Prediction of WBGT-Based Clothing Adjustment Values from Evaporative Resistance

Details

• Personal Author:
  Ashley CD ; Bernard, Thomas E. ; Coca, Aitor ; Garzon XP ; Kim J-H
• Description:
  Wet bulb globe temperature (WBGT) index is used by many professionals in combination with metabolic rate and clothing adjustments to assess whether a heat stress exposure is sustainable. The progressive heat stress protocol is a systematic method to prescribe a clothing adjustment value (CAV) from human wear trials, and it also provides an estimate of apparent total evaporative resistance (Re,T,a). It is clear that there is a direct relationship between the two descriptors of clothing thermal effects with diminishing increases in CAV at high Re,T,a. There were data to suggest an interaction of CAV and Re,T,a with relative humidity at high evaporative resistance. Because human trials are expensive, manikin data can reduce the cost by considering the static total evaporative resistance (Re,T,s). In fact, as the static evaporative resistance increases, the CAV increases in a similar fashion as Re,T,a. While the results look promising that Re,T,s can predict CAV, some validation remains, especially for high evaporative resistance. The data only supports air velocities near 0.5 m/s. [Description provided by NIOSH]
• Subjects:
  Environmental Exposure Heat Stress Disorders Hot Temperature Humidity Occupational Health Safety Temperature
• Keywords:
  Author Keywords: Clothing Clothing Clothing Adjustment Value Evaporative Resistance Exposure Levels Heat Stress Metabolic Rate Temperature Measurement Thermal Effects Thermal Stress WBGT

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• ISSN:
  0019-8366
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Florida ; OSHA Region 3 ; OSHA Region 4 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  NPPTL - National Personal Protective Technology Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  55
• Issue:
  6
• NIOSHTIC Number:
  nn:20050583
• Citation:
  Ind Health 2017 Nov; 55(6):549-554
• Contact Point Address:
  Prof. Thomas E. Bernard, College of Public Health, University of South Florida, 13201 Bruce B Downs Blvd, Tampa FL 33612-3805
• Email:
  tbernard@health.usf.edu
• Federal Fiscal Year:
  2018
• Performing Organization:
  University of South Florida, Tampa, Florida
• Peer Reviewed:
  True
• Start Date:
  20000930
• Source Full Name:
  Industrial Health
• End Date:
  20040929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:78e306321177aaa3ed14b6171f82bbf6073e7e8947d86b5c77f7e605f3dd241c8a0d3c738b319afe16728cbcbd47d568b2e014d799c39d5bbf20263159301813
• Download URL:
  https://stacks.cdc.gov/view/cdc/210872/cdc_210872_DS1.pdf
• File Type:
  [PDF - 725.81 KB ]