JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year RENEWABLE ENERGY SOURCES 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
List the advantages of Small hydro power plant.
Answer
Small hydro power plants offer several advantages, including:
- Low environmental impact: They typically require minimal land use and do not involve large-scale reservoir flooding or significant displacement of populations.
- Reliability and longevity: These systems provide a consistent and predictable source of renewable energy with a long operational lifespan and relatively low maintenance costs compared to other renewable technologies.
- Local energy security: They are ideal for remote or off-grid locations, providing decentralized power generation that reduces transmission losses and dependence on fossil fuels.
Explain the process of Photosynthesis.
Answer
Photosynthesis is the biological process by which green plants, algae, and certain bacteria convert light energy into chemical energy. The process primarily occurs in the chloroplasts of plant cells, where the pigment chlorophyll captures solar energy.
The overall chemical reaction is represented as:
The process occurs in two main stages: the light-dependent reactions, where sunlight is absorbed to produce ATP and NADPH, and the light-independent reactions (Calvin cycle), which use these energy carriers to fix atmospheric carbon dioxide into glucose. Oxygen is released as a vital byproduct of this process.
Write the various characteristics of Fuel cell.
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List the various applications of PV system.
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What are the relative features of drag and lift type machines in Windmills.
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Distinguish between Conventional resources and non-conventional sources.
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What is the depletion layer in p – n junction?
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List the different forms of Renewable Energy sources.
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Explain the variation of Wind speed with consideration of height from the ground.
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Give the classification of small hydro Power stations.
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PART - B
Find the tip – speed ratio if a 6 m diameter rotor has rotation of 20 rpm and the wind speed is 4 m/s. What is the implication of tip speed ratio?
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Discuss the aerodynamic considerations in wind mill design in detail.
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Explain Betz model of expanding air stream tube to determine extraction of wind energy by windmill.
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Derive an expression for the total power of a wind stream taking all in to consideration Wind velocity and air density as well.
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List the main considerations for selecting a site for wind generator.
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Explain the variation of output of a wind turbine with tip speed ratio of the rotor.
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Explain the basic components of Tidal Power Plants and give their significance.
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List the advantages and limitations of Small scale Hydroelectric Units.
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Explain the basic components of Small hydroelectric scheme with a layout arrangement.
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Derive an expression for Power generated by a Tidal System.
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List the advantages and limitations of Tidal power generation.
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Explain how the electric power is generated from hydro Power with necessary equations.
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Explain the different types of turbines that are used in Small scale hydroelectric power generation.
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What are the site requirements to construct a Tidal Power Plant?
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Explain the current – voltage characteristics of Fuel Cell and give its Significance.
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What are the advantages and disadvantages of geothermal energy?
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Explain the principle of working of a H2 – O2 fuel cell.
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Explain about dry, wet and Hot water geo thermal systems?
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Explain the process of Single stage gasifier in detail.
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Compare between Geothermal Power plant and Conventional thermal Power plant.
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