1 (a)
What is the importance of 'Non-Conventional Energy Source's in the context of Present Energy Scenario?

8 M

1 (b)
Explain energy status of India & Maharashtra and role of NCES.

8 M

1 (c)
Define the solar constant. What is its value?

4 M

2 (a)
Define and explain the following:

i) latitude angle

ii) Hour angle iii) Declination angle iv) Day length.

i) latitude angle

ii) Hour angle iii) Declination angle iv) Day length.

8 M

2 (b)
Estimate the monthly average daily global radiation on a horizontal surface at Ratnagiri (16°59' N, 72°05' E) during the 16

^{th}march if the average sunshine hours per day is 9.5. Assume the value of a=0.31 and b=0.43.
7 M

2 (c)
Find the days of the year on which the sun is directly overhead at 1200 h (LAT) at Pune (18°32' N).

5 M

3 (a)
What is Betz coefficient? Show that the maximum power coefficient is 59% for a horizontal axis wind mill.

10 M

3 (b)
The following data are given for a family biogas digester suitable for the output of 10 cows; the retention time is 30 days, temperature 30°C, dry meter consumed 2kg/day/cow, and biogas yield is 0.24 m

^{3}per kg. The efficiency of burner is 60%, methane proportion is 0.8. Heat of combustion of methane is 28 MJ/m^{3}. Calculate the volume of digester and the power available from the digester. Assume density of dry material in the fluid is 50 kg/m^{3}.
10 M

4 (a)
A tidal power plant of the simple single basin type has a basin area of 30×10

^{6}m^{2}. The tide has a range of 12m. The turbine however stops operating when the head on it fall below 3 m. Calculate the energy generated in one filling (or emptying) process, in kWh if the turbine generator efficiency =73%.
8 M

4 (b)
Explain with neat sketches, how energy from Geothermal source can be obtained in different ways.

5 M

4 (c)
Propeller type wind turbine of 120 m diameter is running with 40 rmp at a velocity of 15 m/s with maximum efficiency. The atmospheric pressure is 1.01325 bar and the temperature is 15°C Calculate:

i) The total power density in the wind stream

ii) The maximum obtainable power density.

iii) The total power.

i) The total power density in the wind stream

ii) The maximum obtainable power density.

iii) The total power.

7 M

5 (a)
Plot the variation of τ

_{r}, τ_{α}and τ with the angle of incidence for the following cover system:Material | : Glass |

Number of cover | =3 |

Thickness of each cover | = 4mm |

Refractive index of glass relative to air | = 1.52 |

Extinction coefficient of glass | = 15 m^{-1} |

10 M

5 (b)
Describe with a neat sketch the working of wind energy system showing the main components. Discuss advantages of wind energy conversion systems.

10 M

6 (a)
Draw a neat diagram and explain working of a KVIC design of biogas digester?

10 M

6 (b)
How can wave energy be utilized?

10 M

Write short notes on any four:

7 (a)
Utilization of tidal energy.

5 M

7 (b)
Site selection considerations for wind mill

5 M

7 (c)
Fuel cells

5 M

7 (d)
Micro-hydro power generation

5 M

7 (e)
Operational and environmental problems of geothermal energy.

5 M

More question papers from Renewable Energy Sources