Derivation and analysis of the indoor Wet Bulb Globe Temperature index (WBGT) with a human thermal engineering approach ― Part 1. Properties of the WBGT formula for indoor conditions with no solar radiation.

SUMMARY The authors present a theoretical derivation of the WBGT for mula for outdoor conditions that was originally developed from the results of experiments on human subjects, based on a heat balance equation between the human body and its outdoor environment. The three coefficients of wet bulb temperature Tw, globe temperature Tg, and air temperature Ta were expressed in almost the same way as in the indoor WBGT formula, but they contain a...