FACULTY OF ENGINEERING B.E. 4/4 (EE / Inst.) II – Semester (Main) Examination, April / May 2013 Subject: Renewable Energy Sources (Elective – II) Time: 3 Hours
Max.Marks: 75
Note: Answer all questions from Part – A and any five questions from Part – B. PART – A (25 Marks) 1.
What are the advantages of use of renewable sources of energy?
(3)
2.
Mention the problems associated with wind energy conversion.
(2)
3.
Give the reasons for low efficiency of solar cells.
(3)
4.
Define the following terms:
(2)
a) Beam radiation 5.
b) Diffuse radiation
Discuss the following terms associated with wind energy a) Tip speed ratio
b) Cut-in speed
(3)
c) Cut-out speed
6.
Discuss the favourable sites for installing windmills.
(2)
7.
What is plate tectonic theory and how is it related to geothermal energy?
(3)
8.
What do you mean by biogas?
(2)
9.
Discuss the relative advantages and limitations of tidal power projects.
(3)
10.
Describe the process of extracting energy from waves.
(2)
PART – B (5x10 = 50 Marks) 11.
Discuss renewable and conventional forms of energy. Highlight their merits and demerits.
(10)
12.(a) Explain the working principle of Brayton engine with necessary diagrams. (b) Discuss the working of flat plate collector.
(5) (5)
13.(a) Explain the current voltage characteristic of solar cell. Also define the fill factor. (b) Explain the different types of solar cells based on the material used for their fabrication.
(5)
14.(a) Explain the working of horizontal axis windmill with suitable diagram. (b) Derive the equation for power available in wind.
(5) (5)
15.(a) Explain the binary cycle system for liquid dominated system. (b) Explain the difference between a geothermal power plant and thermal power plant.
(7) (3)
16.(a) Explain the working of closed cycle Anderson OTEC plant. (b) Discuss the impact of OTEC on environment.
(7) (3)
17.
(10)
Write short notes on: a) Induction generator b) Tidal energy ****
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