Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 2170507 Computer Aided Process Synthesis Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2170507 Date:18/05/2019
Subject Name:Computer Aided Process Synthesis
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.
MARKS
Q.1 (a) What is pinch point? Explain its importance to design heat exchanger network
using pinch design approach.
03
(b) Explain role of GCC in design of HEN. 04
(c) Explain the concept of threshold approach temperature and optimum approach
temperature.
07
Q.2 (a) Discuss heuristics for selection of separation methods. 03
(b) With suitable example explain the concept of breaking heat loops to reduce
number of heat exchangers in HEN.
04
(c) Explain positioning of heat engines and heat pumps relative to pinch. 07
OR
(c) Design HEN, with minimum numbers of heat exchangers that satisfy
0
min
? T = 1 0 C and hot utility MER targets of 300 kW, for three streams on hot side
of the pinch.
Stream
Tin
(?C) Tout (?C) FCp (kW/ ?C)
C1 90 190 10
H1 200 100 5
H2 150 100 4
07
Q.3 (a) Discuss vapour recompression with respect to heat integrated distillation column. 03
(b) Briefly describe design approaches toward safe chemical plants. 04
(c) A mixture of four alcohols labeled as A, B, C, and D with flows in the feed of
1.05, 0.5, 1.2 and 7 mol/s respectively, for a total 9.75 mol/s and relative volatiles
are 3.4, 2.5, 2 and 1 respectively. The information about marginal vapor flows
estimated for non-key species are as under, Find the best distillation based
separation sequence. Calculate number of possible sequence to separate four
components and Draw direct and indirect sequences for same.
A B C D
A/B -- -- 2.53 3.59
B/C 3.11 -- -- 5.6
C/D 1.88 1.25 -- --
07
OR
Q.3 (a) Explain separation sequencing for Solid-Fluid systems. 03
(b) Discuss the ethics of chemical engineer. 04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2170507 Date:18/05/2019
Subject Name:Computer Aided Process Synthesis
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.
MARKS
Q.1 (a) What is pinch point? Explain its importance to design heat exchanger network
using pinch design approach.
03
(b) Explain role of GCC in design of HEN. 04
(c) Explain the concept of threshold approach temperature and optimum approach
temperature.
07
Q.2 (a) Discuss heuristics for selection of separation methods. 03
(b) With suitable example explain the concept of breaking heat loops to reduce
number of heat exchangers in HEN.
04
(c) Explain positioning of heat engines and heat pumps relative to pinch. 07
OR
(c) Design HEN, with minimum numbers of heat exchangers that satisfy
0
min
? T = 1 0 C and hot utility MER targets of 300 kW, for three streams on hot side
of the pinch.
Stream
Tin
(?C) Tout (?C) FCp (kW/ ?C)
C1 90 190 10
H1 200 100 5
H2 150 100 4
07
Q.3 (a) Discuss vapour recompression with respect to heat integrated distillation column. 03
(b) Briefly describe design approaches toward safe chemical plants. 04
(c) A mixture of four alcohols labeled as A, B, C, and D with flows in the feed of
1.05, 0.5, 1.2 and 7 mol/s respectively, for a total 9.75 mol/s and relative volatiles
are 3.4, 2.5, 2 and 1 respectively. The information about marginal vapor flows
estimated for non-key species are as under, Find the best distillation based
separation sequence. Calculate number of possible sequence to separate four
components and Draw direct and indirect sequences for same.
A B C D
A/B -- -- 2.53 3.59
B/C 3.11 -- -- 5.6
C/D 1.88 1.25 -- --
07
OR
Q.3 (a) Explain separation sequencing for Solid-Fluid systems. 03
(b) Discuss the ethics of chemical engineer. 04
2
(c) Use the marginal vapor rate (MV) method to determine a sequence for the
separation of alcohol mixture. Give rank to various sequences. Calculate no, of
possible sequence for five components.
Sep. MV Sep. MV Sep. MV Sep. MV Sep. MV
A/BCDE 12.3 ABC/DE 10.4 B/CDE 13.2 BCD/E 2.8 A/B 0
AB/CD 14 C/DE 6.7 B/CD 9.5 A/BC 2.6 B/C 0
AB/CDE 18.3 ABCD/E 4.3 BC/DE 8.2 A/BCD 9.1 C/D 0
ABC/D 3.6 CD/E 2.1 BC/D 1.3 AB/C 5.5 D/E 0
07
Q.4 (a) Discuss the residue curve map. 03
(b) Differentiate Flow shop plant and Job shop plant. 04
(c) Explain the step wise procedure for construction of attainable region. 07
OR
Q.4 (a) List the environmental factors to be considered in process design. 03
(b) Explain the concept of reboiler flashing and vapor recompression in distillation
configuration.
04
(c) List out various methods to calculate MER targets. Explain any one in detail with
suitable example.
07
Q.5 (a) Define with example : Cycle time, Make span, Flow shop plant. 03
(b) Explain transshipment model for stream matching. 04
(c) Explain algorithm for establishing distillation column pressure and condenser
type.
07
OR
Q.5 (a) Discuss role of computers in Process Design. 03
(b) Discuss on types of plants in multiple product batch plants. 04
(c) Discuss reactor designs used for handling large adiabatic changes in temperature. 07
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This post was last modified on 20 February 2020