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Empirical approach to outdoor WBGT from meteorological data and performance of two different instrument designs.

Authors
Bernard-TE; Barrow-CA
Source
Ind Health 2013 Jan-Feb; 51(1):79-85
NIOSHTIC No.
20043536
Abstract
The wet bulb globe temperature index (WBGT) is a common method to assess the environmental contribution to heat stress as part of an occupational exposure assessment. The two purposes of this study were (1) to compare empirical relationships of some meteorological conditions to WBGT, and (2) to evaluate a smaller globe and alternative method to assess natural wet bulb using a relative humidity sensor. Data were collected in six West-central Florida locations over multiple days for a total of 14 measurement days. Multiple linear regression was used to explore relationships relevant to the two purposes. It was clear that estimating WBGT directly from meteorological data or through estimates of the components of WBGT can be accomplished with a 95% confidence of +/- 2 degrees C-WBGT. The 50 mm globe size is a reasonable approximation of the standard size (150 mm). The relative humidity method of the waterless natural wet bulb provides a very good estimation of natural wet bulb temperature. The determination of WBGT from the electronic instruments (small globe with or without the relative humidity method) provided a good estimate of the WBGT.
Keywords
Environmental-exposure; Environmental-factors; Environmental-hazards; Heat; Heat-exposure; Heat-stress; Thermal-effects; Exposure-levels; Risk-factors; Temperature-effects; Etiology; Humans; Men; Women; Monitoring-systems; Meteorology; Wet-bulb-thermometers; Author Keywords: WBGT; Wet bulb globe temperature; Meteorological data; Instruments
CODEN
INHEAO
Publication Date
20130101
Document Type
Journal Article
Email Address
tbernard@health.usf.edu
Funding Type
Grant
Fiscal Year
2013
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008438; M122013
Issue of Publication
1
ISSN
0019-8366
Source Name
Industrial Health
State
FL
Performing Organization
Sunshine Education and Research Center, University of South Florida
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