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Questions and Answers
What is the primary function of evacuated tubes?
What is the primary function of evacuated tubes?
Evacuated tubes allow heat to escape easily through convection.
Evacuated tubes allow heat to escape easily through convection.
False
What is the identification number mentioned in the content?
What is the identification number mentioned in the content?
What allows solar radiation to enter an evacuated tube?
What allows solar radiation to enter an evacuated tube?
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Essam Abo Yehia is a recognized doctor.
Essam Abo Yehia is a recognized doctor.
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Heat is trapped from escaping due to __________ in evacuated tubes.
Heat is trapped from escaping due to __________ in evacuated tubes.
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Match the following features with their descriptions for evacuated tubes:
Match the following features with their descriptions for evacuated tubes:
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Who is the individual mentioned in the content?
Who is the individual mentioned in the content?
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The name of the doctor is __________.
The name of the doctor is __________.
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Match the following details with the correct information:
Match the following details with the correct information:
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What is usually a part of the solar heating or cooling system?
What is usually a part of the solar heating or cooling system?
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Energy demand is always linked to solar energy availability.
Energy demand is always linked to solar energy availability.
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What is the primary purpose of a thermal storage system?
What is the primary purpose of a thermal storage system?
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A thermal storage system is usually a part of the solar ________ or cooling system.
A thermal storage system is usually a part of the solar ________ or cooling system.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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What is a primary application of the Compound Parabolic Concentrator (CPC)?
What is a primary application of the Compound Parabolic Concentrator (CPC)?
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The Compound Parabolic Concentrator (CPC) is only used for commercial heating applications.
The Compound Parabolic Concentrator (CPC) is only used for commercial heating applications.
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What does CPC stand for?
What does CPC stand for?
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The Compound Parabolic Concentrator is primarily associated with __________ applications.
The Compound Parabolic Concentrator is primarily associated with __________ applications.
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Match the following applications with the correct description:
Match the following applications with the correct description:
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What is the relationship between the rotor blade length and the power available to the turbine?
What is the relationship between the rotor blade length and the power available to the turbine?
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Increasing the rotor blade length results in a decrease in the power available to the turbine.
Increasing the rotor blade length results in a decrease in the power available to the turbine.
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What does A represent in the context of the swept area formula?
What does A represent in the context of the swept area formula?
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A small increase in the rotor blade length leads to a larger increase in the available power to the ______.
A small increase in the rotor blade length leads to a larger increase in the available power to the ______.
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Match the following variables with their respective descriptions:
Match the following variables with their respective descriptions:
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What is the average noontime radiation rate at 40° north latitude on a clear day?
What is the average noontime radiation rate at 40° north latitude on a clear day?
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A solar collector can collect 100% of the energy that strikes it.
A solar collector can collect 100% of the energy that strikes it.
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How much area is realistically needed for solar collectors to provide 293 kWh of energy per day?
How much area is realistically needed for solar collectors to provide 293 kWh of energy per day?
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The noontime radiation rate on a flat surface normal to the sun’s rays is about _____ W/m2 at 40° north latitude.
The noontime radiation rate on a flat surface normal to the sun’s rays is about _____ W/m2 at 40° north latitude.
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Match the following measurements with their units:
Match the following measurements with their units:
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What factors are taken into account for a realistic solar collector area calculation?
What factors are taken into account for a realistic solar collector area calculation?
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The energy provided by solar collectors can be calculated based solely on sunlight availability.
The energy provided by solar collectors can be calculated based solely on sunlight availability.
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On a clear day, if the percent sunshine is around 70%, the likely energy collected would be _____ percent.
On a clear day, if the percent sunshine is around 70%, the likely energy collected would be _____ percent.
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Study Notes
Energy Management 1 AU 2nd Term Spring 2024 - Chapter 09: Alternative Use of Energy
- This chapter covers alternative energy sources, such as solar thermal systems, photovoltaic systems, and wind power.
- Alternative energy sources are non-depleting or renewable.
- Conventional energy sources, like natural gas, coal, and oil, were once alternative energy sources.
- Government funding and tax incentives for alternative energy research and development (R&D) decreased substantially in the 1980s and early 1990s.
- The MENA region receives the highest solar irradiance globally.
- Solar irradiance (distribution) varies based upon location.
- To maximize energy collection, solar radiation angle should be perpendicular to the collector.
- Solar thermal systems use solar irradiation, thermal collectors, and thermal storage systems to collect solar energy.
- Solar thermal systems include flat-plate collectors, evacuated tube collectors, and volumetric air collectors.
- Concentrating collectors (like parabolic troughs, CSP, Fresnel, solar power towers, and solar dish Stirling engine) concentrate solar radiation for higher temperatures.
- Solar cells (photovoltaics) convert sunlight directly into electricity.
- Solar cells use semiconductor material and p-n junction diodes.
- Wind energy is a form of solar energy, caused by uneven heating of the atmosphere, Earth's surface irregularities, and rotation.
- Wind turbines capture kinetic energy (motion energy) from wind to generate electricity.
- Wind turbine design factors, such as swept area, air density, and wind speed, influence power output.
- Wind turbines include horizontal-axis and vertical-axis types.
- There are diverse components of a wind turbine, including the drive train, a tower, and controls.
- Various thermal storage systems exist, commonly using water in tanks.
- Other systems utilize rock-bed storage.
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Description
Explore the alternative energy sources covered in Chapter 09, including solar thermal systems, photovoltaic systems, and wind power. Understand renewable energy dynamics, government influences, and the significance of solar irradiance characteristics, especially in the MENA region. This chapter provides insights into maximizing energy collection and the various types of solar thermal systems.
