MODELLING OF HEAT AND MOISTURE LOSS THROUGH NBC ENSEMBLES

Authors
  1. Cain, B.
  2. Osczevski, R.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The report summarizes work done to model the heat and moisture transport through various NBC clothing ensembles. The analysis involves simplifying the three dimensional physical problem of clothing on a person to that of a one dimensional problem of flow through parallel layers of clothing and air. Body temperatures are calculated based on prescribed work rates, ambient conditions and clothing properties. Sweat response and respiration rates are estimated based on empirical data to provide appropriate boundary conditions at the skin. Core and skin temperatures are calculated during the analysis and reported as functions of time for four different clothing ensembles. Evaporative heat loss was found to be the dominant heat loss mechanism. Estimates of the rate of sweat evaporation through the clothing ensembles is made. The predicted temperature response, although not exact, are comparable to results from physiological experiments but somewhat lower. TRUNCATED
Report Number
DREO-TN-91-39 — Technical Note
Date of publication
15 Nov 1991
Number of Pages
30
DSTKIM No
92-00845
CANDIS No
103739
Format(s):
Hardcopy;Originator's fiche received by DSIS

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