Case Study Comparing Fiala-based Thermophysiological Model and PHS Index with Experimental Data to Predict Heat Strain in Protective Clothing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70565813%3A_____%2F21%3AN0000049" target="_blank" >RIV/70565813:_____/21:N0000049 - isvavai.cz</a>

Result on the web

<a href="https://www.extrica.com/article/21795" target="_blank" >https://www.extrica.com/article/21795</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21595/jme.2021.21795" target="_blank" >10.21595/jme.2021.21795</a>

Result language

angličtina

Original language name

Case Study Comparing Fiala-based Thermophysiological Model and PHS Index with Experimental Data to Predict Heat Strain in Protective Clothing

Original language description

The use of protective clothing under extreme conditions leads to heat stress with undesired consequences on human physiology. As a prevention measure, thermal indices and thermophysiological models have been developed. Based on these models and indices, it is possible to estimate the time limits for staying under risky conditions, e.g., by the predicted rectal temperature whose value is one of the most important parameters used for assessing the heat stress. This article is focused on the comparison of rectal and mean skin temperature prediction realized by the Fiala-based thermophysiological model (FMTK) and Predicted heat strain (PHS) index with results from the real experiment for normal and protective clothing. Three types of ensembles were tested and simulated as follows: Klimatex underwear, air-permeable military NBC suit M2000 (FOP), and impermeable chemical protective clothing Tychem-F. The real experiments of thermal strain were performed with one male participant (80 kg, 1.75 m) walking on the treadmill located in the climate chamber. The temperature range for neutral and hot tests was set from 25 °C to 40 °C. The rectal temperature, skin temperatures, and heart rate were measured. The results showed that PHS index is well usable for normal clothing (Klimatex underwear) and air-permeable protective clothing (FOP) under various ambient temperatures, and it is able to give results similar to FMTK model and experiment, the mean absolute error MAE for rectal temperature prediction was for all ambient temperatures lower than 0.5 °C. FMTK model demonstrated good predictability for impermeable protective clothing Tychem-F, the maximum value of MAE 0.69 °C. Whereas PHS index showed several times larger error, the maximum value higher than 1.8 °C, in the prediction for this type of clothing. The performed simulations showed that the accuracy of the prediction by the PHS index is not so strongly dependent on the value of the overall clothing resistance, but it depends on the value of the moisture permeability index (permeable vs impermeable clothing) which is connected with the water vapor partial pressure under the clothing.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10620 - Other biological topics

Project

<a href="/en/project/VH20182021036" target="_blank" >VH20182021036: Modern methods of detection and identification of dangerous CBRN compounds, methods for decreasing of their danger and decontamination; modern means of persons protection</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Measurements in Engineering

ISSN

2335-2124

e-ISSN

2424-4635

Volume of the periodical

9

Issue of the periodical within the volume

1

Country of publishing house

LT - LITHUANIA

Number of pages

12

Pages from-to

36-47

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-11111111111