INE2601/201
Assignment 1
1. Which of the following is a non-renewable energy resource?
a) Solar
b) Methane
c) Hydroelectricity
d) Coal
2. What is the leading source of energy used in South Africa today?
a) Coal
b) Oil resources
c) Natural gas
d) Nuclear power
3. Which of the following energy sources does not produce carbon dioxide?
a) Oil
b) Uranium
c) Coal
d) Natural gas
4. How many nuclear power plants are there in South Africa?
a) 1
b) 10
c) 2
d) 20
5. What type of energy is derived from heated water?
a) Solar energy
b) Geothermal energy
c) Hydroelectric energy
d) Nuclear energy
6. What type of energy is derived from the sun’s radiation?
EAE3701/201/3/2020
a) Solar energy
b) Geothermal energy
c) Hydroelectric energy
d) Nuclear energy
7. A Solar cell is an electrical device that converts the energy of light directly into electricity
by the ____________?
a) Photovoltaic effect
b) Chemical effect
c) Atmospheric effect
d) Physical effect
8. In hydroelectric power, what is necessary for the production of power throughout the
year?
a) Dams filled with water
b) High amount of air
c) High intense sunlight
d) Nuclear power
9. The main composition of biogas is _______________
a) Methane
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
10. The main composition of biogas is _______________
a) High pollution
b) Available only in few places
c) High running cost
d) Unreliable supply
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INE2601/201
Assignment 2
Question 1
1.
List 3 examples of conventional energy
(3)
1.2
List 3 examples of non-conventional energy
(3)
1.3
What are the disadvantages associated with fossil fuels usage
(3)
1.4
What are the advantages of renewable energy
(3)
1.5
What are the disadvantages of renewable energy
(3)
[15]
Question 2
2.1
2.2
Determine the irradiance for the year 2020
(3)
Determine the conversion efficiency of a 360 W Polycrystal PV module with the following
parameters
(4)
Voc = 45,6 V
Vsc = 36,3 V
Ioc = 8,53 A
Isc = 8,99 A
FF = 0,8
[7]
Question 3
3.1
3.2
Explain how Photovoltaic (PV) system operates to generate usable energy
Draw a fully labelled graph showing power curve for a PV module with charging ranges
for PWM controller
3.3
(6)
(8)
Show by a means of block diagram how to choose the right charge controller for a
PV system
(16)
[30]
Question 4
4.1
How does wind turbine work?
(4)
4.2
A wind turbine travels with the speed is 10 m/s and has a blade radius of 20 m.
EAE3701/201/3/2020
Determine the wind power
4.3
(4)
Use the following data to calculate power converted from the wind into rotational energy
in the turbine
(4)
Blade length (l) = 52 m
Wind speed (V) = 12 m/s
Power Coefficient (Cp) = 0,4
[12]
Question 5
5.1
List 6 sources of Biomass
(6)
5.2
Based on SWOT analysis method, assess the STRENGTH of Biomass energy in
South Africa
5.3
(12)
Explain how electricity is generated in hydroelectric power station and the types of
energy involved during the process
5.4
(8)
Calculate the average power in kW that can be generated in the hydroelectric power
station from the following data
Catchment area = 5x109 m2;
Mean head (H) = 30 m
Annual rain fall (F) = 1,25 m;
Yield factor (K) = 80 %
Overall efficiency (ηoverall) = 70 %
If the load factor is 40 %, what is the rating of generators installed?
(10)
[36]
Total
[100]
© Unisa
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