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Thermal Manikin and Mathematical Modeling Evaluation of Military Head-worn Covers

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Technical Report,04 Sep 2018,25 Sep 2018

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Army Research Institute of Environmental Medicine Natick United States

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This report outlines biophysical properties of two different military head-worn covers, a prototype Afghanistan military cover and the current issue US Army patrol cover. This work describes the methods for calculating their biophysical inputs based on a whole human ensemble, and shows modeling results of the predicted thermoregulatory response differences between the two covers. Biophysical assessments show negligible differences between the prototype Afghanistan military cover AF and the current issue US Army patrol cover US. Thermal resistance values were comparable between the two AF 0.12 and US 0.12 m2KW 0.79 and 0.74 clo units. Evaporative resistance values were also similar AF 15.78 and US 15.94 m2PaW 0.47 and 0.44 permeability indices. Thermoregulatory modeling showed no differences over a two hour 120 minute period during both rest and moderate walking activity 1. This work concludes that from a biophysical and predicted thermal stress perspective there is no significant advantage of one cover versus the other.

Subject Categories:

  • Protective Equipment
  • Thermodynamics
  • Biology

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