Configuration Factors for Radiant Heat-Transfer Calculations Involving People

1963 ◽  
Vol 85 (1) ◽  
pp. 71-76 ◽  
Author(s):  
R. V. Dunkle
Keyword(s):  
Heat Transfer ◽  
Form Factor ◽  
Radiant Heat ◽  
Graphical Form ◽  
Published Data ◽  
Radiant Heat Transfer ◽  
Simple Equations ◽  
Point Form

Results of point form factor measurements on people are correlated by simple equations for standing and sitting subjects. The point values are integrated to obtain area configuration factors and the results are presented in graphical form for the standing man. Equations for the area configuration factors are given for the seated man. Comparisons are made with other published data.

Radiant Heat Transfer From Isothermal Dispersions With Isotropic Scattering

1967 ◽  
Vol 89 (4) ◽  
pp. 300-308 ◽  
Author(s):  
R. H. Edwards ◽  
R. P. Bobco
Keyword(s):  
Heat Transfer ◽  
Approximate Solutions ◽  
Radiant Heat ◽  
Second Order ◽  
Isotropic Scattering ◽  
Radiant Heat Transfer ◽  
Approximate Methods ◽  
First Order ◽  
Order Solution ◽  
Radiant Transfer

Two approximate methods are presented for making radiant heat-transfer computations from gray, isothermal dispersions which absorb, emit, and scatter isotropically. The integrodifferential equation of radiant transfer is solved using moment techniques to obtain a first-order solution. A second-order solution is found by iteration. The approximate solutions are compared to exact solutions found in the literature of astrophysics for the case of a plane-parallel geometry. The exact and approximate solutions are both expressed in terms of directional and hemispherical emissivities at a boundary. The comparison for a slab, which is neither optically thin nor thick (τ = 1), indicates that the second-order solution is accurate to within 10 percent for both directional and hemispherical properties. These results suggest that relatively simple techniques may be used to make design computations for more complex geometries and boundary conditions.

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