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The relation between the radiant star temperature in an enclosure and the mean observable temperature

Authors
Journal
Building and Environment
0360-1323
Publisher
Elsevier
Publication Date
Volume
27
Issue
1
Identifiers
DOI: 10.1016/0360-1323(92)90012-e

Abstract

Abstract In handling the effects of longwave radiant exchange in an enclosure, it is useful to have two measures for the global temperature; the space or volume-averaged observable radiant temperature T rv , and the temperature T rs at the star point when the physical surface-to-surface pattern of radiant exchange is replaced by an approximately equivalent surface-to-star point pattern. T rv is needed in connection with our perception of thermal comfort, but is difficult to estimate: T rs is fictitious but is easy to calculate. It would be convenient if T rs could be used as a satisfactory estimate of T rv . This proves to be the case for enclosures which are not too far from cubic, but it is not true for all shapes. The case of radiant exchange in a triangular enclosure is also discussed since the transformation to a star pattern is exact.

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