Accession Number : ADA311468

Title :   A Simplified Modeling Approach for Estimating Heat Loss During Cold Exposure.

Descriptive Note : Technical rept.,

Corporate Author : ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA

Personal Author(s) : Santee, William R.

PDF Url : ADA311468

Report Date : JUN 1996

Pagination or Media Count : 34

Abstract : Equations to predict heat debt (D) and survival time (ST were derived from a simple ration model (Burton and Edholm, 1955) that predicted the clothing in insulation (lr). The methodology is analogous to a more complex approach derived by Holmer 1984) to calculate required insulation (IREQ) and survival times. The derived equations parallel simple models developed by other investigators (Tikulsis and Frim, 1995 , but are explained in sufficient detail to allot other users to fully understand the methods and to develop variations of the basic model. The derived equations are used to calculate values for comparison to both theoretical and experimental results. The equation development process demonstrates both basic heat transfer principles and the derivation of a simple model. Other equation modifications are suggested provide insight into how basic models may be used in conjunction with experimental data I develop more sophisticated models. The equations may be used to generate predictions that may be used as simple alternative hypotheses for cold exposure modeling validation studies.

Descriptors :   *LOW TEMPERATURE, *STRESS(PHYSIOLOGY), *EXPOSURE(PHYSIOLOGY), *PROTECTIVE CLOTHING, *HEAT LOSS, *BODY TEMPERATURE, EXPERIMENTAL DATA, MODELS, MODIFICATION, MODEL THEORY, TIME, HYPOTHESES, EQUATIONS, SURVIVAL(PERSONNEL), RATIONS, SIMPLIFICATION, HYPOTHERMIA, SLEEPING BAGS, COLD TOLERANCE.

Subject Categories : Anatomy and Physiology
      Medicine and Medical Research
      Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE