Code No. N0222 /R07 IV B.Tech. I Semester Regular Examinations, November, 2010 1. (a) Explain various sources of energy briefly. (b) Discuss the solar radiation on Tilted surfaces. 2. Enumerate the different types of concentrating type collectors. 3. With the help of a neat sketch, describe a solar heating system using water heating solar collectors. What are the advantages and disadvantages of this method? 4. What are the main applications of a solar pond? Describe briefly. 5. Describe with a neat sketch the working of a wind energy system (WECS) with main components. 6. What is meant by anaerobic digestion? What are the factors, which affect biodigestion? Explain briefly. 7. What do you understand by Geothermal energy? Explain various methods of harnessing the energy. 8. Write short notes on the following (a) Tidal Energy (b) Need for DEC Set No.1

Code No. N0222 /R07 Set No. 2 IV B.Tech I Semester Regular Examinations, November, 2010 1. (a) Explain the Role and potential of new and renewable Energy Sources. (b) Explain Beam and Diffuse Solar radiation. 2. (a) What are the main Components of a flat-plate solar collector? Explain the function of each. (b) Explain the Advanced Collectors. 3. Describe in brief the different energy storage methods used in the solar system. 4. (a) Discuss the Solar Distillation process. (b) What are the advantages and disadvantages of PV solar energy conversion? 5. (a) Describe the main considerations in selecting a site for wind generators. (b) What are the advantages of vertical axis machines over horizontal type? 6. How Biomass Conversion takes place? Explain the Process photosynthesis. What are the conditions, which are necessary for it? 7. Define a Geothermal source and classify Geothermal sources. Discuss its potential in India. 8. Write short notes on the following. (a) Mini Hydel power plants (b) Fuel Cells.

Code No. N0222 /R07 Set No. 3 IV B.Tech. I Semester Regular Examinations, November, 2010 1. (a) Discuss the working of Pyranometer. (b) Define the terms i) Altitude angle ii) Incident angle iii) Zenith angle and iv) Solar azimuth angle 2. (a) Define the terms i) Solar Altitude angle ii) Incident angle iii) Zenith angle and iv) Hour angle (b) Discuss the advantages and disadvantages of concentrating collectors over flat plate type collectors. 3. Classify the methods of solar energy storage Describe thermal energy storage system. 4. What is the Principle of solar photovoltaic power generation? What are the main elements of a pv system? 5. What is the basic principle of wind energy conversion and derive the expression for power developed due to wind. 1 of 2

Code No. N0222 /R07 Set No. 3 6. Calculate: i) The volume of a biogas digester suitable for the output of four cows, and ii) The power available from the digester. Retention time is 20 days, temperature 30 0 C, dry matter consumed 2kg/day, biogas yield 0.24 m 3 per kg. Burner efficiency is 60%, methane proportion is 0.8, Hm, the heat of combustion of methane may be assumed to be 28 MJ/m 3 at STP. 7. (a) How biomass conversion takes place? Explain. (b) Discuss the Geothermal energy Resources in India. 8. (a) Draw a neat layout diagram of a typical OTEC plant showing salient features and explain the principle of operation. (b) Discuss the principle of MHD generation. 2 of 2

Code No. N0222 /R07 Set No. 4 IV B.Tech I Semester Regular Examinations, November, 2010 Time : 3 hours Max. Marks: 80 1. (a) How the solar radiation can be estimated at a particular location? (b) Discuss the differences between a pyroheliometer and a pyranometer. 2. Why orientation is needed in concentrating type collectors? Describe the different methods of sun tracking. 3. Enumerate the different main applications of solar energy. Describe a hot water supply system. 4. (a) Discuss the method of sensible heat storage. (b) Describe the layout and working of a continuous solar cooling system. 5. Discuss the advantages and disadvantages of horizontal and vertical axis windmill. What methods are used to overcome the fluctuating power generation of wind mill? 6. How are biogas plants classified? Explain them briefly. 7. Explain the principle of working of Geothermal power plants and discuss the difficulties and disadvantages of geothermal energy for generation of electricity. 8. Discuss briefly on the following (a) Tidal power generation (b) Economic aspects of MHD power generation.