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GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING – SEMESTER –VI • EXAMINATION – WINTER 2015
Subject Code: 3361906 Date: 10/12/2015
Subject Name: POWER PLANT 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.
4. Use of programmable & Communication aids are strictly prohibited.
5. Use of only simple calculator is permitted in Mathematics.
6. English version is authentic.
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Q.1 Answer any seven out of ten. 14
1. State types of energy sources.
2. Define central power plant and captive power plant.
3. State any 4 advantages of nuclear power plant.
4. State any two parameter of power cycle.
5. List high pressure boilers with application.
6. Explain ESP.
7. Draw line diagram of reheat renkine cycle.
8. Draw line diagram of closed cycle gas power plant.
9. List advantages of hydro power plant.
10. What is cost of electrical energy?
Q.2 (a) State Difference between power plant and power station. 03
OR
(a) State energy conversion in various power plant with line diagram. 03
(b) Explain national grid and it’s importance. 03
OR
(b) Explain general arrangement of nuclear power plant. 03
(c) Explain simple renkine cycle with P-V and T-S diagram. 04
OR
(c) Explain methods of improving rankine cycle efficiency. 04
(d) Explain benson boiler. 04
OR
(d) Explain super heater and air pre heater of high pressure boiler . 04
Q.3 (a) Draw schematic diagram of modern thermal power plant 03
OR
(a) Explain pulverized fuel handling systems. 03
(b) Explain effect of load variation in steam power plant. 03
OR
(b) State basic elements and requirements of good control system of power plant. 03
(c) Explain need of record keeping and their purpose in power plant. 04
OR
(c) Explain methods to improve the thermal efficiency of a simple open cycle constant pressure gas turbine power plant 04
(d)In air standard gas turbine , air enter at 16 deg. Centi and 1.01 bar in compressor . where it’s pressure is increased by 5 times . The temp. of air entering turbine is 810 deg. Centi and expansion up to 1.01 bar pressure . find work ration of turbine to compressor. (г = 1.4 and Cp= 1.005 kJ/Kg K) 04
OR
(d) State essential components of gas turbine power plant and explain their functions. 04
Q.4 (a) Write advantages and disadvantages of wind power plant. 03
OR
(a) State conversion systems for solar energy and Explain Tower concept for power generation. 03
(b) Explain potential of solar and wind energy in India with current data. 04
OR
(b) Explain cost of electrical energy. 04
(c) A steam power plant working on rankine cycle having boiler pressure 35 bar and condenser pressure 0.1 bar .steam temp. entering turbine is 350 deg.centi. find 1) rankine cycle efficiency 2) specific steam consumption .(use mollier chart and steam table ) 07
Q.5 (a)Explain terms 1. Load curve 2. Demand factor, 3. Average load 4. Plant capacity factor. 04
(b) A power plant having yearly maximum load is 180 MW. And minimum load is 60 MW. Plant generate 92x10^4 MWh energy . this plant has one unit of 110 MW and 2 units of 60 MW . find 1. Load factor 2. Total capacity . 3. Average load 4. Plant capacity factor . 04
(c) Explain Diesel power plant. 03
(d) State Criteria for selection of installation of nuclear power plant 03
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