1. Explain the difference between irradiance and irradiation. 2. Why is the solar constant specified for Earth's distance from the sun? 3. What is the difference between direct radiation and diffuse radiation? 4. How are the solar constant and peak sun values similar and how do they differ? 5. What is the role of air mass in terrestrial solar radiaton? 6. What is insolation? 7. How can pyranometers be used to measure only direct solar radiation? 8. Explain how the solstices and equinoxes relate to the sun's apparent motion across the sky. 9. Which two factors affect the difference between solar time and standard time? 10. Which factors define the solar window? 11. Why does the optimal array tilt angle change throughout the year? 12. How does the type of collector and mount affect the potential energy gain for an array?
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Irradiance refers to the power per unit area of electromagnetic radiation received on a surface, typically measured in watts per square meter (W/m²). It represents the intensity of solar radiation at a specific location and time. On the other hand, irradiation Show more…
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