JNTU
JNTU B.Tech III NON CONVENTIONAL ENERGY SOURCES Previous Question Paper (February - 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 out the applications of solar energy.
Answer
Solar energy is utilized across various sectors through thermal and photovoltaic conversion. Key applications include:
- Solar Water Heating: Domestic and industrial water heating using flat plate or evacuated tube collectors.
- Photovoltaic Power Generation: Generating electricity for residential, commercial, and grid-connected solar farms.
- Solar Drying: Agricultural applications for drying crops and food products.
- Solar Distillation: Desalination of brackish or seawater to produce potable water.
- Solar Cooking: Using solar cookers for food preparation in off-grid or rural areas.
- Solar Pumping: Operating irrigation pumps for agricultural water supply.
Why do use pyranometer?
Answer
A pyranometer is used to measure the total solar irradiance on a planar surface, specifically the sum of direct beam radiation and diffuse sky radiation. It is essential in solar energy applications for assessing the performance of photovoltaic systems, determining the solar potential of a site, and conducting meteorological research. By providing accurate data on the intensity of solar energy received per unit area, it enables the precise calculation of energy conversion efficiency and the optimization of solar collector orientation.
Give classifications of solar collector.
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What is meant by solar green house?
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Classify different wind turbine rotors.
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Explain what is meant by tip speed ratio.
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Comment on the origin of geothermal energy.
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What are the different types of chulhas for rural energy needs?
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Explain the principle of energy extraction from OTEC systems.
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Compare and contrast different types of tides.
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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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Discuss the criteria for assessing the potential of Non-Conventional Energy Sources.
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Classify renewable energy sources? Explain in brief the need of these energy sources with special reference to India. Also compare them.
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Discuss how the concentrating collectors are advantageous over flat plate collectors.
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Give a brief account of thermal analysis of a flat plate collector.
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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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Explain the advantages and limitations of wind energy conversion systems.
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Derive the expression for power developed due to wind.
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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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What are the various components of a horizontal axis wind turbine explain?
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What is the current status of geothermal energy in India.
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Describe various energy extraction technologies used with geothermal resources.
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Explain with the schematic diagram the working of anaerobic digestion showing input material and effluents.
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Describe the working of floating dome type biogas plant and state its advantages.
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Describe the open cycle OTEC power plant and give the status of OTEC plants in India.
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Show that wave power is directly proportional to the square of amplitude and inversely proportional to the period of wave.
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Draw the line diagram and explain the working of hybrid OTEC cycle.
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Explain the working of single basin tidal power plant.
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