The reflectivity of aluminum coated with lead sulfate is 0.35 for radiation at wavelengths less than 3 mm and 0.95 for radiation greater than 3 mm. Determine the average reflectivity of this surface for solar radiation (T < 5800 K) and radiation coming from surfaces at room temperature (T < 300 K). Also, determine the emissivity and absorptivity of this surface at both temperatures. Do you think this material is suitable for use in solar collectors?
The reflectivity of aluminum coated with lead sulfate is 0.35 for radiation at wavelengths less than 3 mm and 0.95 for radiation greater than 3 mm. Determine the average reflectivity of this surface for solar radiation (T < 5800 K) and radiation coming from surfaces at room temperature (T < 300 K). Also, determine the emissivity and absorptivity of this surface at both temperatures. Do you think this material is suitable for use in solar collectors?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
The reflectivity of aluminum coated with lead sulfate
is 0.35 for radiation at wavelengths less than 3 mm and
0.95 for radiation greater than 3 mm. Determine the average
reflectivity of this surface for solar radiation (T < 5800 K)
and radiation coming from surfaces at room temperature
(T < 300 K). Also, determine the emissivity and absorptivity
of this surface at both temperatures. Do you think this material
is suitable for use in solar collectors?
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