Accession Number:

ADA634304

Title:

Heat Strain Evaluation of U.S. Navy Steam Suit Ensembles

Descriptive Note:

Technical rept. 2015-2016

Corporate Author:

ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA BIOPHYSICS AND BIOMEDICAL MODELING DIV

Report Date:

2016-05-01

Pagination or Media Count:

21.0

Abstract:

A manikin testing and modeling approach was used to predict the heat strain while wearing a Prototype Steam Suit Ensemble PSSE or the current U.S. Navy Submarine Steam Suit Ensemble SSSE and working in a steam-filled environment 88 deg C, 100 relative humidity or a training environment 24 Degrees C, 65 relative humidity. Both ensembles were tested on a thermal manikin to measure thermal resistances. Metabolic rates during walking at 1.8 ms 4 mph and wearing the PSSE or the SSSE were estimated using an empirical equation. The six cylinder thermoregulatory model SCTM was used to simulate human thermal responses and determine the heat endurance times. Results showed that the PSSE performance improves, relative to the SSSE. The PSSE 1 increases thermal resistance by 70, indicating more protection from external heat load 2 reduces metabolic rates due to reduction in weight and possibly less hobbling and 3 increases the predicted heat endurance times to about 33 min in a steam-filled environment. The analysis is limited to heat stress only and excludes all other possible injuries, such as burn injury.

Subject Categories:

  • Medicine and Medical Research
  • Stress Physiology
  • Military Forces and Organizations
  • Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE