GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Subject Name: Computer Aided Process Synthesis
Time: 10:30 AM TO 01:00 PM Total Marks: 70
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018
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Subject Code: 2170507 Date: 03/12/2018Subject Name: Computer Aided Process Synthesis
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | ||
| Q.1 (a) | Calculate the number of possible sequences for separation by ordinary distillation for 7, 8 and 10 number of products. | 03 |
| (b) | Explain the ethical role of engineer in design of process. | 04 |
| (c) | Determine the minimum utility target for following stream data : Take AT min=10 °C | 07 |
| stream | Tin (K) | Tout (K) | mCp (KW/K) |
| H1 | 650 | 370 | 10 |
| H2 | 590 | 370 | 20 |
| Cl | 410 | 650 | 15 |
| C2 | 353 | 500 | 13 |
| Q.2 (a) | Define : Minimum approach temperature, Threshold approach temperature, Optimum approach temperature. | 03 |
| (b) | Explain the generalized rules for stream splitting on both sides of the pinch to satisfy MER requirements. | 04 |
| (c) | Explain the step wise procedure for construction of attainable region. | 07 |
OR
| (c) | Derive the equation to construct attainable region for steam reforming of methane. Consider following reactions dominate in process. CH4 + 2H20 <> CO; + 4H2,,'CH4 + H2O <+> CO + 3H>, --- Content provided by FirstRanker.com --- CO +H20 < COz + Hs | 07 |
| Q.3 (a) | Compare flowshop plant-and jobshop plant. | 03 |
| (b) | Describe any four‘environmental factors to be considered in process design. | 04 |
| (c) | Define overlapping and non overlapping operation and show by any suitable example that overlapping operation is more efficient. | 07 |
OR
| Q.3 (a) | Compare various transfer policies. | 03 |
| (b) | Draw the algorithm of Detailed Process Synthesis-Algorithmic Methods. | 04 |
| (c) | Calculate the cycle time using following processing time data for ZW, NIS and UIS: | 07 |
| product | Stage 1 | Stage 2 | Stage 3 |
| A | 6 | 4 | 3 |
| B | 3 | 2 | 2 |
| Q.4 (a) | Explain node and saddle point in residue curve map. | 03 |
:‘Take AT min= 10°C, Hot pinch = 90 °C, Qhu= 80 KW
| (¢) | Explain the positioning of heat pump with reference to pinch temperature. | 07 |
OR
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| Q4 (a) | Derive the equation for construction of residue curve. | 03 |
| (b) | Design heat exchanger network on cold side of pinch for following :Take AT min= 10°C, Hot pinch =90 °C, Qcu= 50 KW | 04 |
| stream | Tin °C | Tout °C | mCp (KW/°C) |
| H1 | 180 | 60 | 3 |
| H2 | 150 | 30 | 1 |
| Cl | 30 | 135 | 2 |
| C2 | 80 | 140 | 5 |
| (¢) | Explain the heat integration in distillation column using heat pumping, vapor recompression and Reboiler flashing. | 07 |
| Q.5 (a) | Draw the superstructure for one cold stream and two hot streams. | 03 |
| (b) | Explain GCC briefly. | 04 |
| (¢) | Draw the complex and thermally coupled distillation column configurations for ternary distillation. | 07 |
OR
| Q.5 (a) | Draw the superstructure for one hot stream and two cold streams. | 03 |
| (b) | Compare condensed transshipment model and expanded transshipment model. | 04 |
| (¢) | Draw the possible sequences for .3 number of products and explain heuristics for determining favorable sequences. | 07 |
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