Solar Power Systems: 1

What do you call a conversion technology that yields electricity straight from sunlight without the aid of a working substance like gas or steam without the use of any mechanical cycle?

• Power conversion

• Stirling cycle conversion

• Solar Thermal Conversion

• Photovoltaic-energy conversion

Solar energy arrives at the outside of the earth’s atmosphere at an average rate of _________.

• 1.354 kW/m2

• 1.543 kW/m2

• 2.354 kW/m2

• 2.543 kW/m2

How many percent of solar energy survives absorption and reflection?

• 40 to 70%

• 30 to 60%

• 50 to 80%

• 20 to 50%

Which of the following solar collectors are essentially wide, flat boxes with clear plastic or glass coverings known as the glazing?

• Flat plate collectors

• Concentrating collectors

• Focusing collectors

• Evacuated tube collectors

Which of the following collectors use mirrors and/or lenses to focus the suns energy on  a small absorber area.

• Flat plate collectors

• Concentrating collectors

• Non- Focusing collectors

• Evacuated tube collectors

Which of the following collectors are more complex, but their efficiencies are higher?

• Flat plate collectors

• Concentrating collectors

• Focusing collectors

• Evacuated tube collectors

Which of the following collectors are useful when extremely hot transfer fluid is needed and are generally limited to commercial projects?

• Flat plate collectors

• Concentrating collectors

• Focusing collectors

• Evacuated tube collectors

The shading factor in calculating the heat absorbed by the solar collector has a value of approximately:

• 0.95 to 0.97

• 0.85 to 0.87

• 0.75 to 0.77

• 0.65 to 0.67

The ratio of energy absorbed by the transfer fluid to the original incident energy striking the collector.

• Collector efficiency

• Sun efficiency

• Shading Factor

• Absorptance

As the difference between the ambient air and average plate (or inlet)  temperature increases, what happens to the collector efficiency?

• Increases

• Decreases

• Constant

• No effect