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Int J Occup Saf Ergon. 2018 Jul 11:1-9. doi: 10.1080/10803548.2018.1475957. [Epub ahead of print]

The association between wet-bulb globe temperature and other thermal indices (DI, MDI, PMV, PPD, PHS, PSI and PSIhr): a field study.

Author information

1
a School of Public Health , Kerman University of Medical Sciences , Iran.
2
b Institute for Future Studies in Health , Kerman University of Medical Sciences , Iran.
3
c School of Public Health , Urmia University of Medical Sciences , Iran.

Abstract

The current study aimed at comparing the correlation coefficients between wet-bulb globe temperature (WBGT) and a number of parameters, including the discomfort index (DI), modified discomfort index (MDI), predicted mean vote (PMV), predicted percentage of dissatisfaction (PPD), predicted heat strain (PHS), physiological strain index (PSI) and physiological strain index heart rate (PSIhr). In total, 30 workers of a pelletizing factory participated in this study. Environmental parameters and workers' physiological parameters were measured in 10 working stations. The results showed that effective WBGT (WBGTeff) strongly correlates with DI, MDI, PMV, PPD, PHS, PSI and PSIhr. WBGTeff had the highest correlation coefficients with PMV, MDI, PHS and PSIhr. Based on the obtained results, it was concluded that heat stress exceeded the standard limit for a number of indices in some of the working stations. Thus, some controlling measures should be taken to reduce heat stress in these stations.

KEYWORDS:

dry temperature; heat; thermal indices; thermal stress; wet-bulb globe temperature

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