TY - JOUR
T1 - Prediction of WBGT-based clothing adjustment values from evaporative resistance
AU - Bernard, Thomas E.
AU - Ashley, Candi D.
AU - Garzon, Ximena P.
AU - Kim, Jung Hyun
AU - Coca, Aitor
N1 - Publisher Copyright:
© 2017 National Institute of Occupational Safety and Health.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
KW - Clothing
KW - Clothing adjustment value
KW - Evaporative resistance
KW - Thermal stress
KW - WBGT
UR - http://www.scopus.com/inward/record.url?scp=85037865291&partnerID=8YFLogxK
U2 - 10.2486/indhealth.2017-0121
DO - 10.2486/indhealth.2017-0121
M3 - Artículo
C2 - 29033404
AN - SCOPUS:85037865291
SN - 0019-8366
VL - 55
SP - 549
EP - 554
JO - Industrial Health
JF - Industrial Health
IS - 6
ER -