AI Article Synopsis
- A study used a physiological manikin to explore the relationship between firefighter heat loss and heat strain in different temperatures and humidity levels.
- Results indicated that the total heat loss (THL) index was effective in predicting heat strain in mild conditions (under 25 °C), while the evaporative resistance index was better in hotter conditions (over 35 °C).
- The study concluded that both indices should be used together to assess the heat strain performance of firefighter turnout clothing fabrics.
Article Abstract
A validated physiological manikin method was used to qualify environmentally dependent correlations between firefighter turnout total heat loss (THL) and intrinsic evaporative resistance () heat strain indexes and core temperature rise in stressful work conducted in mild (25 °C, 65% relative humidity [RH]) and hot (35 °C, 40% RH; 40 °C, 28% RH) conditions. Five turnout suit constructions representing a wide range of breathability were selected. The observed correlations between measured material heat loss and core temperature showed that the THL heat strain index accurately forecast thermal burden in mild environments (<25 °C); while the index provided accurate prediction in hot environments (>35 °C). They showed that the THL index did not predict heat strain in hot work environments. The findings of this study support incorporating both the and THL heat strain indexes as dual metrics for characterizing the heat strain performance of turnout clothing fabrics.
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| http://dx.doi.org/10.1080/10803548.2022.2058746 | DOI Listing |
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