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Questions and Answers
What is the amount of solar energy received per unit of time on a normal surface at the average distance between the sun and earth?
What is the amount of solar energy received per unit of time on a normal surface at the average distance between the sun and earth?
- 1,053 W/m2
- 1,353 W/m2 (correct)
- 690 W/m2
- 1,800 W/m2
Which classification of solar energy applications relies on heat energy from the sun?
Which classification of solar energy applications relies on heat energy from the sun?
- Thermal or heat based applications (correct)
- Photovoltaic applications
- Electrical energy applications
- Mechanical energy applications
How does the photovoltaic (PV) system generate electricity?
How does the photovoltaic (PV) system generate electricity?
- By converting heat into electricity
- By utilizing mechanical energy
- By transforming illumination-spectrum intensity using solar cells (correct)
- By absorbing the solar wind
What is a significant feature of photovoltaic (PV) systems?
What is a significant feature of photovoltaic (PV) systems?
Which pathway does NOT specifically relate to solar energy conversion?
Which pathway does NOT specifically relate to solar energy conversion?
What is the average solar radiation absorbed by the Earth?
What is the average solar radiation absorbed by the Earth?
Which of the following statements about solar power applications is FALSE?
Which of the following statements about solar power applications is FALSE?
What does the acronym PV stand for in the context of solar energy?
What does the acronym PV stand for in the context of solar energy?
What is the primary energy transformation mechanism used in thermal applications of solar energy?
What is the primary energy transformation mechanism used in thermal applications of solar energy?
Which of the following is NOT a characteristic of photovoltaic (PV) systems?
Which of the following is NOT a characteristic of photovoltaic (PV) systems?
In the context of solar power, what is meant by 'illumination-spectrum intensity'?
In the context of solar power, what is meant by 'illumination-spectrum intensity'?
Which statement best describes the normal surface at the average distance between the sun and the earth?
Which statement best describes the normal surface at the average distance between the sun and the earth?
What type of materials are primarily used in photovoltaic applications?
What type of materials are primarily used in photovoltaic applications?
What does the classification of solar energy applications primarily distinguish between?
What does the classification of solar energy applications primarily distinguish between?
Which of the following applications utilizes solar energy to generate mechanical energy?
Which of the following applications utilizes solar energy to generate mechanical energy?
Which of these factors does NOT significantly influence the effectiveness of solar energy conversion?
Which of these factors does NOT significantly influence the effectiveness of solar energy conversion?
What is a disadvantage of relying solely on solar thermal energy applications?
What is a disadvantage of relying solely on solar thermal energy applications?
Which component is primarily responsible for the conversion of sunlight into electricity in PV systems?
Which component is primarily responsible for the conversion of sunlight into electricity in PV systems?
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Study Notes
Solar Power
- Solar power is the energy received from the sun.
- The average solar energy received per unit time on a normal surface at the average distance between the sun and the earth outside the earth’s atmosphere is 1,353 W/m2.
- The earth absorbs about 690 W/m2 of solar radiation.
Solar Energy Applications
- Thermal or heat based applications utilize the heat energy from the sun.
- Used directly to heat or cool systems.
- Transformed to other energy forms like mechanical or electrical energy.
- Photovoltaic applications use the illumination-spectrum intensity from the sun.
- Transforms illumination directly into electricity using semi-conductor materials (e.g. solar cells).
- Photovoltaic (PV) systems are quiet, reliable, low maintenance, and have a long lifespan.
Solar Power Basics
- Solar energy is energy from the sun
- Earth receives 1,353 W/m2 of solar energy outside the atmosphere
- Earth receives 690 W/m2 of solar energy after atmospheric absorption
Solar Energy Applications
-
Thermal/Heat-Based Applications
- Uses heat energy from the sun
- Can directly heat or cool systems
- Can be transformed into mechanical or electrical energy
-
Photovoltaic Applications
- Uses the sun's illumination spectrum
- Uses semiconductor materials like solar cells to convert light into electricity
- Photovoltaic (PV) systems are quiet, reliable, low maintenance, and long-lasting
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