(1
16
EE -745
(
)
cell
efficiency
motor
is
and pump
12%
.
The
is
50%
.
at
as
/m²
.
incident
W
water
800
fresh
rate
is
combined
efficiency
of
panel
radiation
water discharge
the
global
Calculate the
when
to
density
.
6
Total
1
.
N.B
number
)
)
16
EE -745
(
of printed pages6
Full
Time
Marks
:
100
Three hours
is
four
1
)
NCES
indicate
.
answers
EI
(
with
data where
.
questions from
compulsory
the questions
the margin
for
:
in
marks
Question
No.
(1
Attempt any
.
your
graphs
5x8 = 40
and secondary energy
.
suitable
remaining six questions
Assume
,
required
Justify
diagram
are primary
the
of
are
prospects
What
in
.
sources
India ?
non -conventional energy
reasons
in
are
the
variation
What
solar
the
outside
of
the
radiation reaching the earth than
at
atmosphere ?
received
Contd
.
for
sources ?
What
(
4)
(3 )
(2 )
)
full
The figures
.:
a
b
.
NON -CONVENTIONAL ENERGY SOURCES
2015
noon
normally
Assume
G
(EI )/
996 kg/m³
NCES
100
)
2
16
:
c
d
)
)
Explain
is
Wind
Mill
.
of
wind
of conversion
heat
the
p
r
i
n
ciple
solar radiation
into
What
? Explain
energy conversion
system .
tidal
of
fuel
.
energy
Explain the
various methods
of tapping
.
basin
energy
single
geothermal
Compare
principle
advantages
:
cell
.
affect
power plants with
double basin
system
Explain the
basic
various factors
which
the generation of
Bio -Mass .
Describe
its .
the
following
angle
3
4
16
.
.
)
)
)
b
a
b
)
a)
b
on
a
the
plate
surface
horizontal
,
)
on
by
and
15th
located at
plane
(IST
west of south
P.M
tilted
Calculate the angle of
incidence of bear
radiation
45 ° from
30
1:30
are
.
° 4 /
81 4
E
.
72
49E
°
and
.
;
for
directly
of
Compare
of
The standard longitude
18 °54'N
The longitude and
latitude
°
pointing
at
Mumbai
.
Mumbai
of
November
is
respectively
IST
.
of
over flat plate
disadvantages
energy
methods
solar
different
harnessing
List
advantages
and
collectors
concentrating collectors
Derive
.
designs
collector
,
HAWT
liquid
.
for
features
of blades
the efficiency equation
,
their relative
various
flat -plate
Explain
VAWTS and
two -blade
The following data
were recorded
1.226
3
kg/m³
of
a
Contd
.
wind speed at a
standard
8 m /s .
=
10m
free
/G
(El)
height from the ground
density
0.13
height of
Average
α=
Air
Hub
)
EE -745 NCES
(
7
e)
g)
)
Discuss
.
and explain
disadvantages
Define
Declination
azimuth
length
angle
Surface
Hour
Day
2
Solar time
G
)/
and
8
8
7
8
7
h
)
ii
.
.
ii.
i
iv
.
EI
(
80m
v.
vi
NCES
)
=
i.Latude
f)
745
-
a
( E
E
*
5
16
.
)
a)
b
Rotor
.
.
diameter =
Power
wind
in
is
the
half that
turbine
the wind
velocity
60m
.
available
by
turbine
Power
the
on
Axial
the
is
?
stalls
3 km²
during
basin
if
.
it
stops
on
average
turbine
head
the
.
plant
tides ?
energy
.
extracted
power
Axial force on
force
extracted
upstream
Downstream wind
of
tul
iv
When
maximum
and
blade
is
turbine
)
,
no
ext r a c t e d
When
the
of
power
neap
tidal
and
of
...
power
and
source
completely
the
spring
the
the
.
.
6
.
7.
a)
a
b
)
)
EE
Explain
the
technologies
mathematical expression
.
available
an
:
for
MHD
and
with
Ocean Thermal Energy Conversion
for
circuit voltage
-
output
data
having following
power
Calculate the open
maximum
generator
0.25m²
Plate area =
density =
2
:
(
/ s
mho /m
)
for
irrigation
installed
technologies
any two
10
1000
Wb /m²
on
m
electrodes = 0.50 m
Distance between the
Flux
velocity
note
conductivity =
Average gas
Gaseous
Write short
is
minor
system
conversion
distillation
Fuel
Solar
ii.
Bio -Mass
photovoltaic
cell
111.
A
is
of
pumped
9
.
The
through
Each
.
The
.
the
Contd .
and
matrix
mm
×4
125mmx125
silicon
of 25m
24 modules
a depth
The water
.
supplying water for
a developing
needs at a remote place in
country
a bore well from
is
G
)/
in
multicrystalline
PV . array consists
module has 36
(El
size
NCES
)
cell
solar cells arranged
745
-
=
a
)
is
th e
The
the
Calculate
of
0.65
energy
bj
(
8
7
2x4-8
b
What
are
area
tidal
they caused ?
type
-
.
:
generated
only
3m
when
is
has an average range of 10m
cycle
tide
basin
-basin
What
are
single
How
A
The
Power
flood
below
operating
falls
process
.
annual
efficiency
average
-generator
th e
of the plant
4
is
power generated by the plant in a single
filling
turbine
Estimate
G
(
El )/
generation
EE -745 )NCES
(
16
5
a
8
Find
has
available
for
5.
6.
)
ja
the
main
)
particular
a
site
.
7
dynamic
generator
.
/s
.
of
OTEC
(
advantages
Technology
Explain the principle of Ocean
Thermal
are
Energy Conversion
What
SOTEC ?
is
wave energy at a
What
open
principle of
magneto -hydro
the
of such
generation ? Explain basic
operation
Calculate
and
engine
circuit voltage
MHD
of
specifications
2 Wb /m²
plates
= 0.2m²
following
maximum power output
with
Plate area
Distance between
Flux density
m
following
:
10mho /m
Average gas velocity =
1000
the
Conductivity of the
gas
Still
short notes on
Solar
-
Derive an expression
for average
annual
8
Ees
.
:
m
MHD
and
Conversion with
on
an
cuit voltage
for
/s
for
(
b
(
El)/
G
Geothermal Energy
EE 745 ) NCES
(
7.rite
16
number of
( E
E
printed pages-4
16
2016 C
Full
Time
in
Marks
Three
:
100
hours
the margin
the
and
are
1
745
conventional
)
NCES
.
·
and
advantages
a
.
the
of
.
use
.
with
of renewable
Explain
?
of a
works
main
components
wind
1
of
collector ?
basic
classification
principle
? Give
on the basis of axis of
Contd
.
(
EI)
rest
non
5x8 =40
any four from the
marks for the questions
The figures
full
No.
How
cell
the
diagram
are
is
rotation
of wind turbines
energy conversion
What
solar flat plate
What
suitable
PV
sources of energy
?
the
conventional energy sources ?
What are
What
Q.
indicate
NON C
- ONVENTIONAL
ENERGY
Total
.
Answer
1
)
(
a)
(b
(c)
(
d)
SOURCES
ut
ving data
m
0.50
ectrodes =
1000
m
= 10 mho /
)
2x4 = 8
installed
technologies
(
any two
on
is
irrigation
a developing
inor
in
Each
the
The
.
silicon
.
umped through
The
of 25m .
oth
modules
yst a l l i n e
mm and
9x4 matrix
25
.
0.4m
8
7
Cont d
=
10
5
7
8
200
=
4
m²
.
.
(
e)
is
collector
Ocean
biomass
is
.
?
How
it
is
useful
energy
?
?
are the different
and limitations .
ther m a l
its availability
is fuel cell ? What
expressions of
angle
for
.
4
.
(
b)
)
(
a)
(
b
F.
,
100
W
,
in
shaft
following wind
horizontal
of power
/m²
and
maximum power
F
parameters
with following
-10mA
0.24V
cell efficiency
Calculate
=
0.14V
Intensity
type
expression
4cm²
Area =
Derive the
.
propeller
the wind
A
atm and
of
1
diameter
40
efficiency
n =
40%
(
in
)
.
Contd
kW
obtainable power
.
is
at
has
s
/
wind turbine having
Speed of wind 10m
The
turbine
.
15 °C
its
operating speed
120m and
:
maximum
3
axial thrust
the torque
the
G
(
El )/
.
Total power produced
density assuming
the
in the wind
Total power density
Calculate
(i)
(ii)
)
(ii )
(iv
(v)
5
details of a
Explain the constructional
What
flat -plate
(
A)
What
Discuss
What
(
h)
:
.
Solar hour angle
following
the mathematical
cells ?
types of fuel
the
Give
(i
)
Declination
Zenith a n g l e
angle
.
performance
explain the
10
EE 745 )NCES
(
maximu
(ii)
(iii
)
.
a leap year
declination
length
Solar azimuth
in
the
Solar day
(iv)
(v )
Calculate
31
cell
16
charteisc
5
-6.5mA
-
se
Voc
m
=
at
(
g)
)
March
solar
Mathematically
of a
/
G
(EI)
10
In V
rpm
FORAGTISEN
5
a)
(
(
b
(
a)
745 )NCES
E
( E
.
10
2
3
16
2
3
CAMERY
Total
number of
printed
pages -5
.
16 E
( E 745 )
NCES (
EU
)
2018 C
Marks
:
100
Three hours
the margin
indicate
NON -CONVENTIONAL
ENERGY
Full
Time
in
any
is
.
electric
compulsory .
.
data
for
.
with
in
Contd
.
converting
power
for
requirements
India
5x8=40
answers
suitable
your
where
four questions
from
1
for the
questions .
Assume
into
methods
fuel
options
graphs
the
,
required
Justify
are
.
remaining six questions
Attempt
Question No.
marks
SOURCES
the
diagram
future ?
List out
sun energy
the
concerning
What
(iv)
( ii)
i
( i)
i
(i)
full
The figures
:
(a )
Notes
T.
2
Define
transfer
the
concept
basic
coefficient
.
the
heat
its
of wind
explain
of overall
and
principle
power
.
:
surface
incidence
,
of
fuel
which
a
of Biomass
between
following
of
located
of south
The
.
91.7362
.
81 °44'E
E
°
standard
3
4
.
Ja
(
a)
(b )
.
)
Distinguish
to
between
the
radiation
.
Derive
mass
.
global
air
radiation
calculate
dif use
explain
heating
.
the
lift
of
.
,
.
solidity
,
explain the
P - 136
force
diagram
working
of a
and
and chord
drag
angle
:
With the help
terms
HAWT
10m
= 0.13
of
:
,
speed at height
in
the
is
wind
turbine
by the turbine
extracted
power
turbine
is
is
half
ground = 80m
1.226kg/m³
8m /s
Average free wind
a
the
.
velocity
height from the
Air density =
Hub
Rotor diameter
available
wind
Downstream wind
Power
extracted
that of upstream
(
i)
Power
the
the
(ii)
on
and
maximum
on
Axial
When
force
(ii)
Axial force
a)
extracted
and
.
When no power
3
completely
G
(
EU)/
b)
(
(
(iv )
:
two -blade
recorded for a
data were
The following
pitch
,
diagram
of a schematic
With the help
water
solar
formula
and
E
( E
745 )NCES
Find
(
b
8
7
is
tidal
energy ?
advantages
various
factors
difficulties in
of geothermal
the
conversion ?
the
the
.
angle
angle
the
difference
battery ?
the
a
by 45
is
‫کرمان‬
importance
What
energy
are
are
is
and
explain
Declination
length
Surface azimuth
the
°
and
a plate
radiation on
plane
horizontal
from the
Calculate
(iv) Day
(ii)
Solar time
Define and
cell
What
generation
affects the
Explain
developments ?
What
disadvantages
What
)
(
a)
(g)
(e)
(c)
.
e
(
beam
tilted
8
30 ° west
and pointing
on 15th
( ST)
P.M. I
at 1:30
at Guwahati
and latitude
The longitude
IST
16
T
H
H
7
Contd
.
stal s
.
for
respectively
Guwahati
N
°
NCES (El)/G
are
60m
blade
November
of
26.1445
)
longitude
EE 745
(
XB)b
16
2
and
7
Ais
a)
(
What
is
source
range
below
of
tidal
" of
3m
tidal
.
energy ?
tides ?
plant
is
has
Power
tide
power
.
The
10m
.
Calculate
the
is
7
annual
.
-A .
average
particular
and
MHD
8
the
-type
they caused ?
falls
average
efficiency
process of the basin
the
generator
filling
turbine
Estimate
a
for
of the plant
at
expression
energy
an
voltage
for
-circuit
output
:
electrodes
following data
0.25m²
the
7
.
)
(
a)
(
b
Write short notes
on
)
for
.
2x4 =8
any two
(
Thermal energy
storage
:
(i)
in
a
is
a
irrigation
installed
technologies
Hybrid energy
system
is
minor
place
The
from
water
well
has
consists
module
cells
cell
cell size
solar
the
The
silicon
Each
array
bore
.
remote
for
system
Biomass conversion
a
water
photovoltaic
at
a
country
.
The PV
through
.
modules
multicrystalline
.
and
is
50%
/m³
.
/
m³
Calculate
.
Assume
to
density
incident normally
noon when
.
The combined motor
.
125mmx125mm
12%
efficiency
800W
radiation
is
(El
)/
G
of fresh water
as 996kg
the panel
global
the water discharge
rate at
and pump
efficiency is
is
arranged in 9 x 4 matrix
36
of 24
depth of 25m
pumped
developing
needs
supplying
A
(ii)
(ii)
:
What are the
spring and
neap
are
single -basin
How
A
average
has a basin area of
3km²
an
it
generated during flood
cycle only . The
turbine stops operating
when the head
on
a
average power generated
by the plant
in
the
single
if
0.65
an
energy generation
Derive
wave
.
annual
site
power
Calculate the open
maximum
generator having
=
between
Plate area
Distance
= 1000m / s
2Wb /m²
velocity
Flux density =
A v e r a g e gas
m
/
( E 745 )
E
NCES
200
X
A
Gaseous conductivity = 10mho
16
5
0.50m
16 (EE 745 ) NCES (El)/G
4
8
7
=
1
Total
.
2.
(
a)
of
number of
printed
Full
16
pages -3
:
100
(
ME
.
725
.
.
collectors
.
10 + 5
)
NCES
+5 = 20
the efficiency
and
Specify
indicate
five questions
for the questions
the margin
Three hours
Marks
in
Time
figures
marks
plate
Examine
important are biomass
sources in
?
in
world
this
.
.
for
a changing
How
flat
select the losses
that affecting
their advantages
over flat plate collector
Classify the concentrating
collectors
Answer any
full
The
NON CONVENTIONAL ENERGY
SYSTEMS
2018
context of rising
cost of fossil fuels
India
Contd
coniemn
✓
3
/
20
for a family
following data are given
:
the
The
.
= 2
kg
prospects
,
,
dry
is
matter
biogas yield
.
Heat
of burner
0.8
.
.
of Geothermal
the
10 + 10 =20
digester
digester
m³
28MJ /
is
efficiency
methane proportion
,
30 °C
retention time
temperature
cows
for the output
biogas digester suitable
The
,
of five
days
60%
0.24m³/kg
consumed per day
is
is
methane =
of combustion of
:
the
from the
p o w e r available
the volume of biogas
Calculate
(i)
(ii
)
Investigate
10
.
system
.
.
is
which
popular .
Describe
India
context to
energy in
liquid dominated
Binary cycle for
concept of
10 + 10= 20
.
Examine
which
biogas plant
Categorise one
in India
.
to
a
10 + 10= 20
of
of wind
10+ 10 = 20
site
Categorise the
principle
.
selecting the
6
.
)
in
case
✓
short notes
725
.
on
:
Engine
in I.C.
3
plantation
G
/
plant
NCES
)
OTEC
Energy
biogas
Use of
Solar pond
Write
d
(
ME
(
(
c)
b)
(
(
a)
16
'
CA
various parameters
efficient
achieve the
controlled
have to be
for
turbine
working
biogas
production of
the
criteria
wind
horizontal axis
main
.
NCES /G
)
turbine
725
4x5 = 20
200
Illust r a t e
(
ME
2
5.
16
↓
16
followin g
system
:
5x3= 15
energy in
India
impact of
OTEC
Write short
note on
the
)
Environmental
)
Geothermal
( V
P
conversion
system
16
umber of printed pages -8
Marks
:
100
(
ME -725 ) NCEN
Three hours
the margin
and
:
reflects
.
.
10
=
10
the
the
Contd
,
of
1×
is
10%
5%
absorbs
of light transmitted
and
indicate
NON -CONVENTIONAL
ENERGY SYSTEMS
Full
Time
in
%
95
suitably
usual meaning
rest
compulsory and
their
six from
is
for the questions
No. 1
marks
The figures
full
Question
(
a)
85
%
)
may be assumed
have
answer any
e symbols
y missing data
(
b)
90%
answer
giving proper justification
)
plate
correct
(
c
15
%
light
glass
the
a
d)
(
amount
incident
If
Choose
(i
)
2019
(
any three
a)
(
b)
Prospect of
Fuel cells
energy
energy
photovoltaic
Fusion
Solar
Wind
(
WECS
).
200
(e
)
e
( E M
725 )
NCEN /G
8
.
16
M
( E
(
i
)
(
i )
(iv)
The
Aluminium
PV module
is
infrared radiation
parameter
is
to ultraviolet radiation
to
silicon
collecting surface of
Mono
of
)
Transparen t
made
(
a
)
Transparent
-crystalline
(c )
(
b
)
d
(
arise
Once a day
Tides
(
a)
Twice a day
power
following
a day
day
(b )
a
Thrice
the
Four times
,
generate
Salinity
to
OTEC
)
(c)
d
(
In
used
a)
(
Temperature
Density
(
b)
)
2
Pressure
d
(
NCEN /G
)
solar
m²
m²
m²
10kW /m²
3.64kW /
1.36kW /
6.5kW/
of
The value
(
a)
b)
(
)
(c )
(
d
fuel
is
about
which
an instrument
processes takes
constant
cell?
following
of the
in
Electromagnetic
place
(
a)
Electrochemical
is
transfer
Thermionic
(
b)
(
c)
Heat
Beam
radiation
pyranometer
(
d)
A
(
a)
Global
radiation
(
b)
Diffuse
radiation
(
c)
Contd
Duration of bright sunshine
NCEN /G
)
(d )
-725
(vii)
ME
(
(vi) Which
(u)
16
3
(c)
-725
measur
BEARI
.
x)
is
a
part of
devices
energy
collector
source of
energy
system
generator
concentrating
control
Solar
OTEC
Biomass
Wind energy
a
conversion
is
a
source
is
non
different
relative cost considerations
.
and
10
16
3
.
( E
M
Write
a
aspects
is
short
note
on
of harnessing
non
environmental
.
different
which
.
2
60%
=
of
0.8
bio
=5
KW
day
0.398
C
Contd
mass of
at
methane
of dry
28 MJ/m³
unit
for
+8 = 10
affect
digestion ?
resources
,
briefly
factors
meant by anaerobic
conventional energy
What
What are the
digestion ? Explain
Calculate the following
parameters
2½ +2
50kg /m³
°
1-92m²
Volume of biogas digester
=
(i
)
Power available from
digester
:
period=
of cows =
Given data
No.
Retention
Burner efficiency
=
per
combustion
yield
of
Methane proportion
in gas =
Heat
Biogas
whole input =
0.24m³/kg
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725 )
.
ev
STP
[ alifie
Dry matter content
/ day /cow = 2kg
Density of dry matter =
Temperature for fermentation
= 30
20days
(ii)
a biogas system
‫نهمه‬
‫رکھا‬
Yaw
(
a)
(
b)
(
c)
(
d)
Geothermal
Ocean
Sun
( )
a
(
b)
Earth
Wind
)
(c)
(
d
air
storage system
ener g y
,
various
source s
about
Electromagnetic
discuss
energy
storage
Chemical energy
storage system
Electrical energy
Mechanical energy
storage system
Compressed
(
a)
(
b)
)
(c)
(
d
NCEN /G
)
4
and the
methods of extracting energy
from them
conventional
Briefly
system
economies
16 M
( E 725
2.
from
Mike
4
b)
Geometry
the
Hour angle
Declination
.
:
sketch
angle
plate
explain
2x4 =8
collectors
in
can be
and
velocity
that
wind
horizontal
case of
flat
advantages
angle
Solar azimuth
Zenith angle
Radiation
i)
fi )
iv )
Discuss
in
.
over
energy
collectors
solar
,
/s
.
The
it
turbine has
atmospheric
velocity
standard
.
wind
exit
maximum power
Prove that
,
when
of
1
8/27 )pAV³
(
at
10m
operating
2*4= 8
maximum
its
has a
temperature
and 15 °C
of
and
at
the wind
density in
6
.
X.
8
.
(
a
)
M
( E
The
maximum
the
basic
obtainable
axial
kW
)
power
(
in
.
)
.
Ocean
with
O
( TEC
of
thrust
principle
torque and
power produced
40%
assuming n =
total
density
The
'
OTEC
,
Cycle
system
O
' pen
.
'
What
method ?
generation
of each
MHD
(
MHD
are
)
system
are
.
the
10 + 5 = 15
sketch
systems
main
MHD
3 +2=5
an
8
Contd
+2 = 10
power
are the
MHD
What
an
.
a neat
How
Dynamic
principle of Magneto
Explain the basic
Hydro
.
with
classified ?
generation
Describe
/G
of
open cycle system
advantages
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)
generation ?
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b)
a)
limitations
of tidal power
methods
sketches the various
Explain with
advantages over
Cycle
Closed
‘
neat sketch the
Describe with a
its
Conversion
Thermal Energy
Explain
(iv ) The
(iii)
( ii)
‫اکان‬
b)
16
and
neat
With the help of
of Solar
terms in respect
the following
(
a)
turbine
obtained
equals
one -third
Wind
pressure
velocity
120m
40r.p.m.
total power
Calculate :
of
is
diameter
speed
The
efficiency .
(i)
NCEN /G
-725 )
5
10
power
(a )
.
fb
M
( E
6
.
5
16
7
of
and
conetraing
7
is
7
disavntges
stream
.