# JNTU Kakinada B-Tech 4-1 NON CONVENTIONAL SOURCES OF ENERGY (Open Elective) R13 March 2018 Question Paper

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
NON CONVENTIONAL SOURCES OF ENERGY (Open Elective)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (22 Marks)1. a) Define and briefly explain day length and surface azimuth angle. [4]
b) Describe the collector efficiency curve of the flat-plate collector. [4]
c) If the saturation current is 10
-8
Am
-2
, calculate and draw the I ?V
characteristic as a graph to 0.2 V.
[3]
d) A large wind turbine has a blade diameter of 100 m, at what rotor speed (frequency) will the tip-speed exceed the speed of sound?
[4]
e) Briefly describe how the wave energy is extracted from different devices. [4]
f) Describe in brief the profile of hot dry rock system for calculating heat content. [3]

PART ?B (3×16 = 48 Marks)2. a) Estimate the monthly average daily global radiation using Kleen’s
recommendation, on a horizontal surface at New Delhi (28?38′ N, 77
0
17′ E)during the month of April if the average sunshine hours per day are 9.5. Use the
relation.
) /
?(
?
/
?
max
S S b a H H
0 g
? ?
g
H
?
= Monthly average of the daily global radiation on horizontal surface at a
location in kJ/m
2
-day
0
H
?
= Monthly average of the daily global radiation on a horizontal surface at
the same location on a clear sky in kJ/m
2
-day
S
?
= Monthly average sunshine hours per day at the location in hour
max
S = Maximum day length a, b, are constants by fitting data, given as 0.25 and
0.45 respectively.

[8]
b) Explain how the solar radiation is determined on tilted surface for Indian
conditions.
[8]

3. a) Describe the operation of non-convective solar pond for the solar energy
collection and storage.
[8]
b) Derive the relation for transmittance coefficient for the series of glass covers in
flat plate collector.
[8]

Code No: RT41026
Set No. 1
R13
1 of 2

IV B.Tech I Semester Supplementary Examinations, February/March – 2018
NON CONVENTIONAL SOURCES OF ENERGY (Open Elective)Time: 3 hours Max. Marks: 70
Question paper consists of Part-A and Part-B
Answer ALL sub questions from Part-A
Answer any THREE questions from Part-B
*****

PART ?A (22 Marks)1. a) Define and briefly explain day length and surface azimuth angle. [4]
b) Describe the collector efficiency curve of the flat-plate collector. [4]
c) If the saturation current is 10
-8
Am
-2
, calculate and draw the I ?V
characteristic as a graph to 0.2 V.
[3]
d) A large wind turbine has a blade diameter of 100 m, at what rotor speed (frequency) will the tip-speed exceed the speed of sound?
[4]
e) Briefly describe how the wave energy is extracted from different devices. [4]
f) Describe in brief the profile of hot dry rock system for calculating heat content. [3]

PART ?B (3×16 = 48 Marks)2. a) Estimate the monthly average daily global radiation using Kleen’s
recommendation, on a horizontal surface at New Delhi (28?38′ N, 77
0
17′ E)during the month of April if the average sunshine hours per day are 9.5. Use the
relation.
) /
?(
?
/
?
max
S S b a H H
0 g
? ?
g
H
?
= Monthly average of the daily global radiation on horizontal surface at a
location in kJ/m
2
-day
0
H
?
= Monthly average of the daily global radiation on a horizontal surface at
the same location on a clear sky in kJ/m
2
-day
S
?
= Monthly average sunshine hours per day at the location in hour
max
S = Maximum day length a, b, are constants by fitting data, given as 0.25 and
0.45 respectively.

[8]
b) Explain how the solar radiation is determined on tilted surface for Indian
conditions.
[8]

3. a) Describe the operation of non-convective solar pond for the solar energy
collection and storage.
[8]
b) Derive the relation for transmittance coefficient for the series of glass covers in
flat plate collector.
[8]

Code No: RT41026
Set No. 1
R13
1 of 2

4. a) Draw the I-V characteristics of PV cell and describe the system configuration
for maximum power extraction from PV system.
[8]
b) Explain step-by-step procedure of perturb & observe method of maximum
power point technique.
[8]

5. a) Briefly describe cut-in speed and cut-out speed in wind energy conversion
system.
[6]
b) Explain maximum power point tracking procedure in a wind energy conversion
system.
[10]

6. a) Explain how head and flow is measured in small hydro power conversion?
Describe its e energy equation.
[10]
b) Briefly describe the principle and limitations of tidal power generation? [6]

7. a) Briefly explain the different types of bio-gas plants with its schematic diagrams. [10]
b) Describe the importance of earthquakes and volcanoes in the formation of
geothermal resources.
[6]

Code No: RT41026
Set No. 1
R13
2 of 2

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