KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK

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1 KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING QUESTION BANK SUBJECT CODE & NAME: EE1451-RENEWABLE ENERGY SOURCES YEAR / SEM : IV /VIII UNIT- I ENERGY SCENARIO 1. Mention the non-conventional energy sources available in India. 2. Where the wind energy units are installed in India? 3. What is the energy consumption in India? The per capita energy consumption in India is 150kWh. India, a developing country with 20% of the world s population consumes only 1% of the total energy consumed in the world. 4. What are the primary energy sources? 5. What are secondary energy sources? 6. State 4 non commercial energy sources which are posed for commercialization. 7. List 4 commercial energy sources. 8. List four non commercial energy sources. 9.Define Renewable energy sources. 10. What are the advantages of Renewable energy. 1. Give your opinion on Nuclear energy option for India, indicating its merits and demerits. (16) 2. (a) Comment on the economic visibility of Tidal power plants. (8) (b) Write a note on Economical justification of Geo-thermal plants. (8) 3. What are the unconventional sources of energy? How would you use them for energy supply options? Why is there need to develop these sources? (16) 4. Explain a method to estimate the commercial non commercial and electric energy demand. (16) 5. A survey of energy demand and available resources strongly indicate the necessity for harnessing new untapped sources. Explain one such source and discuss the prospects of its economic utilization. 16) 1

2 6. Consider the newly found natural gas sources for use as new commercial energy sources. Suggest a layout of a power plant or a scheme to make the natural gas as a Commercial source of power. (16) 7. (a) State the availability of fossil fuels and discuss the necessity for harnessing non conventional energy sources. (8) (b) What is meant by total energy installation? Explain with a typical example. (8) 8. How wind energy can be converted to a commercial source of energy explain with an example of the system. (16) 9. (a) What are the prospects of non-conventional energy sources in India? Explain. (8) (b) Name and explain briefly the various sources of conventional energy. (8) 10. Discus briefly renewable energy sources. Explain their availability. Economics and efficiency with reference to India context. (16) 11.(a) State the different non-conventional energy sources in India. Write briefly on economics of these sources. (8) (b) Describe the pattern of energy consumption ad growth in energy consumption in India during the last ten years. (8) UNIT-II SOLAR ENERGY 1. State the different types of solar collectors. 2. What is meant by Beam radiation? 3. What is diffuse radiation? 4. What are the applications of solar air heaters? 5. What are the two solar power generation systems? 6. What are the components of PV cell? 7. What are the advantages of PV energy conversion? 8. List the advantages of flat plate collectors. 9. List the applications of solar energy. 10. What is solar constant? 11. State two types of solar radiation measuring instruments. 12. List the types of concentrating collectors. 1. Write a note on thermal losses and efficiency of a flat plate collector. (16) 2. (a) Draw a sketch of a solar drier for high moisture paddy and explain (8) (b) What are optical losses? (8) 3. Explain the principle and operation of a solar collector (16) 4. (a) Write about solar cooling. (8) (b) Explain any one solar energy application. (8) 2

3 5. Explain with a diagram the working of a solar energy Air preheated for a tea processing industry. How will you compute the quantity of heat supplied to the air? (16) 6. Give a schematic diagram for a solar powered pump deriving its energy from a photo voltaic array. Provide a back up storage battery in your circuit. (16) 7. Explain a typical focusing type solar collector with sun tracking mechanism. List the advantages and disadvantages. (16) 8. Explain with a neat sketch the working of solar hot water system with a standby electric heating and storage tank for domestic use. (16) 9. (a) Explain the working of any one liquid flat plate solar collector with a neat diagram. (8) (b) What is the principle of solar photovoltaic power generation? (8) 10. (a) List the advantages, disadvantages and areas of application of solar energy. (8) (b) Explain power concept of solar power generation. (8) 11.(a)Explain any two principles of solar energy collection. Draw sketches of any two types of solar collectors and explain the operation of these collectors. (8) (b) Draw sketches illustrating solar cooling and solar power generation. Explain the operation of these devices (8) UNIT- III WIND ENERGY 1. Give the formula for finding out the wind power. 2. What are the advantages of wind energy? 3. What is the advantage of savonius rotor? 4. Write the characteristics of a good wind power site. 5. What are the main parts of a wind mill? 6. Why wind turbines are installed on high towers? 7. What is the functional relationship between wind energy and wind velocity? 8. Give the disadvantages of wind power. 9. What are the two broad classifications of WEC systems? 10. What is theoretical maximum efficiency of a wind machine? 1. Draw a sketch of a horizontal axis single blade wind mill with details of transmission system and explain its working. (16) 2. (a) Write a short note on potential of wind power in India. (8) 3. (b) How will you determine the efficiency of a wind mill? (8) 4. Explain preliminary design of wind electro system. (16) 5. Explain preliminary design of wind elector system (16) 3

4 6. Explain the working of a horizontal axis wind turbine driven generator with a diagram. Show the mechanism for the automatic reorientation of the turbine axis along the wind direction. (16) 7. (a) Derive the relationship between wind power and the free steam wind velocity. (8) (b) Sketch a typical savories vertical axis rotor and explain its salient features. (8) 8. Sketch the speed and power characteristics of wind turbines of the vertical axis and horizontal axis with differential blade numbers. (16) 9. Wind turbines driving induction generators are widely used. Give a schematic layout and indicate how the various parameters like frequency voltage, excitation, cut in and cut out at extreme wind velocities are monitored while the generator is supplying to the state power grid. (16) 10. Describe with a neat sketch the working of a wind energy conversion system (WECS) with its main components. (16) 11. (a) Explain the principle of electric power generation from wind mill. (8) (b) Discuss its types and components. Also indicate the best site for locating them. (8) 12. (a) Draw sketches illustrating the constructional features of horizontal axis type of wind mill and explain the operation of this device. Why is the blade twisted? (8) (b) Explain the operating principle of vertical axis type of wind mill with relevant Sketches. What are the merits of this over horizontal axis type of wind mill? (8) UNIT-IV OTHER ENERGY SOURCES 1. What is meant by tidal range? 2. State the tidal systems in operation. 3. What are the kinds of geothermal sources? 4. Name the turbine used in Tidal Power Station? 5. What is a tide? 6. State the principle of operation of geothermal energy. 7. Give two methods of tidal power generation. 8. What is bio mass? 9. What is the principle of Tidal energy plants? 10. When do the peak tides occur? 11. What are the factors which affect bio digestion? 12. What are the main components of a geo-thermal power plant? 13. State different types of bio-gas plants. 4

5 1. Describe a binary cycle system for liquid dominated geo thermal energy with a neat sketch. (16) 2. (a) State the classifications of Tidal power plants. (8) (b) Sketch a typical geothermal field and explain. (8) 3. (a) What is meant by anaerobic digestion? (8) (b) What are the factors to be considered in the design of Digesters? (8) 4. Describe with a neat sketch the systems for extracting energy form the agricultural waste. (16) 5. Explain the working of a Tidal power plant and the two way operating cycle for its units. (16) 6. Explain the principle and operation of bulb type power plant. State the characteristics. (16) 7. Explain the working of a bio gas plant. (16) 8. How do we get energy from the various types of waste? (16) 9. Explain with a figure the working of a double basin type tidal power plant. List the merits. (16) 10. (a) Explain the depressurized system of energy conversion. (8) (b) What are the limitations of geothermal power? (8) 11. (a) Write about mechanical segregation of municipal wastes. (8) (b) Sketch a waste incineration plant with a provision for extracting the heat Produced using a thermo fluid system. (8) 12. Sketch and describe any one type of Bio-mass gas generation plant. Mention 4 uses of the bio-gas produced. (16) 13. Sketch two types of tidal power generation plants and explain theory working.(16) 14. (a) Explain the depressurized system of energy conversion. (8) (b) List the advantages and disadvantages of tidal power plant. (8) 15. Explain with a diagram the working of a constant pressure bio-mass digester plant. (16) 16. Explain with a sketch working of a waste incineration plant for using municipal wastes. Include a waster segregation unit in your scheme. (16) 17. Explain the theory of geothermal energy. Draw the layout of a geothermal power plant and explain its operation. (16) 18. Explain in detail the principle and working of tidal power generation. What are its merits and demerits? (16) 19. (a) Name the various models of biogas plant. (8) (b) What are the main problems in straw fermentation? (8) 20. (a) What is meant by energy plantation? What are its advantages and disadvantages? (8) (b) Write brief note on Energy from agricultural wastes (8) 21. (a) Draw schematic diagram of a wave power plant and explain its operation. State the merits and limitations of this plant. (8) (b) Explain the operating principle of a geo-thermal power plant with relevant sketches. (8) 5

6 22. (a) State the basic principle of operation of bio-gas plant an explain the operation of a commercial type of bio-gas plant with relevant sketches state three applications of this plant. (8) (b) What is meant by municipal waste with reference to power generation? Describe the operation of a power plant based on municipal waste. Draw relevant sketches. (8) UNIT-V ENERGY STORAGE AND HYBRID SYSTEM CONFIGURATIONS 1. List some applications of fuel cells. 2. List types of fuel cells. 3. What are the main components of fuel cell? 4. What do you meant by flywheel energy storage? 5. List out different methods of energy storage. 6. Give the classification of batteries. 7. Define energy efficiency. 8. Define cycle life of the battery. 9. What do you meant by power capacity? 10. What is specific power? 1 Explain the performance characteristics of battery and its equivalent circuit. (16) 2. Explain the procedure for designing a battery. (16) 3. Explain energy storage using flywheels. (16) 4. Explain fuel cell energy storage. (16) 5 Explain storage systems using ultra capacitors. *********************** 6