Determining Energy Requirements For Heated Clothing and Individual Equipment Using Manikin and Modeling Methods
Abstract
This study determines the energy requirements of silver nanowire heated CIE through the use of thermal manikin measurements and thermoregulatory modeling. The biophysical properties (thermal resistance and evaporative resistance) of the five configurations were measured on thermal manikins. A thermoregulatory model was modified to include input that considers the heat flux from the heated CIE to the skin. Modeling conditions included -40 degrees C air temperature, 1 m/s wind speed, and sedentary activity. The model predicted skin temperatures (Ts) of the hand, foot, and torso. The predicted power requirements for heated CIE are 20 W, 40 W, and 55 W for the hand, foot, and torso regions, respectively. Providing 55 W of heating to the torso does not show an improvement in the hand or foot Ts when compared to the unheated configuration. However, 100 W of heating to the torso predicts longer endurance time and tissue freeze time. Heating the hand, foot, and torso simultaneously does not appear to provide a benefit to the hand Ts, but indicates a potential benefit to the foot Ts.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2022
- Accession Number
- AD1179652
Entities
People
- Elizabeth Hirst
- Michael P. Castellani
- Paola D'angelo
- Timothy P. Rioux
- Xiaojiang Xu
Organizations
- United States Army Research Institute of Environmental Medicine