TY  - JOUR
PY  - 1988//
TI  - The physiologic determination of the vapor permeation efficiency of clothing
JO  - International journal of industrial ergonomics
A1  - Kenney, W. Larry
SP  - 115
EP  - 120
VL  - 3
IS  - 2
N2  - Two calculations of the coefficient for vapor permeation efficiency (Fpcl) have been proposed for use in the rational (heat balance) approach to heat stress problems caused by wearing protective clothing--one proposed by Candas et al. (1987) and a second (derived from Ke[eta]') proposed by Kenney et al. (1987). Both of these coefficients are based on the concept of sweating efficiency and each is used in the calculation of Emax, the maximal evaporative capacity of the environment. This paper compares these 2 approaches based on data collected across several clothing ensembles common to industry. In general, the lighter and more permeable the ensemble, the closer the agreement between the two coefficients. However, as clothing becomes impermeable (e.g., vapor-barrier clothing made of plastic, coated Tyvek(R), etc.), use of the former Fpcl significantly overestimates Emax. It is suggested that either calculation can be used for lightweight clothing (although Candas Fpcl is simpler to calculate) but that the Fpcl calculated by Kenney and co-workers is preferable for heavier ensembles.<p />
LA  - 
SN  - 0169-8141
UR  - http://dx.doi.org/
ID  - ref1
ER  -