JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV RENEWABLE ENERGY SOURCES Previous Question Paper (May - 2019 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
PART - A
How is solar radiation reaching the earth?
Answer
Solar radiation reaches the earth in the form of electromagnetic waves, primarily as shortwave radiation including ultraviolet, visible light, and infrared rays, after traveling through space and the earth's atmosphere.
Distinguish between Global Radiation and Diffuse Radiation. Which is applicable during cloudy atmosphere?
Answer
Global radiation is the total solar radiation received on a horizontal surface, comprising both direct (beam) and diffuse components. Diffuse radiation is the solar radiation received from the sky after being scattered by atmospheric constituents like clouds and dust. During a cloudy atmosphere, diffuse radiation is the primary component reaching the surface as direct sunlight is blocked.
Compare focusing collectors with flat plate collectors.
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Explain the reasoning for deciding the orientation of a flat plate solar collector.
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Explain the formation of winds giving out its potential.
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What is anaerobic digestion?
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What are the different types of geothermal resources?
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Explain the principle of energy extraction from OTEC systems.
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Explain thermoelectric phenomenon.
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What is the principle of energy conversion in fuel cell?
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PART - B
Highlight the energy potential associated with any three types of renewable energy resources with examples.
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Explain the working principle of sunshine recorder with a sketch.
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Explain the need for determining the solar radiation on tilted surfaces.
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Explain the methods of measuring solar radiation.
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Explain with constructional features of solar flat plate collector for efficient conversion.
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What is the need for inclination of flat plate collectors, while concentrators are fixed horizontally?
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Compare the performance of solar air heaters with water heating systems.
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Describe the working of a concentration gradient solar pond.
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Discuss the energy potential from wind in the context of India. Where can wind turbines be installed?
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Discuss with sketch the working of a fixed dome biogas plant.
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What are the advantages of biomass conversion into biogas? Discuss.
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What are the various components of a horizontal axis wind turbine explain?
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Discuss the potential of geothermal resource in the world, bringing out the salient points for energy conversion in India.
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Explain the process of energy conversion from oceans.
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Explain the process of energy conversion from dry rock geothermal resource.
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How does the oscillating wave column convert energy into mechanical form?
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Describe MHD closed cycle system, with its advantages and disadvantages.
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Describe briefly the working of a thermoelectric generator.
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Explain the principles of direct energy conversion with examples.
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What are the advantages and limitations of fuel cells over other direct energy conversion systems?
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