Power Plant Engineering : Question Paper May 2014 - Mechanical Engineering (Semester 7)

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Power Plant Engineering - May 2014

Mechanical Engineering (Semester 7)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Write short notes on any four of the following

1 (a) Different types of traffic methods.(10 marks) 1 (b) Water hammering effects and its remedies(10 marks) 1 (c) Mechanical dust collectors(10 marks) 1 (d) Advantages of Fluidized Bed Combustion(10 marks) 1 (e) Classification of nuclear power plant(10 marks) 2 (a) What are the parameters to be considered in choosing a site for a coal fired thermal power plant(10 marks) 2 (b) Briefly discuss current energy scenario in Maharashtra. Answer should highlight power scenario in Mumbai.(10 marks) 3 (a) Describe the various methods of improving; the performance of a gas turbine power plant.(10 marks) 3 (b) From the following estimate the generating cost and also find if any reserve is available
Annual load factor - 60%
Capacity factor - 50% Installed capacity of the plant ~ 140 MW Capital cost of the plant - Rs. 200 × 10⁶ Annual cost of coal, oil and salaries Rs. 20× 10⁶
Rate of interest - 5%of capital
Rate of depreciation - 5% of capital.(10 marks) 4 (a) (i) Explain in brief social and environmental effects of a hydro power plant(5 marks) 4 (a) (ii) Briefly explain different sub systems in D. G. Plant.(5 marks) 5 (a) A 2.4 hrs load duration curve on a small power plant is a straight line between 6 MW 10 and 2 MW respectively. The plant capacity is 7 MW. Find the plant load factor and plant capacity factor. If the power charges are Fis. 2.5 per kWh, find the charge to be paid per day.(10 marks) 5 (b) What are the different ways of ash disposal? Describe any one method in detail.(10 marks) 6 (a) State advantages of gas turbine plant over Diesel and thermal power plant(8 marks) 6 (b) The run off data of a river for 12 Months at a particular site is given below:

Month	Discharge millions of m³ per month	Month	Discharge millions of m³per month
Jan	1500	July	3000
Feb	1200	Aug	3600
March	900	Sept	3000
April	600	Oct	2400
May	300	Nov	2100
June	2100	Dec	1800

Draw : (i) Hydrograph (ii) Flow duration curve (iii) mass curve. lf available water head at the site is 90 m, find power generated. Take Turbine efficiency 90%, generator efficiency 95% and 30 days in a month.(12 marks) 7 (a) Explain CANDU type nuclear reactor with neat sketch mentioning type of fuel and moderator.(10 marks) 7 (b) A residential consumer has the following connected load : Four tube lights of 40W each. Three Fans of 60 W each, Two night lamps of 15 W each and television of 100 W. Use of electricity during a day is as follows
12 midnight to 6 am. :2 Fans + 2 Night lamps
6 am. to 9 am. : 1 Fan + 1 Tube light
9 am. to 3 p. m. : Nil
3 pm. to 6 pm. : 3 Fans 7: Television
6 pin. to 9 pm. : 2 Fans + 4 Tube lights
9 pm. to 12 midnight 3 Fans + 2 Tube lights + Television.
Find : (a) Connects-:5 load (b) maximum demand (0) Demand factor.(10 marks)

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