8/12/2019 Second Class Test
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Mid Term Test
Remote Area Power Supply: MIET2009
STUDENT NAME
_________________________________________________
STUDENT NUMBER
______________________________________________
Subject Details
Course code: MIET2009Course name: Remote Area Power Supply
SystemsLecturer: Prof. Aliakbar AkbarzadehDate of exam: May 18,
2011Time of exam: 13:30 am to 15:00 amDuration of exam: 1.5
hours
Allowable Materials and Instructions to Candidates:
1. Write your full name and student number on each examination
booklet together with thenumber of examination books used. Students
must not write during reading time.
2. The examination paper contains 7 questions.3. Attempt
allquestions and all parts of the chosen questions. Carry out the
instructions on
the front cover of the examination booklet.
4. The Exam is CLOSED book and CLOSED notes.5. Please do not
take the papers apart.
8/12/2019 Second Class Test
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REMOTE AREA POWER SUPPLY SYSTEMS: MIET 2009
Questions
1. A photovoltaic system for a certain house after supplying the
day time load, the surpluselectrical energy available is 6.76 kWh.
Considering a PEM electrolyser with an energyconversion efficiency
(based of the high heating value of hydrogen - HHV) of 87%, asystem
for storing hydrogen at atmospheric pressure (assume no losses),
and a PEM fuelcell with an energy conversion efficiency (based on
HHV) of 60%.
a.Calculate the total amount hydrogen produced by the surplus
electricity available inkg.
b.Will the amount of hydrogen be enough to meet the night time
load of 3.40 kWh?
(10 Marks)2. In a remote homestead near Alice Springs the
following electric appliances are used:
a.Four 60W lights 3 hours per dayb.One TV set (300W) 5 hours per
dayc.One 80W water pump 1 hour per dayd.One 300W refrigerator 4
hours per day
Design a stand alone power supply system based on photovoltaic
as well as auxiliary petrolgenerator. Provide schematic clearly
indentifying the components and their arrangement. Sizethe system
according to the load and determine the following:
a. Calculate the daily electrical energy loadb. Calculate the
number of panels requiredc. Determine the battery storage system
for two days storage. (35Marks)
3. Describe the principle of a salinity gradient solar pond. Use
a diagram to indentify zonesand the importance of each region. Give
also approximate dimensions where applicable.
(10 Marks)
4. Hot water is supplied to a house by an off-peak electric
water heating system (5c/kWh). Itis proposed to retrofit a solar
heating unit to the present system. The solar water heatingsystem
is composed of 4m2of solar collector with efficiency of 50% costs
$1800.Assuming the yearly average solar radiation of 17.5
MJ/m2-day. Calculate the simple
payback period for such system.(15 Marks)
5. Describe briefly with a sketch a heating and cooling system
for a building using ground asa heat source or heat sink. Identify
the key components of the system.
(10 Marks)6. If you were looking towards the sun at 11:00am in
Melbourne today, at what angle would
you have seen it with respect to horizon?(10 Marks)
7. On the I-V curve of a photovoltaic module show the effect of
variation of solar radiation.(10 Marks)
