Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 5th Sem Old 151906 Conventional Power Engineering Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ? V(OLD) EXAMINATION ? SUMMER 2019
Subject Code:151906 Date:10/06/2019
Subject Name:Conventional Power Engineering
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) Draw the neat sketch of Layout of steam power plant. Explain the main circuits
of steam power plant.
07
(b) Describe with a neat sketch the construction and working of a Francis turbine. 07
Q.2 (a) Derive the equation of efficiency of Ideal Brayton cycle of gas turbine. 07
(b) Explain the different factors to be considered for site selection of steam power
plant.
07
OR
(b) A steam power plant is supplied with dry saturated steam at a pressure of 12 bar
and exhausts into a condenser at 0.1 bar. Calculate the Rankine cycle efficiency.
At 12 bar:hf =798.4 kJ/kg hfg =1984.3kJ/kg sf=2.215 kJ/kg-K sfg =4.304kJ/kg-K
At 0.1bar:hf =191.8kJ/kg hfg =2393kJ/kg sf=0.649 kJ/kg-K sfg =7.502kJ/kg-K
07
Q.3 (a) What is the compounding of steam turbine? Why is it necessary? State the
different types of compounding of Impulse turbine.
07
(b) Explain the working of Pressurized water reactor with neat sketch. 07
OR
Q.3 (a) Explain the governing of Pelton wheel with neat sketch. 07
(b) Classify the steam turbine. 07
Q.4 (a) In a De-lavel turbine, the steam enters through a nozzle with a velocity of 500
m/s and at an angle of 20
o
to the direction of motion of the blade. The blade speed
id 200m/s and the exit angle of the moving blade is 25
o
. Find the inlet angle of
the moving blade, exit velocity of steam and its direction and work done for 10
kg of steam.
07
(b) State the advantages and disadvantages of Diesel Power Plant. 07
OR
Q.4 (a) A simple closed cycle gas turbine plant gets air at 1 bar and 15
o
C, and compresses
it to 5 bar and then heats it to 800
o
C in heating chamber. The hot air expands in
a turbine back to 1 bar. Find the power produced per kg of air supplied per second.
Take CP for the air as 1 kJ/kgK.
07
(b) Explain in details about the different cost associated with power plant. 07
Q.5 (a) Explain working of the open cycle gas turbine with intercooling with the help of
line sketch diagram.
07
(b) Why engine cooling is required? State the types of engine cooling system. 07
OR
Q.5 (a) Describe the function of different components of Nuclear reactor. 07
(b) Define (1) Demand factor (2) Diversity factor (3) Plant capacity factor (4) Load
factor (5) Peak load (6) Average load (7) Plant use factor.
07
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This post was last modified on 20 February 2020