Visvesvaraya Technological University (VTU) 2006 B.E Electrical and Electronics Engineering 7th SEM /e RENEWABLE ENERGY SOURCES - Question Paper
Seventh Semester B.E. Degree Examination, May / June 2006 Electrical and Electronics Engineering Renewable Energy Sources
Time: 3 hrs.] [Max. Marks: 10(
Note: 1. Answer any FIVE full questions. 2. Assume suitably any missing data.
1 a. What is meant by renewable Energy Sources? Describe in brief these energy sources
with special reference to Indian context. (10 Marks)
b. Write short notes on Beam and Diffuse radiation. (lOMzrks)
2 a What are the main components of a flat plate collector. Explain with a neat diagram
the functions of each component. (08 Marks)
b. Determine the average value of solar radiation on a horizontal surface for June 22. at the latitude of 10 N, if constants a and b are given as equal to 0.30 and 0.51 and
= 0.55. (06 Marks)
c. Determine the solar local time and declination at a location latitude 23 I s'N. longitude 7730' E at 12.30 1ST on June 19. Equation of time correction is given as = - (11 0 111). (06 Marks)
3 a. What is the principle of collection of solar energy in a Solar Pond? Explain the
principle of Solar Pond and list the applications of Solar Pond. (10 Marks)
b. With the help of a neat sketch, explain natural circulation pressurized type solar water heater. (10 Marks
4 a. What is the principle of Solar photovoltaic power generation0 What are the main
elements of a PV system. (lOMar!.-
b. Write short notes on Solar Cookers. (10 Mark;
5 a. Prove that in case of horizontal axis wind turbine maximum power can be obtained.
when Exit velocity = 1/3 wind velocity and Pmax = p AV3. (10 Mark
b. Describe the main consideration for the choice of site for w ind generation. (06 Mark
c. List the application of wind energy. (lOMark
Contd.
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6 a. Explain the constructional details and principle of K.VIC digester. (10 Marks)
b. The following data are given for a family of biogas digester suitable for the output of five cows: the retention time is 20 days, temperature 30c, dry matter consumed per day = 2 kg, biogas yield is 0.24 m3 / kg. The efficiency of burner is 0.60. methane proportion is 0.8. Heat of combustion of methane is 28 MJ / M3.
Determine i. The volume of biogas digester and ii. Power available from the digester.
Assume p m = 50 kg / m'\ (10 Marks)
7 a. Explain the advantages and limitations of Tidal power generation. (10 Marks)
b. A tidal power plant of the simple single basin type has a basin area of 30 x 106 m2. The tide has a range of 12 m. The turbine however stops operating when the head on it falls below 3 m. Calculate the energy generated in one filling or emptying process in K W'h if the turbine generator efficiency is 0.73. (10 Marks)
8 Write Technical notes on :
i. Ocean Thermal Electric Conversion.
ii. Classification of WECS.
iii. Solar Pumping.
iv. Biogas generation. (20 Marks)
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| Earning: Approval pending. |
