Anna University Chennai 2009-8th Sem B.E Electrical and Electronics Engineering EEE, ester, EE 1451 – ELECTRIC ENERGY GENERATION, UTILISATION AND CONSERVATION, /E . - Question Paper

B. E. / B. Tech. DEGREE EXAMINATION, MAY/JUNE 2009.

Eighth Semester
(Regulation 2004)

Electrical and Electronics Engineering
EE 1451 – ELECTRIC ENERGY GENERATION, UTILISATION AND CONSERVATION
(Common to B.E. (Part – Time) 7th Semester Regulation 2005)

Time : 3 hours Maximum : 100 marks
ans ALL ques..

PART A – (10 X two = 20 marks)
1. Give 2 examples of renewable energy sources.
2. What is minimum wind velocity needed for power generation through wind mill?
3. State the few methods of improving the power factor in the industry.
4. What are the various kinds of tarrifs?
5. Define Illumination.
6. State the advantages of electric heating.
7. List 2 merits of series-parallel starting of traction motors.
8. What are the factors affecting specific energy consumption?
9. What is load equalization?
10. Give the merits and demerits of group drive.

PART B – (5 X 16 = 80 marks)]
11. (a) define briefly the generation of electrical power by conventional methods. [Marks 16]
(OR)
(b) define with a neat sketch the working of a wind energy conversion system. [Marks 16]

12. (a) (i) discuss briefly about various energy auditing methods in use. [Marks 8]
(ii) Bring out the importance of energy conservation measures in electric energy consuming industry. [Marks 8]
(OR)
(b) A Generating station has the subsequent daily loads.
0 to six hrs 4000 kw
six to eight hrs 3000 kw
eight to 12 hrs 8000 kw
12 to 14 hrs 2000 kw
14 to 18 hrs 7500 kw
18 to 20 hrs 3000 kw
20 to 24 hrs 4500 kw
Sketch the load duration curve and determine the load factor assuming the capacity of the plant 11,000 kw [Marks 16]
13. (a) (i) With a neat diagram discuss the working of a low pressure mercury vapour lamp. [Marks 8]
(ii) A lamp of 500 C.P. is hung at the centre of a room eight x six m2 at a height of 3m from the floor. compute the maximum and minimum illumination produced and mention the places where it occurs. [Marks 8]
(OR)
(b) A 30 Kw, three phase, 440 V resistance oven is to employ nichrome strip 0.025 cm thick for the 3 star connected heating elements. If the wire temperature is to be 1100oC and that of charge is to be 700oC. Estimate a suitable width for the strip. presume resistivity as 1.016 x 10-6 ?m, emissivity 0.9 and radiating efficiency 0.5. [Marks 16]

14. (a) (i) Draw a typical speed-time curve and discuss its salient features. [Marks 8]
(ii) An electric train is accelerated at 1.5 kmphps and is braked at three kmphps. The tarin has an avg. speed of 45 kmph on a level track of 1500 meters ranging from stations. Determine the maximum speed and distance traveled before applying brakes. [Marks 8]
(OR)
(b) A locomotive accelerates a 350 tonne train up a gradient of one in 100 at 0.8 kmphps. Assuming coefficient of adhesion to be 0.25 determine the minimum adhesive weight of the locomotive. presume train resistance 44.5 Newtons/tonne and allow 10% for rotational inertia. [Marks 16]

15. (a) Disuss in detail the different factors governing the selection of a motor for a particular application. discuss with an example. [Marks 16]
(OR)
(b) explain the modern methods of speed control of industrial drives. [Marks 16]

Earning:   Approval pending.