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The end of a cylindrical liquid cryogenic propellant tank in free space is to be protected from solar radiation by placing a thin metallic shield in front of the tank. Assume the view factor F between the tank and the shield is 1. All surfaces are diffuse and gray, and the deep space surroundings is at Tsur = 0 K. A) Find the temperature of the shield. B) Find the heat flux (W/m²) to the end of the tank, with and without the metallic shield. Tank T₁ -Shield, T Solar irradiation Gs E₁- €1 ε2 T₁ = 100 K ε₁ = 2 = 0.05 E₁ = 0.10 Gs = 1250 W/m²

The end of a cylindrical liquid cryogenic propellant tank in free space is to be protected from solar radiation by placing a thin metallic shield in front of the tank. Assume the view factor F between the tank and the shield is 1. All surfaces are diffuse and gray, and the deep space surroundings is at Tsur = 0 K. A) Find the temperature of the shield. B) Find the heat flux (W/m²) to the end of the tank, with and without the metallic shield. Tank T₁ -Shield, T Solar irradiation Gs E₁- €1 ε2 T₁ = 100 K ε₁ = 2 = 0.05 E₁ = 0.10 Gs = 1250 W/m²

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 11.26P
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The end of a cylindrical liquid cryogenic propellant tank in free space is to be protected from solar radiation by placing a thin metallic shield in front of the tank. Assume the view factor F between the tank and the shield is 1. All surfaces are diffuse and gray, and the deep space surroundings is at Tsur = 0 K. A) Find the temperature of the shield. B) Find the heat flux (W/m²) to the end of the tank, with and without the metallic shield. Tank T₁ -Shield, T Solar irradiation Gs E₁- €1 ε2 T₁ = 100 K ε₁ = 2 = 0.05 E₁ = 0.10 Gs = 1250 W/m²
Transcribed Image Text:The end of a cylindrical liquid cryogenic propellant tank in free space is to be protected from solar radiation by placing a thin metallic shield in front of the tank. Assume the view factor F between the tank and the shield is 1. All surfaces are diffuse and gray, and the deep space surroundings is at Tsur = 0 K. A) Find the temperature of the shield. B) Find the heat flux (W/m²) to the end of the tank, with and without the metallic shield. Tank T₁ -Shield, T Solar irradiation Gs E₁- €1 ε2 T₁ = 100 K ε₁ = 2 = 0.05 E₁ = 0.10 Gs = 1250 W/m²
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