Exam Details
| Subject | process heat transfer | |
| Paper | ||
| Exam / Course | diploma engineering | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | May, 2017 | |
| City, State | gujarat, ahmedabad |
Question Paper
1/2
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER -III• EXAMINATION SUMMER 2017
Subject Code: 330502 Date: 01 05 2017
Subject Name: PROCESS HEAT TRANSFER
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.
4. Use of programmable Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
Q.1
Explain types of heat exchanger based on flow arrangement (flow pattern)
07
Derive equation for heat flow for composite wall having three layers.
07
Q.2
Describe Fourier's law for conduction.
07
Derive L.M.T.D. Equation for parallel flow.
07
L.M.T.D
OR
Define convection. Explain different types of convection with example.
07
Q.3
Discuss Thermal conductivity and its variation with temperature.
07
Describe regime of pool boiling with neat diagram.
07
OR
Q.3
Explain different feeding arrangement for evaporation.
07
Explain shell and tube heat exchanger.
07
Q.4
A furnace wall made up of a steel plate 10 mm thick is lined on the inside with silica brick 160 mm thick and on the outside with magnesite brick 160 mm thick. The temperature on the inside edge of the wall is 973 K and on the outside is 280 K. calculate the quantity of heat passed watts per m2. Thermal conductivities in are 16.86, 1.75, and 5.23 respectively for steel, silica brick, and magnesite brick
07
2/2
K K W/m2
Differentiate film wise and drop wise condensation.
07
OR
Q.4
In a double pipe heat exchanger, hot fluid has temperatures of 144 0C and 80 0C.Cold fluid has temperatures of 20 0C and70 0C. Calculate L.M.T.D for
1. Parallel flow 2. Counter flow.
07
0C
Explain agitated film evaporator in detail.
07
Q.5
Define radiation. Explain emissivity and emissive power.
07
Explain Newton's law of Convective heat transfer steady state heat transfer (3)White body
07
OR
Q.5
Explain Kirchhoff's law and stefanboltzman law for radiation.
07
Define evaporator economy Absorptivity evaporator capacity
07
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING SEMESTER -III• EXAMINATION SUMMER 2017
Subject Code: 330502 Date: 01 05 2017
Subject Name: PROCESS HEAT TRANSFER
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.
4. Use of programmable Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
Q.1
Explain types of heat exchanger based on flow arrangement (flow pattern)
07
Derive equation for heat flow for composite wall having three layers.
07
Q.2
Describe Fourier's law for conduction.
07
Derive L.M.T.D. Equation for parallel flow.
07
L.M.T.D
OR
Define convection. Explain different types of convection with example.
07
Q.3
Discuss Thermal conductivity and its variation with temperature.
07
Describe regime of pool boiling with neat diagram.
07
OR
Q.3
Explain different feeding arrangement for evaporation.
07
Explain shell and tube heat exchanger.
07
Q.4
A furnace wall made up of a steel plate 10 mm thick is lined on the inside with silica brick 160 mm thick and on the outside with magnesite brick 160 mm thick. The temperature on the inside edge of the wall is 973 K and on the outside is 280 K. calculate the quantity of heat passed watts per m2. Thermal conductivities in are 16.86, 1.75, and 5.23 respectively for steel, silica brick, and magnesite brick
07
2/2
K K W/m2
Differentiate film wise and drop wise condensation.
07
OR
Q.4
In a double pipe heat exchanger, hot fluid has temperatures of 144 0C and 80 0C.Cold fluid has temperatures of 20 0C and70 0C. Calculate L.M.T.D for
1. Parallel flow 2. Counter flow.
07
0C
Explain agitated film evaporator in detail.
07
Q.5
Define radiation. Explain emissivity and emissive power.
07
Explain Newton's law of Convective heat transfer steady state heat transfer (3)White body
07
OR
Q.5
Explain Kirchhoff's law and stefanboltzman law for radiation.
07
Define evaporator economy Absorptivity evaporator capacity
07
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