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2003 Course Energy Conservation (Elective I)

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Total No. of Questions : 12] [Total No. of Pages : 3 [3664] - 278 P 1383 B.E. (Chemical) I ENERGY CONSERVATION (2003 Course) (Elective - I) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer any 3 questions from each section. 2) Neat diagrams must be drawn wherever necessary. SECTION - I Q1) a) b) Explain different non-conventional sources of energy and discuss their advantages and disadvantages. [8] Explain the principle and applications of the following energy sources : i) Geothermal Energy. ii) Wave and tidal energy. [10] OR Q2) a) b) Q3) a) Calculate the useful gain, exit fluid temperature and collection efficiency for a cylindrical parabolic concentrator system of 2m width and 8m length. The absorbing cylinder has a diameter of 6cm and the transparent cover has a diameter of 9cm and optical properties are estimated as, = 0.85, ( . ) = 0.77, = 0.94 Heat transfer coefficient from fluid inside to surroundings, U0 = 6.04 W/m2 oC Heat transfer coefficient from absorber cover surface to surroundings UL = 6.98 W/m2 oC The incident beam radiation on the aperture of the collector is 698 W/m2 and the ambient temperature is 25oC. The collector is designed to heat a fluid entering the absorber at 150oC, at a flowrate of 400 kg/hr. The fluid has Cp = 1.256 kJ/kgoC. [10] Explain the principle and working of solar ponds with neat sketch. [8] Wind at 1 standard atmospheric pressure and 15oC has a velocity of 15 m/s Calculate : [8] i) The total power density in the wind stream. ii) The maximum obtainable power density. iii) A seasonally obtainable power density. P.T.O. b) iv) The total power. v) The torque and axial thrust. Given : Turbine diameter : 120 m, and turbine operating speed = 40 rpm at maximum efficiency. Propeller type wind turbine is considered. Discuss the importance of nuclear option for electricity generation in India. Give the reactions involved in nuclear fusion. [8] OR Q4) a) b) Q5) a) b) c) Enlist the factors considered for optimization of biogas plant and discuss the working of biogas plant. [8] What are the different methods for hydrogen storage? Describe their [8] advantages and disadvantages. Distinguish between Waste heat recovery boiler and Economizer. [4] Explain the principle of heat pipe with suitable diagram? List out the [6] applications of heat pipe. Explain in detail the efficient use of steam condensate in chemical plant. [6] OR Q6) a) b) Incineration is the last resource in waste management. Discuss the incinerator is a energy recycle device. [8] Define heat regeneration. Explain the principle of heat regeneration with suitable example. [8] SECTION - II Q7) a) b) Explain the concept of cogeneration and their types with neat diagram. Discuss it s significance in sugar industry. [10] Justify that fluidized bed combustion of coal is efficient method of combustion. [8] OR Q8) a) b) Explain the energy performance assessment of heat exchanger. [10] Justify that Steam trap and Pressure Reducing Valves (PRV) are energy conservation devices. [8] Q9) a) Enlist the energy consumption units in Petrochemical industries. Discuss how energy can be conserved and give your recommendation. [10] Explain the energy conservation policy of State & Central Government. [6] b) [3664] - 278 -2- OR Q10)a) b) Explain the energy conservation act of Govt. of India. [10] Enlist different energy consuming unit operations along with type of energy needed in manufacturing of Portland cement. [6] Q11)a) Distinguish between Preliminary Audit and Detailed Audit Explain sankey diagram and it s use. [10] Explain cost - benefit analysis of energy recovery system. [6] b) OR Q12)Explain the following (Any four) : a) Various methods of using biomass as source of energy. b) Energy Audit Instruments. c) Benchmarking and Energy Performance. d) Energy conservation in paper and pulp industry. e) Role of Insulation in energy conservation. [3664] - 278 -3- [16]

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