STUPIDSID
Write short note any four question from Q.1(a, b, c, d, e)
1(a)
Fuel cells.
5 M
1(b)
Classification of energy sources.
5 M
1(c)
Life cycle cost.
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1(d)
Solar still.
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1(e)
HAWT.
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2(a)
Data for FPC used for heating are given below:
Location and latitude Coimbatore: (11°00'N)
Day and Time: (March 22,14.30-15.30 LST
Annual average intensity of solar radiation: 560W/m2
Collector tilt = 26°
No.of glass covers = 2
Heat removal factor of collector = 0.82
Transmittance of glass = 0.88
Absorptance of glass = 0.93
Top loss coefficient = 7.95 W/m2°C
Collector fluid temperature = 75°C
Ambient temperature=25°C
Diffusive reflectance for two covers: 0.24
Calculate 1) Solar altitude angle, 2) incident angle and collector efficiency.
Location and latitude Coimbatore: (11°00'N)
Day and Time: (March 22,14.30-15.30 LST
Annual average intensity of solar radiation: 560W/m2
Collector tilt = 26°
No.of glass covers = 2
Heat removal factor of collector = 0.82
Transmittance of glass = 0.88
Absorptance of glass = 0.93
Top loss coefficient = 7.95 W/m2°C
Collector fluid temperature = 75°C
Ambient temperature=25°C
Diffusive reflectance for two covers: 0.24
Calculate 1) Solar altitude angle, 2) incident angle and collector efficiency.
10 M
2(b)
Draw a neat diagram and explain working KVIC design of a biogas digester.
10 M
3(a)
Estimate monthly average total daily radiation of FPC facing south, at Delhi (28°35'N, 77°12'E) during the month of November if the average sunshine hours per day is 9.5. Assume the values of a = 0.31 and b = 0.43
10 M
3(b)
Calculate i) the volume of biogas digester suitable for output of four cows, and ii) the power available from the digester. Retention time is 20 days and temperature 30°C, Dry matter consumed is 2kg/day, biogas yield 0.24m 3 per kg. Burner efficiency is 60% methane proportion is 0.8. Heat of coumbustion of methane may be assumed to be 28MJ/m3
10 M
4(a)
Explain energy status of India Maharashtra and role of NCES.
8 M
4(b)
A geothermal site of size 70km2 and depth 2Km, has temp. Of 240°C and volumetric sp Heat of 2.51 J/cm3 °C. Find energy content is Joules, if surface temp is 30°C and for how many years site can provide power for a 2500MWe plant if conversion efficiencyis 1.6%
8 M
4(c)
What is district heating?
4 M
5(a)
What are the advantages and limitations of tidal power generation?
6 M
5(b)
What are reaction phases taking place in digester?
6 M
5(c)
What is Beltz coefficient? Derive its value
8 M
Write short note any four question from Q.6(a, b, c, d, e)
6(a)
What is Wave energy?
5 M
6(b)
What are advantages and disadvantages of wind power?
5 M
6(d)
What is Open cycle OTEC plant?
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6(e)
Define i) solar constant ii) angle declination
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