Answered: A 1.2 m wide and 5.1 m long solar…

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

A 1.2 m wide and 5.1 m long solar collector is mounted to a roof. Now the average surface temperature of the solar collector is measured to be 50 ^oC. The effective surrounding sky temperature is 8 ^oC. If the emissivity of the collector is 0.88, determine the rate of heat transfer from the collector to the surroundings due to radiation.

Expert Solution

Step 1

Given

width of solar collector $w = 1.2 m$

Length of solar collector $l = 5.1 m$

Average surface temperature of solar collector $T_{a v g} = 50^{°} C \approx 323 K$

Surrounding temperature $T_{\infty} = 8 ° C \approx 281 K$

Emissivity $ϵ = 0.88$

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