Abstract
Thermal radiation shields in the form of low-emissivity surfaces spaced on
low-conductance supports can be used to advantage as a replacement for
multilayer insulation in radiant coolers. A view factor between adjacent shields
of less than unity increases the insulation factor when the surfaces terminate
with an external view. An analytical model that accounts for unequal areas as
well as the reduced view factor is shown to be in good agreement with
experimental measurements when the end area absorption and emission are small.
The modifications to both the analytical model and the experimental evaluation
are discussed for the case of significant end absorption or emission.
© 1976 Optical Society of America
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