Download JNTUA B.Tech 4-2 R15 2019 April Regular 15A03804 Power Plant Engineering Question Paper

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Code: 15A03804

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B.Tech IV Year II Semester (R15) Regular Examinations April 2019

POWER PLANT ENGINEERING

(Mechanical Engineering)

Time: 3 hours

Max. Marks: 70

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PART - A

(Compulsory Question)

1. Answer the following: (10 X 02 = 20 Marks)
   1. Explain nuclear fission.
   2. Give a note on pollutants of power plants.
   3. Explain coal handling equipment.

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   4. List the important parameters for selection of site for a steam power plant.
   5. Sketch proper P-v and T-s diagrams for a diesel engine.
   6. Sketch proper T-s diagram for a two stage gas turbine power plant with intercooling.
   7. Define spill ways.
   8. Define catchment area.

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   9. What are the different methods of harnessing solar energy?
   10. What is heavy water? Explain.

PART - B

(Answer all five units, 5 X 10 = 50 Marks)

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UNIT - I

2. (a) Define load factor and capacity factor.
   (b) A power plant of 210 MW installed capacity has the following particulars:
   Capital cost - Rs. 18,000 / kW installed
   Interest and depreciation - 12%
   

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   Annual load factor - 60%
   Annual capacity factor - 54%
   Annual running charges - Rs 200 x 10⁶
   Energy consumed by power plant auxiliaries - 6%.
   Calculate: (i) The cost of power production per kWh. (ii) The reserve capacity.
   

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   OR
3. (a) Explain the significance of combined power cycles.
   (b) With a proper sketch, explain how MHD technique is used in power generation.

UNIT - II

4. (a) List the different types of mechanical stokers and explain any one of them with proper sketch.
   

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   (b) What is pulverization? How does it help in burning of coal?
   OR
5. (a) Explain steam power plant with neat diagram.
   (b) Write a note on pollution from thermal power plants.

UNIT - III

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6. (a) Explain combustion chamber of an open cycle gas turbine plants.
   (b) List the different areas of application of diesel engines in power production. Also list the advantages of a diesel power plant.
   OR
7. (a) Give layout of a low capacity diesel power plant and explain its function.
   (b) A gas turbine takes in air at 101 kN/m² and 15°C. The air is compressed to a pressure of 606 kN/m² and then passed through a regenerative heat exchanger of effectiveness 0.65. The air is then passed through the combustion chamber where the temperature is increased to 870°C by the combustion of fuel. The gases enter the turbine and are expanded to 101 kN/m² pressure. Assuming a compressor efficiency of 85% and a turbine efficiency of 80%, determine for an air flow rate of 4 kg/s: (i) The power output of the plant.
   

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   (ii) Exhaust temperature from heat exchanger.
   (iii) The thermal efficiency of the plant.
   (iv) The thermal efficiency of plant without heat exchanger.

UNIT - IV

8. (a) Explain the different factors that are considered while selecting site for a hydro-electric power plant.
   

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   (b) The mean monthly discharge for 12 months at a particular site of a river as given below:
   

   Month	Discharge in millions m3 per month	Month	Discharge in millions m3 per month
   A (April)	500	O	2000
   M	200	N	1500
   J	2500	D	1000
   J	3000	I	800
   A	2400	F	600
   S	1500

   Draw: (i) Hydrograph for the given discharge and find the monthly average flow. (ii) The power available at mean flow of water if the available head is 80 m at the site and the overall efficiency of generation is 80%.
   OR
9. (a) Explain storage and pondage of water.
   (b) Give complete note on working principle of a hydroelectric power plant with neat diagram.

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UNIT - V

10. (a) Explain how power is produced from wind energy.
    (b) Write a note on MHD power generation.
    OR
11. (a) Sketch a general nuclear reactor and explain its components.
    

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    (b) Write a brief note on tidal energy harvesting.