Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem Old 151906 Conventional Power Engineering Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (OLD) EXAMINATION ? WINTER 2018
Subject Code:151906 Date: 30/11/2018
Subject Name: Conventional Power Engineering
Time: 10:30 AM TO 01:00 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 steam table is permitted
Q.1 (a) Describe Rankine cycle with the help of schematic,(T-S) and (h-s) diagrams and derive the
expression for its efficiency
07
(b) A steam power plant working on Rankine cycle has range of operation from 30 bar dry
saturated to 0.06 bar. Determine, (i) Cycle efficiency (ii) Work ratio (iii) Specific steam
consumption
07
Q.2 (a) State the applications of gas turbine and Derive an expression for the thermal efficiency of an
actual Brayton cycle.
07
(b)
The air enters the compressor of an open cycle constant pressure gas turbine at a pressure of 1 bar and
temperature of 20 ?C. The pressure of the air after compression is 4 bar. The isentropic efficiency of
compressor and turbine are 80 % and 85 % respectively. The air fuel ratio used is 90 : 1. if the flow rate
of air is 3 kg per second Find, (i) Power developed (ii) Thermal efficiency of the cycle
Assume, Cp = 1 kJ/kgK and ? = 1.4, for air & gasand C.V.of fuel = 41800kJ/kg
07
OR
(b)
Write advantages and disadvantages of Hydroelectric power plant Also write classification for hydraulic
turbines.
07
Q.3 (a)
With the help of a neat sketch explain the working of pressurized water reactor
(PWR). Also write advantages over others.
07
(b)
Give detail classification of steam turbines. What is compounding of steam turbine .state the different
methods of compounding of steam turbine?
07
OR
Q.3 (a)
State the functions of engine cooling system. With the help of neat sketch explain working of thermostat
cooling system.
07
(b)
What is intercooling and regeneration? Sketch simple line diagram and T-s diagram
of open cycle gas turbine with intercooling, reheating and regeneration.
07
Q.4 (a)
State the various methods of governing of steam turbines. Explain nozzle governing with neat sketch.
07
(b)
Explain with neat sketch full pressure lubrication system for diesel power plant.
07
OR
Q.4 (a) Derive an equation maximum blade efficiency for single stage Impulse turbine. And hence derive
the equation for maximum power output per kg of steam.
07
(b) Differentiate between Nuclear fission and fusion process. Explain Nuclear fission and chain
reaction.
07
Q.5 (a) Describe the significance of load curves in planning and determining the size of Units in power plants.
Define base load, Intermediate load and peak loads, with load curves.
07
(b) Draw a General layout of a thermal power plant and discuss the various circuits.
Also explain the working of steam power plant.
07
OR
Q.5 (a) With a neat diagram explain diesel power plant
07
(b) Describe with the help of a neat sketch CANDU type nuclear reactor. 07
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This post was last modified on 20 February 2020