Mech. Engg. Dept. 4th year 2022-2023 Solar Energy Spring course MEC364 Dr. Mahmoud U. Jasim Review/Recap Sheet Q1- Answer with true or false and rewrite the false statements completely in correct form, otherwise no mark will be put on the false statements. 1 2 To represent a location on earth surface you need to define its altitude and longitude angles. 3 Solar zenith and solar incidence angles have the same value for horizontal surface. At sunset time the value of solar altitude angle is maximum. 4 The angle which represents the inclination of a given surface is the zenith angle 5 6 7 8 When the absolute value of sun-wall azimuth angle exceeds 90' this means that the sun rays are reaching the receiving plane. The solar irradiance and the solar irradiation have the same physical meaning. In the case of clear sky weather, the beam solar irradiation on a horizontal surface is less than the diffused irradiation. The total solar radiation received by a tilted surface is the same as that received by the horizontal surface at the same instance. 9 The units of the solar constant is W/m 10 The air mass is the mass of the vertical column of air over the solar collector. Q2- Answer with true or false and rewrite the false statements completely in correct form, otherwise no mark will be put on the false statements. 1 2 The correction factor for tilted solar radiation receiving surfaces (Rb= cos(solar incidence angle) / cos(solar zenith angle)) should applied on the diffused solar radiation component only. In solar thermal technologies of utilizing solar energy, the solar energy is first converted to mechanical energy 3 The absorber plate is not a component of flat-plate solar collector. 4 5 An active solar water heating system uses thermo-siphoning effect to circulate the water through the collector. PV systems can produce only DC current but it can be converted to alternating current AC by the help of electric generator.
Mech. Engg. Dept. 4th year 2022-2023 Solar Energy Spring course MEC364 Dr. Mahmoud U. Jasim Review/Recap Sheet Q1- Answer with true or false and rewrite the false statements completely in correct form, otherwise no mark will be put on the false statements. 1 2 To represent a location on earth surface you need to define its altitude and longitude angles. 3 Solar zenith and solar incidence angles have the same value for horizontal surface. At sunset time the value of solar altitude angle is maximum. 4 The angle which represents the inclination of a given surface is the zenith angle 5 6 7 8 When the absolute value of sun-wall azimuth angle exceeds 90' this means that the sun rays are reaching the receiving plane. The solar irradiance and the solar irradiation have the same physical meaning. In the case of clear sky weather, the beam solar irradiation on a horizontal surface is less than the diffused irradiation. The total solar radiation received by a tilted surface is the same as that received by the horizontal surface at the same instance. 9 The units of the solar constant is W/m 10 The air mass is the mass of the vertical column of air over the solar collector. Q2- Answer with true or false and rewrite the false statements completely in correct form, otherwise no mark will be put on the false statements. 1 2 The correction factor for tilted solar radiation receiving surfaces (Rb= cos(solar incidence angle) / cos(solar zenith angle)) should applied on the diffused solar radiation component only. In solar thermal technologies of utilizing solar energy, the solar energy is first converted to mechanical energy 3 The absorber plate is not a component of flat-plate solar collector. 4 5 An active solar water heating system uses thermo-siphoning effect to circulate the water through the collector. PV systems can produce only DC current but it can be converted to alternating current AC by the help of electric generator.
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter1: Introduction To Statics
Section: Chapter Questions
Problem 1.12P: A differential equation encountered in the vibration of beams is d4ydx4=2D where x = distance...
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Transcribed Image Text:Mech. Engg. Dept.
4th year 2022-2023
Solar Energy
Spring course MEC364
Dr. Mahmoud U. Jasim
Review/Recap Sheet
Q1- Answer with true or false and rewrite the false statements completely in
correct form, otherwise no mark will be put on the false statements.
1
2
To represent a location on earth surface you need to define its altitude and longitude
angles.
3
Solar zenith and solar incidence angles have the same value for horizontal surface.
At sunset time the value of solar altitude angle is maximum.
4
The angle which represents the inclination of a given surface is the zenith angle
5
6
7
8
When the absolute value of sun-wall azimuth angle exceeds 90' this means that the sun
rays are reaching the receiving plane.
The solar irradiance and the solar irradiation have the same physical meaning.
In the case of clear sky weather, the beam solar irradiation on a horizontal surface is less
than the diffused irradiation.
The total solar radiation received by a tilted surface is the same as that received by the
horizontal surface at the same instance.
9
The units of the solar constant is W/m
10 The air mass is the mass of the vertical column of air over the solar collector.
Q2- Answer with true or false and rewrite the false statements completely in
correct form, otherwise no mark will be put on the false statements.
1
2
The correction factor for tilted solar radiation receiving surfaces (Rb= cos(solar incidence
angle) / cos(solar zenith angle)) should applied on the diffused solar radiation component
only.
In solar thermal technologies of utilizing solar energy, the solar energy is first converted
to mechanical energy
3 The absorber plate is not a component of flat-plate solar collector.
4
5
An active solar water heating system uses thermo-siphoning effect to circulate the water
through the collector.
PV systems can produce only DC current but it can be converted to alternating current
AC by the help of electric generator.
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