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Semester: Spring-2020 Final Exam Section: ME0120-Course Code: Course Title: Course Teacher: Time: 2:00 Hours Total Marks: 40

This document is the final exam for the course ME409 Renewable Energy taught in the spring 2020 semester at the Department of Mechanical Engineering. The exam contains 4 questions assessing various topics related to renewable energy sources including solar, biomass, geothermal, and fuel cells. It will be 2 hours long and worth a total of 40 marks. No electronic devices are allowed except for calculators.

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Ehsanul Azim
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56 views2 pages

Semester: Spring-2020 Final Exam Section: ME0120-Course Code: Course Title: Course Teacher: Time: 2:00 Hours Total Marks: 40

This document is the final exam for the course ME409 Renewable Energy taught in the spring 2020 semester at the Department of Mechanical Engineering. The exam contains 4 questions assessing various topics related to renewable energy sources including solar, biomass, geothermal, and fuel cells. It will be 2 hours long and worth a total of 40 marks. No electronic devices are allowed except for calculators.

Uploaded by

Ehsanul Azim
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Faculty of Science & Engineering

Department of Mechanical Engineering


Semester: Spring-2020
FINAL EXAM
Section: ME0120-ROYGANJ
Course Code: ME409
Course Title: Renewable Enrgy
Course Teacher:Ehsanul Azim
Time: 2:00 Hours Total Marks: 40
There are total of Four (4) questions.
The figures in the margin indicate full marks.
No electronic device (except calculator) is allowed in the examination hall.

1.a) Describe two types of solar thermal power plants. (5+5)


b) dentify whether the following statements are true or false. If true mention “T” while for false it should
be “F”
i) Phosphorous is the most commonly used material for solar cells.
ii) One solar cell produces 0.5 Volt DC voltages.
iii) A charge controller cannot be used to power DC equipment with solar panels.
iv) Solar inverters have special functions adapted for use with PV arrays, including minimum power
point tracking
v) In grid connected system power is fed into the grid during day time and taking power from the
grid during night.

. a)Differentiate between PEMFC and SOFC (6)+(4)


b) Describe closed OTEC system.

3. a) Fill in the gaps: (4+6)


i) Biogas means a gas formed by _ and _ from breakdown of organic materials such as manure
ii) The main components of biomass are _ & _
iii)Biomass challenge is not_, but sustainable management, conversion and delivery to the
market.
iv) Biomass is _ Neutral.
b)Describe Gasification Vs Direct Combustion.

4. a)Explain working principle of FBC. (5+5)


b)Fill in the gaps:
i) There are _ main ways of tapping geothermal energy.
ii)There are _ types of power plant that can convert geothermal energy to electricity,
depending on the temperature of the geothermal fluid used.
iii)Binary and Hot Dry Rock plants have no _ emission at all.
iv)Geothermal production of energy is _ highest among renewable energies.
v) Extracting large amounts of water can cause land subsidence, and this can lead to an increase
in seismic activity. To prevented this the cooled water must be injected back into the reserve
in order to keep the water pressure _underground.

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