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Consider a small surface of area A₁ = 7 x 10m², which emits diffusely with a total, hemispherical emissive power of E₁ = 3 × 10%; W m² ከ1 n2 02 = 30° A2 to 12 = 0.6m

Consider a small surface of area A₁ = 7 x 10m², which emits diffusely with a total, hemispherical emissive power of E₁ = 3 × 10%; W m² ከ1 n2 02 = 30° A2 to 12 = 0.6m

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter11: Heat Transfer By Radiation
Section: Chapter Questions
Problem 11.3P: Determine the total average hemispherical emissivity and the emissive power of a surface that has a...
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Hello, I am a mechanical engineering student and want to upload this question as I have an exam in early June about thermodynamics. I have been given a question that will help me answer my exams in June. Please could you answer showing step by step guidance on how to answer this question with the formula clearly shown. 

 

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3. Consider a small surface of area A₁ = 7 x 10-4m², which emits diffusely with a total, W m² hemispherical emissive power of E₁ n₁ 0₁ A₁ = 3 x 104. 60% n2 0₂ = 30° (b) What is the irradiation G2 on A₂? A₂ r2 = 0.6m Fig.3. Surface irradiation between two surfaces (a) At what rate is this emission intercepted by a small surface of area A₁ = 3 × 10-4m², which is oriented as shown? (c) For zenith angles of and 0₂ = 0,30, and 60°, plot G2 as a function of the separation distance for 0.3 ≤ ₂ ≤ 1.2
Transcribed Image Text:3. Consider a small surface of area A₁ = 7 x 10-4m², which emits diffusely with a total, W m² hemispherical emissive power of E₁ n₁ 0₁ A₁ = 3 x 104. 60% n2 0₂ = 30° (b) What is the irradiation G2 on A₂? A₂ r2 = 0.6m Fig.3. Surface irradiation between two surfaces (a) At what rate is this emission intercepted by a small surface of area A₁ = 3 × 10-4m², which is oriented as shown? (c) For zenith angles of and 0₂ = 0,30, and 60°, plot G2 as a function of the separation distance for 0.3 ≤ ₂ ≤ 1.2
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