  # Radiation Network Analysis Study Notes for Mechanical Engineering

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Updated on: September 25th, 2023 Irradiation (G) is defined as the total thermal radiation incident upon a surface per unit time per unit area (in W/m2) Table of content Irradiation (G) is defined as the total thermal radiation incident upon a surface per unit time per unit area (in W/m2) The total thermal radiation leaving a surface per unit time & per unit area is called radiosity of the surface. J = Emitted Energy + Reflected Part of Incident energy,

The net radiation heat exchange between the surface & all of its surroundings is given by,   Radiation heat exchange between two finite surfaces:  This space resistance shall exist in the space between two surfaces exchanging heat by radiation. Therefore, (i) Radiation Exchange Between two Infinitely Large Plane Surfaces:  (ii) TWO INFINITELY LONG CYLINDERS: Therefore, F12 = 1, F21 = 1  Since surfaces are very large

A1 = A2 = A3 = 1 and F13 = 1, F32 = 1

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