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Renewable Energy Sources & Applications

This document contains an exam for a course on renewable energy sources and applications. It includes: 1. A 10 question multiple choice section testing definitions and concepts in renewable energy. 2. An essay question asking students to calculate performance metrics like net refrigeration capacity from data on a chilling system. 3. Five essay questions worth 70% of the exam grade, asking students to explain topics like the advantages of solar water heaters, how shading impacts PV modules, wave energy conversion systems, and energy audits.

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106 views2 pages

Renewable Energy Sources & Applications

This document contains an exam for a course on renewable energy sources and applications. It includes: 1. A 10 question multiple choice section testing definitions and concepts in renewable energy. 2. An essay question asking students to calculate performance metrics like net refrigeration capacity from data on a chilling system. 3. Five essay questions worth 70% of the exam grade, asking students to explain topics like the advantages of solar water heaters, how shading impacts PV modules, wave energy conversion systems, and energy audits.

Uploaded by

priyansh
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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INDIAN MARITIME UNIVERSITY

(A Central University, Government of India)

RENEWABLE ENERGY SOURCES & APPLICATIONS


SEMESTER – VIII, B.TECH(MARINE ENGINEERING): DEC/JAN 2013-14
SUBJECT CODE: E 1804
(AY 2009-10 to 2012-13 batches only)

Date: 11.01.2014 Time: 3 Hrs


Maximum Marks:100
(Weightage 70%)

SECTION - A
Compulsory Questions
1. (2x10 = 20)
a) What is work function in photo voltaic effect ? 2
b) What do you mean by solar array ? 2
c) Give the unit of the overall coefficient of heat transfer ?: 2
d) Give the typical range of wind speed (km/hr) for power generation ? 2
e) Define pitch angle ? 2
f) Define Bernoulli’s principle ? 2
g) What is the recommended distance between wind turbines installed in a 2
wind farm?
h) Fill in the Blank :: Power generated from a wind turbine is proportional to
2
_______ of wind speed.
i) How distilled water can be produced from sea water using solar energy ? 2

j) Specify techniques to convert biomass in to energy. 2

2. (a) Field tests were carried out on a chilling system to find out the energy 10
performance ratios. The measurements data are as under:
Temperature of the refrigerant entering the evaporator is – 20C. Temperature
of the refrigerant leaving the evaporator is -50C. Flow rate of refrigerant is
15000Kgs/hr. Specific heat of the refrigerant is 2.3Kcal/Kg0C. Current input
into compressor is 70A. Voltage input measured is 415 V and Power
factor is 0.9. Find out the following :
(i) Net refrigeration capacity.
(ii) Kw/ton rating.
(iii) Coeffient of performance (COP).
(iv) Energy Efficiency ratio.(EER).
OR
(b) Explain the environmental aspects of Electrical energy generation. 10
SECTION - B (5x14 = 70)
Answer any Five of the following eight questions

3. a) What are the advantages of the solar water heater? 6

b) Explain solar spectrum and write a short note on “Total clear sky isolation on a 8
collecting surface”

4. a) How does shading impacts on I-V curves of a PV module and the role of 8
bypass diode and blocking diode.

b) Explain from cell to module and from module to array (for solar energy 6
system).

5. a) What is meant by “Solar window”? 4

b) The following parameters were observed during the testing of a cooling 10


water pump: Discharge pressure of pump : 5.0 Kg/cm2 , Flow rate of
water: 900 m3/hr., Suction head : 2 metre below the pump centerline.
Height of cooling tower: 5 metre, Motor efficiency: 90%. , Density of
water: 1000 Kg/m3, Current drawn by pump motor : 260 amps., Voltage
measured : 415volts., Power factor measured: 0.9 Calculate the
following:
(i) Hydraulic power.
(ii) Pump Efficiency.

6 a) Discuss the environmental aspect of energy utilization. 7

b) Write short note on “Nuclear Waste Disposal” 7

7 a) What is biomass? What is bio-directional melting and list its advantages. 7

b) Write a short note on Global Warming and Climate Changes. 7

8 a) Explain wave energy conversion system. 7

b) Write a short note on Micro-turbine generation system. 7

9 a) Explain the grid connected PV systems and its interfacing with the utility. 7

b) Explain single crystal czochralski silicon technology. 7

10 a) What is ‘Energy Audit’? Name two different types of energy Audit. 7

b) Describe working of ‘Vertical axis windmill’ and draw a labeled sketch. 7


*******

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