Calculate the heat transfer between two (50*40 cm) parallel plates at constant temperatures of 71 = 100 K and 72 = 50 K that are L- 1 cm apart, assuming the emissivity (r) is 0.6 according to the following conditions. 1. The parallel plates filled with atmospheric air assume the thermal conductivity at the average temperature of 250 K is k=0.021 Heat direction Air Space Heat direction Super-insulation W/m °C for air, Stefan-Boltzmann constant is 5.67*10 *W/m².K* 2. The parallel plates are filled with super-insulated material and have an apparent thermal conductivity of 0.00004 W/m °C.

Calculate the heat transfer between two (5040 cm) parallel plates at constant temperatures of 71 = 100 K and 72 = 50 K that are L- 1 cm apart, assuming the emissivity (r) is 0.6 according to the following conditions. 1. The parallel plates filled with atmospheric air assume the thermal conductivity at the average temperature of 250 K is k=0.021 Heat direction Air Space Heat direction Super-insulation W/m °C for air, Stefan-Boltzmann constant is 5.6710 W/m².K 2. The parallel plates are filled with super-insulated material and have an apparent thermal conductivity of 0.00004 W/m °C.

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.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.31P: A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The...

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A spherical communications satellite, 2 m in diameter, is placed in orbit around the earth. The satellite generates 1000 W of internal power from a small nuclear generator. If the surface of the satellite has an emittance of 0.3, and is shaded from solar radiation by the earth, estimate its surface temperature.
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Either free or forced convection is good by considering an example. please explain
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