JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year RENEWABLE ENERGY SOURCES Previous Question Paper (November/December - 2018 - R16)
Note: This question paper contains two parts A and B. 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 and may have a, b, c as sub questions.
Part A
Discuss different Renewable sources of energy with special reference to Indian Context.
Answer
Renewable energy sources in India include solar, wind, biomass, small hydro, and geothermal energy. India has significant solar potential due to its tropical location, extensive wind corridors in coastal states like Tamil Nadu and Gujarat, and a vast agricultural base supporting biomass energy. The government promotes these through initiatives like the National Solar Mission to ensure energy security and reduce carbon emissions.
What is a fuel cell? What are its main advantages?
Answer
A fuel cell is an electrochemical device that converts the chemical energy of a fuel (typically hydrogen) and an oxidant directly into electrical energy through redox reactions. Its main advantages include high efficiency, silent operation, minimal moving parts, and zero or low emissions, as the primary byproduct is water.
Comment on origin and distribution of Geothermal Energy.
Answer
Sign in to view the complete answer paper.
Explain various design of blades of HAWT and their relative features.
Answer
Sign in to view the complete answer paper.
What are the factors causing winds?
Answer
Sign in to view the complete answer paper.
Describe the principle behind the operation MHD generator and mention the advantages of MHD system.
Answer
Sign in to view the complete answer paper.
What do you understand by Energy Farming?
Answer
Sign in to view the complete answer paper.
Describe the various methods of storage of hydrogen.
Answer
Sign in to view the complete answer paper.
List the general principles of Energy Conservation.
Answer
Sign in to view the complete answer paper.
What are the environmental concerns of geo thermal energy?
Answer
Sign in to view the complete answer paper.
Part B
Explain in brief about various types of Geothermal Resources.
Answer
Sign in to view the complete answer paper.
What are the main problems associated with the usage of salt hydrates as Phase Change materials.
Answer
Sign in to view the complete answer paper.
Define beam, global and diffused radiation. Derive an expression for total Radiation on inclined surface. Show that horizontal surface receives no ground reflected radiation.
Answer
Sign in to view the complete answer paper.
Describe the Thermal Energy storage of a solar system.
Answer
Sign in to view the complete answer paper.
What is the present state of Development in Fuel cells? Comment on Environmental effects of Fuel cells.
Answer
Sign in to view the complete answer paper.
With the help of a schematic diagram, explain the operation of close cycle MHD generating system.
Answer
Sign in to view the complete answer paper.
Describe the various characteristics and applications of wind turbines.
Answer
Sign in to view the complete answer paper.
Calculate the volume of cow-dung based bio-gas plant required for cooking needs of a family of five adults and lightening needs with two 100 CP lamps for three Hours daily. Also calculate the required number of cows to feed the plant. Assume the standard values of data values.
Answer
Sign in to view the complete answer paper.
Calculate the volume of Fixed-dome type Bio gas digester for the output of two cows. Also calculate the thermal power available from biogas. Given: Retention time = 40 days, Dry matter produced = 2 Kg/day/cow, Biogas Yield = 0.22 m3/kg, Dry matter = 18%, Density of slurry = 1090 kg/m3, Burner Efficiency = 60%, Heating value = 23 MJ/m3.
Answer
Sign in to view the complete answer paper.
A deep ocean wave of 2.5 m peak to peak appears at a period of 10 s. Find the wavelength, phase velocity and power associated with the wave. At this power rate, what is the average annual wave energy in MWh/m.
Answer
Sign in to view the complete answer paper.
Explain the present status of development of Ocean energy resources.
Answer
Sign in to view the complete answer paper.
A single basin type tidal power plant has a basin area of 2 km2. The tide has an average range of 13 m. Power is generated only during the ebb cycle. The turbine stops working when the head on it falls below 3 m. Calculate the average power generated by the plant in single emptying process if the turbine generator efficiency is 0.7. Estimate the average annual energy generation.
Answer
Sign in to view the complete answer paper.