Short communication, Note

Evaluation of radiant heat stress

J. Sušnik ; Health Centre, Ravne na Koroskem, Yugoslavia

Abstract

The heat radiation stress ds usually measured in terms of the »corrected effective temperature«. This index like many others serving to evaluate the heat radiation stress involves the globe temperature resulting from the mean radiant temperature and air temperature. Man is supposed to react in the same way when exposed to the same globe temperature, provided that the vapour pressure, air speed, metabolism and clo values do not change. A series of experiments were performed on a single subject. At the same globe temperature the heart rate, rectal temperature and sweat loss increased in accordance with the increased air temperature and the corresponding mean radiation temperature. In two other experiments on male subjects the heat component of the pulse rate was found to be different at numerically equal effective and corrected effective temperatures. If these experimental results are confirmed in the future, all indices, involving the globe temperature become questionable. With small but powerful sources of heat radiation a formula of the heat radiation exchange between the heat source and man is proposed. The problem of different surfaces irradiated at different working postures, and the more sophisticated problem of the »shady« zones of the body are discussed.

Keywords

Hrčak ID:

157862

URI

https://hrcak.srce.hr/157862

Publication date:

3.10.1984.

Article data in other languages: croatian

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