modeling and Mathematical
Modeling. Discuss merits and demerits of both.
07
(b) Define: independent variable, dependent variable,
parameters.
07
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This post was last modified on 20 February 2020