Solar Hot Water Systems Design Quiz
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Question 1 of 10
1. Question
1. Which of the following locations in the United States get the most daily solar radiation?
Hint
Sacramento, CA
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Question 2 of 10
2. Question
2. True or False? A system for year-round heating should have a tilt angle equal to the site’s latitude.
Hint
True. A system for year round heating should have a tilt angle equal to the site’s latitude.
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Question 3 of 10
3. Question
3. Of the following, which are the performance characteristics that are used to assess and compare solar thermal systems?
Hint
Various performance characteristics are used to assess and compare solar thermal systems. The most important ones are the “solar fraction” (SF), the “specific solar energy yield” (SE), and the “solar system efficiency” (SN).
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Question 4 of 10
4. Question
4. What system would be recommended for a location with outdoor winter temperatures that are below freezing?
Hint
Any of the above
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Question 5 of 10
5. Question
5. True or False? The purpose of the transparent cover is to reduce the radiant losses from the absorber, while allowing the maximum amount of radiation to reach the absorber.
Hint
False. The purpose of the transparent cover is to reduce the convection losses from the absorber, while allowing the maximum amount of radiation to reach the absorber.
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Question 6 of 10
6. Question
6. Which of the following collectors is designed to increase water/steam temperatures up to 350°F and also are the most efficient for cold climates?
Hint
- Unglazed EPDM* collector – below 90 °F (32 °C)
- Flat plate – below 160 °F (71 °C)
- Evacuated tube – up to 350 °F (177 °C)
- Parabolic trough – up to 570 °F (299 °C).
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Question 7 of 10
7. Question
7. True or False? Rather than water as a medium, a hot air collector uses air. This configuration may be an alternative in certain situations.
Hint
True. Rather than water as a medium, a hot air collector uses air. This configuration may be an alternative in certain situations.
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Question 8 of 10
8. Question
8. What is the term for the potential hazard when the heat transfer fluid stays in the collector too long and a high temperature is reached greater than the normal due to the heat from solar radiation?
Hint
Stagnation occurs when the heat transfer fluid stays in the collector too long and a high temperature is reached greater than the normal due to the heat from solar radiation.
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Question 9 of 10
9. Question
9. The flow through each solar collector should have basically ____________ pressure drop.
Hint
The flow through each solar collector should have basically the same pressure drop.
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Question 10 of 10
10. Question
10. True or False? A challenge in applying renewable energies is often the mismatch between the time energy is needed and the time energy is available.
Hint
True. A challenge in applying renewable energies is often the mismatch between the time energy is needed and the time energy is available.