POWER PLANT ENGINEERING

1. Code No: M0328 R07 Set No.1
IV B.Tech. I Semester Regular Examinations, November, 2011
POWER PLANT ENGINEERING
(Mechanical Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) What do you understand by commercial and non-commercial energy sources?
List out the changes from non-commercial to commercial during the last nine
plans? [10]
b) Why the development of nuclear power is slow in India? [6]
2. Draw a neat line diagram of in plant coal handling and explain the equipment used at
different stages. [16]
3. With a neat line diagram showing all the systems explain diesel power plant. [16]
4. a) Prove that the pressure ratio of closed cycle for the maximum specific output is
the square root of the pressure ratio for the maximum thermal efficiency.
Why low pressure is used in gas turbine power plant. [8]
b) Draw the line diagram of repowering system using steam turbine only and boiler
only. Discuss their relative merits and demerits. [8]
5. a) What are the different factors to be considered while selecting the site for Hydro-
electric power plant? [8]
b) What is a spillway? Explain any three types of spillways with sketches. [8]
6. a) Explain the components of Tidal power plant. [8]
b) Compare flat plate collectors and focusing collectors. [8]
7. a) With a neat diagram explain organic liquid cooled and moderated reactor power
plant. [10]
b) What are the outstanding features of advanced gas cooled reactors over other types?
When these are preferred? [6]
8. a) The peak load on a power station is 30 mw. The loads having maximum demands of
25MW, 10 MW, 5 MW and 7 MW are connected to the power station. The capacity
of the power station is 40 MW and annual load factor is 50%.
Find i) Average load on the power station
ii) Energy supplied per year
iii) Demand factor
iv) Diversity factor
b) Explain the different methods adopted to control the nuclear pollution.
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2. Code No: M0328 R07 Set No.2
IV B.Tech. I Semester Regular Examinations, November, 2011
POWER PLANT ENGINEERING
(Mechanical Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) What are the basic resources in India for power generation? Explain their capacities
in different regions.
b) Name the various methods of ash handling. Describe the pneumatic system of ash
handling. Why it is essential to quench the ash before handling?
2. Describe different types of over feed stokers and mention the merits and demerits of
each over others.
3. Draw a neat diagram of a cooling system used for diesel power plant showing all the
essential components. What are the advantages of double circuit over single circuit
system?
4. What are the different methods used to improve the thermal efficiency of the open
cycle gas turbine plant? Explain each in detail.
5. a) How the hydro electric power plants are classified?
b) What factors are mainly considered in selecting a prime mover for
i) Run off river plant
ii) Storage plant
iii) Pump storage plant
6. a) What is the basic difference between thermo electric and Thermionic conversion
systems?
b) What methods are used to over come the fluctuating power generation of a
wind mill?
7. a) What is boiling water reactor? How does it differ from pressurized water reactor?
b) Give the classification of nuclear wastes in detail.
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3. Code No: M0328 R07 Set No.2
8. a) A residential consumer has lamps of 40 watts each connected at his resistance.
His demand is
5 AM to 6 AM – 40 watt
6 AM to 6 PM – 120 watt
6 AM to 7 AM – 325 watt
7 PM to 9 PM – 360 watt
9 PM to 12 Mid night – 160 watt
i). Plot the load curve
ii). Find average load
iii). Maximum load
iv). Load factor
v). Energy consumption for two days
b) Discuss the various methods of reducing SO2 emissions.
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4. Code No: M0328 R07 Set No.3
IV B.Tech. I Semester Regular Examinations, November, 2011
POWER PLANT ENGINEERING
(Mechanical Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) Describe the development of thermal power in the country during the last nine
plan period.
b) Describe the various factors which determine the location of a steam power station.
2. a) Draw a neat diagram of multi retort under feed stoker and explain its working.
Discuss its merits over other types of stokers. [10]
b) What are the advantages of burning the fuels in pulverized form? [6]
3. Explain various types of fuel injection systems with neat diagram.
4. a) An open cycle gas turbine plant takes air in at 1 bar and 320C. The maximum
pressure ratio and maximum temperature of the cycle are limited to 7bar and
1100 K respectively. The isometric efficiencies of compressor and turbine are
84% and 85% respectively. The effectiveness of the regenerator is 0.6.
Assuming the combustion efficiency 90% and neglecting the heat and
pressure losses in the system, find the cycle efficiency and A:F ratio used.
If the air flow is 10 kg/sec, find the generation capacity of the plant assuming
mechanical efficiency 96% and generation efficiency 95%.
b) What are the relative merits and demerits of using air or O2 in a gasification
plant when the gasification plant is integrated with closed cycle gas turbine.
5. a) What are the functions of surge tank and fore bay? Describe any two types of
surge tanks.
b) What do you understand by water hammer and what are its effects on the
power plant design?
6. What do you understand by MHD? Explain the working principle of MHD with
neat sketches.
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5. Code No: M0328 R07 Set No.3
7. a) With the help of a neat diagram, explain sodium cooled reactor.
b) Discuss the various factors to be considered while selecting the site for a
nuclear power station.
8. a) A central power station has annual factors as follows:
Load factor = 60%
Capacity factor = 40%
Use factor = 50%
Power station has a maximum demand of 20MW.
Determine
i). Annual energy production
ii). Reserve capacity over and above peak load
iii). Hours per year not in service
b) What are the main pollutants from a power station? What is meant by air pollution?
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6. Code No: M0328 R07 Set No.4
IV B.Tech. I Semester Regular Examinations, November, 2011
POWER PLANT ENGINEERING
(Mechanical Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) Draw a general layout of a thermal power plant and explain the working of
different circuits. [10]
b) Write a detailed note on present status of power generation in India. [6]
2. a) What are the requirements of the burners used for firing pulverized coal? Describe
cyclone burner.
b) Give a layout of unit system of pulverized fuel burning. List its advantages and
disadvantages.
3. a) Draw a neat diagram of a fuel storage and fuel supply system used for a diesel
power plant. [12]
b) Write the advantages and disadvantages of diesel plants over thermal plants. [4]
4. a) What are the effects on the thermal efficiency and specific output of gas turbine
plant of the following factors
i). Load on the plant
ii). Pressure ratio
iii). Turbine inlet temperature
iv). Compressor inlet temperature
b) Discuss the part load behavior of combined cycle plant and compare with
conventional gas turbine plant of the same capacity.
5. a) Draw a neat diagram of storage type hydroelectric power plant and describe the
functions of each component used in the plant. [10]
b) Why the combined operation of hydro and thermal plants is more economical
than individual operation of the plant? [6]
6. a) Explain the working of a fuel cell and list out its advantages over other non
conventional systems. [12]
b) Differentiate single basin and double basin systems. [4]
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7. Code No: M0328 R07 Set No.4
7. a) With the layout explain fast breeder reactor power plant.
b) Explain the properties of moderator, coolant and reflector.
8. a) The daily load for a power plant is given by the equation L=290 + 12t-t2 where
t is time in hours from 0 to 24 hours and L is the load in MW.
Calculate
i). Magnitude of maximum load when it occurs and
ii). Plant load factor
b) What are the different methods used to control Nox in flue gases? Explain any two.
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