JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III NONCONVENTIONAL POWER GENERATION Previous Question Paper (July/August - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
How the performance and efficiency at high temperature of a flat plate collector can be improved? Suggest two methods.
Answer
The performance and efficiency of a flat plate collector at high temperatures can be improved by: 1) Using selective coatings on the absorber plate to increase solar absorptivity while minimizing infrared emissivity, and 2) Employing double or triple glazing to reduce convective and radiative heat losses.
What is solar spectrum? Explain in brief.
Answer
The solar spectrum refers to the entire range of electromagnetic radiation emitted by the sun. It spans from high-energy gamma rays and X-rays to ultraviolet (UV), visible light, and infrared (IR) radiation. The spectrum is typically divided into three regions: UV (below 0.4 μm), visible (0.4–0.7 μm), and IR (above 0.7 μm).
Draw equivalent circuit of a solar cell. Write equation of current.
Answer
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Write about circuit characteristics of p-ν cell.
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What are the two extreme theoretical conditions of operation of wind turbine?
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Calculate the possible maximum axial thrust per unit area of rotor for a wind turbine in a 20 m/s wind. If the Danish standard for axial thrust design is 300 N/m2 of rotor area, what is the minimum possible wind speed that this corresponds to?
Answer
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What is Aerobic digestion?
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What are the factors affecting the generation of biogas?
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Define OTEC.
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What are the complications in obtaining maximum potential power of a tidal range system?
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Part B
Discuss in brief about Extra-terrestrial solar radiation.
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Discuss social and environmental aspects of solar water heating.
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Write short note on Solar Ponds.
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Explain parabolic bowl concentrator.
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How can the working of cell efficiency be maximized?
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Explain solar thermo electric conversion principle.
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What are the characteristics of photovoltaic modules?
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Explain MPPT method.
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Discuss various wind turbines.
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Write some application of harnessing mechanical power from wind.
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Explain aerodynamics of wind turbine.
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Explain Betz limit.
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Discuss bio-fuel classification in detail.
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Give the classification of bio-gas plants. Explain their working.
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Explain:
Geo-pressure resources
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Magma resources.
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Write short note on power extraction from waves.
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What are the principles of OTEC?
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Explain various types of fuel cells.
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Explain the operation of a fuel cell.
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