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- Solar Energy Engineering - SEE
- 2017
- PYQ
**Biju Patnaik University of Technology Rourkela Odisha - BPUT**- Chemical Engineering
- B.Tech
**704 Views**- 6 Offline Downloads
- Uploaded 1 year ago

Registration No: Total Number of Pages : 02 B.Tech PCE3G001 3rd Semester Regular Examination 2017-18 SOLAR ENERGY ENGINEERING BRANCHE : CHEM Time : 3 Hours Max Marks : 100 Q.CODE : B1244 Answer Question No.1 and 2 which are compulsory and any four from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) f) g) h) i) j) Answer the following questions : multiple type or dash fill up type : What is the standard value of solar constant? (i) 1 kW/m2 (ii) 1.367 kW/m2 (iii) 1.5 kW/m2 (iv) 5 kW/m2 The percentage of the incoming radiation reflected back to space by the earth is (i) 10% (ii) 20% (iii) 30% (iv) 40% What is the value of concentration ratio of a flat-plate collector? (i) 1 (ii) 10 (iii) 100 (iv) 1000 The value of heat removal factor FR of a flat plate collector lies in the range : (i) 0 to 0.1 (ii) 0 to 1 (iii) 0.9 to 0.95 (iv) 0.5 to 0.6 A typical open-circuit voltage of a solar cell is (i) 12 V (ii) 6 V (iii) 3 V (iv) 0.5 V A solar cell is basically : (i) a voltage source, controlled by flux of radiation (ii) a current source, controlled by flux of radiation (iii) an uncontrolled current source (iv) an uncontrolled voltage source At maximum power point of the solar cell : (i) current is maximum (ii) voltage is maximum (iii) both voltage and current are maximum (iv) the product of voltage and current is maximum The energy recovery efficiency of a flywheel storage is of the order of (i) 50% (ii) 10% (iii) 30% (iv) 90% Angle between the sun’s ray and the normal to the horizontal plane is (i) inclination angle (ii) zenith angle (iii) hour angle (iv) declination angle Terrestrial radiation has a wavelength in the range of (i) 0.2 µm to 4 µm (ii) 0.2 µm to 0.5 µm (iii) 0.38 µm to 0.76 µm (iv) 0.29 µm to 2.3 µm (2 x 10) Answer the following questions : Short answer type : What are different forms of energy? Define thermal energy storage and what is its type? What do you mean by greenhouse effect? Differentiate between solar azimuth angle and surface azimuth angle. What are the instruments used to measure solar radiation? Differentiate between passive and active solar water heating scheme. What is the function of heliostat? Find VOC, if VT at room temperature is 26mV, ISC is 2A and Io is 1nA. Differentiate between fill factor and efficiency of a Solar cell. What are the applications of Solar Photovoltaic? (2 x 10)

Q3 a) b) Explain the construction and principle of operation of a sunshine recorder. Calculate zenith angle of the sun at New Delhi at 1:30 PM (solar time) on February 20, 2017. Given Latitude angle Ø= 28°35'. (10) (5) Q4 a) b) Discuss types of solar collectors and their working principle. Explain the function of main components of a flat plate collector. (10) (5) Q5 a) b) Derive the expression for liquid flat plate collector efficiency. What are the effects of various parameters on performance of flat plate collector (10) (5) Q6 a) b) Draw equivalent circuit of a solar cell and explain its characteristics. A PV system feeds a dc motor to produce 3 hp power at the shaft. The motor efficiency is 80%. Each module has 36 multicrystalline silicon solar cells arranged in a 9 x 4 matrix. The cell size is 125mm x 125mm and the cell efficiency is 12%. Calculate the number of modules required in the PV array. Assume global radiation incident normally to the panel is 1 kW/m2. (10) (5) Q7 a) (10) b) What is the effect of variation of insolation and temperature on PV characteristics? What is the effect on shadowing on the performance of solar cell? Q8 a) b) Explain the solar passive space heating and cooling systems. Explain the working of solar distillation. (10) (5) Q9 a) What is the necessity of energy storage system? Explain the types of different energy storage methods with appropriate examples. Briefly explain the spectral energy distribution of solar radiation. (10) b) (5) (5)

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