a knowledge trading engine...

Visvesvaraya Technological University (VTU) 2007 B.E Electrical and Electronics Engineering 7th SEM .06/.07 RENEWABLE ENERGY SOURCES - Question Paper

Wednesday, 12 June 2013 04:15Web

Page 1 of 3

Ivlv / J J

USN								1 1
NEW SCHEME

Seventh Semester B.E. Degree Examination, Dee.06 / Jan.07 Electrical and Electronic Engineering Renewable Energy Sources

Time: 3 hrs.] [Max. Marks: 100

Note: J. Answer any FIVE full questions.

1 a. Stale the major conventional and non-conventional energy sources. List their

approximate percentage contribution to the total word energy consumption. (06 Marks)

b. Distinguish between conventional and non-conventional sources of energy. (08 Marks)

c. Enumerate the availability of renewable energy sources in India. (06 Marks)

2 a. Give descriptive definitions for the following terms associated with solar radiation :

' i) Beam and diffused radiation.

ii) Insolation.

iii) Zenith angle. (06 Marks)

b. Calculate the sunset hour angle and day length at a location latitude of 35N on May 28. (04 Marks)

c. Classify the instruments used for measurement of solar radiation. Write a npte on pyrheliomeier and pyranometer. (10 Marks)

3 a. What is greenhouse effect? Briefly explain how this principle is employed in flat

plate collectors. (04 Marks)

b. What are the advantages and disadvantages of concentrated collectors over fiat plaie collectors⁰ (08 Marks)

c. Classify solar energy storage systems. Describe in brief the different storage s> stems.

(OS Marks)

4 a. With the help of a neat diagram explain the construction and working principle of a

solar pond. (10 Marks)

b. Describe the working principle of a solar photovoltaic celi. With the help of a neat diagram explain the working of a solar photovoltaic power system. (io Marks)

5 a. Classify the wind energy conversion systems. (04 Marks)

b. Expiain the basic principle of wind energy conversion. Draw a neat sketch of a horizontal axis wind turbine and describe its main components. (U Marks)

c. The rotor diameter of a horizontal axis wind turbine generator is 126m. The velocity of wind is 13.5 m/s and density of air is 1.23 kg/m³. Calculate the power in the wind.

(04 Marks)

6 a. Define Biomass. Give a descriptive classification of biomass resources. (05 Marks)

b. Describe the process of biogas generation. List the factors affecting the generation of gas. - (05 Marks)

c. Give the broad classification of biogas plants. List different types of biogas plants available in India. Explain, with a neat sketch, a KVIC type biogas plant, (io Marks)

EE751

a. Discuss the basic principle of Oceanic Thermal Energy Conversion (OTEC). List main types of OTEC systems and describe them briefly. ! (08 Marks)

b. How is the energy from tides obtained? Describe the arrangements of operation methods of utilization of tidal energy. (08 Marks)

c. A tidal power plant of 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 kwh if the turbine generator efficiency is 0.73. Water density is 1025 kg/m², Gravity is 9.80 m/s² and time is 6h, 12.5 min. (04 Marks)

Write descriptive notes on:

a. Energy plantations and their advantages and disadvantages.

b. Advantages and limitations of tidal power generation.

c. Applications of wind power.

d. Photosynthesis and conditions necessary for it. (^{20 Marks}