Gujarat Technological UniversitySummer 2025 examination

GTU 2181910 Renewable Energy Engineering Summer 2025 Question Paper & PDF

B.E. · Mechanical Engineering · Semester 8 · Subject code 2181910
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 PM – 1:00 PM
Questions
5 with internal choice
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Q.1

14 Marks
(a)
3 marks
Define the following terms:
1)Solar Altitude Angle
2)Declination Angle
3)Hour Angle
(b)
4 marks
State the advantage and limitation of Renewable Energy.
(c)
7 marks
State the principle of Ocean Thermal Energy Conversion (OTEC).

Describe the working of open cycle OTEC system with schematic diagram.

Q.2

14 Marks
(a)
3 marks
What is solar cell? State its working principle.
(b)
4 marks
Explain basic principle of wind energy conversion.
(c)
7 marks

Derive an equation for maximum power, maximum torque, and maximum axial thrust available from wind turbine. What is optimum velocity?

(c)
7 marks

Explain Construction & working of Floating drum type biogas plant with neat sketch.

Q.3

14 Marks
(a)
3 marks
Explain site selection criteria of Wind farms.
(b)
4 marks
Explain concept of solar constant and air mass.
(c)
7 marks

List the instruments used for measurement of solar radiation intensity. Explain any one with neat sketch.

(a)
3 marks
Define
1)Cumulative saving,
2)Life cycle saving,
3)Annual saving
(b)
4 marks

Give comparison between flat plate liquid collector and flat plate air collector

(c)
7 marks

State the objectives of clean development mechanism. Explain clean development mechanism project cycle with flow diagram.

Q.4

14 Marks
(a)
3 marks
Discuss working of solar pond with help of neat sketch.
(b)
4 marks
Write brief note on characteristic curves of wind machines.
(c)
7 marks

Explain construction and working of Pyranometer with schematic diagram.

(a)
3 marks

What are the functions of Yaw control and Pitch control mechanisms in wind turbine?

(b)
4 marks
Discuss the different heat losses occur in Flate plate collector.
(c)
7 marks
Discuss problems in operating large wind power generation.

Q.5

14 Marks
(a)
3 marks
State working principle and components of MHD generator.
(b)
4 marks

Explain methods of improving thermal performance of box type solar cookers.

(c)
7 marks
Derive an expression for cumulative savings with usual notations.
(a)
3 marks

Explain the method of simple payback period. What are the limitations of it?

(b)
4 marks
Enlist the advantages and applications of Geothermal energy.
(c)
7 marks
Explain in brief, “Sunshine recorder”.

Other Semester 8 subjects

BE Mechanical

2181916
Energy Conservation and Management

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About this paper

Official Gujarat Technological University (GTU) examination paper for Renewable Energy Engineering (Summer 2025, B.E. · Mechanical Engineering, Sem 8). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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