Accession Number : ADA637325


Title :   Method for Estimating Evaporative Potential (IM/CLO) from ASTM Standard Single Wind Velocity Measures


Descriptive Note : Technical rept. 2015-2016


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


Personal Author(s) : Potter, Adam W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a637325.pdf


Report Date : 10 Aug 2016


Pagination or Media Count : 16


Abstract : Three key biophysical parameters of interest when modeling thermoregulatory responses include: thermal resistance (Rct), evaporative resistance (Ret), and wind coefficients (g) specific to each resistance. Using a thermal sweating manikin, biophysical properties (Rct and Ret) were measured on 65 different clothing ensembles. A stepwise forward adding linear regression method was used to create an estimation equation (n = 20); where standard 0.4 m/s measures of im/clo can be converted to modeling inputs at 1 m/s: im/clo(1.48) -0.04 (R2 = 0.998). Root mean squared error (RMSE) and mean absolute error (MAE) of a verification dataset (n = 45), showed close agreement of the estimated and actual measured values of im/clo at 1 m/s, RMSE = 0.013 and MAE = 0.009. This report describes the mathematical methods for estimating the biophysical inputs needed for thermoregulatory modeling using only the data provided by standardized test methods. This method enables use of standard collected data, American Society of Testing and Materials International (ASTM) method, for modeling purposes that previously required additional testing.


Descriptors :   *TEMPERATURE CONTROL , ANATOMICAL MODELS , BIOPHYSICS , CLOTHING , LINEAR REGRESSION ANALYSIS , MATHEMATICAL MODELS , PHYSIOLOGICAL EFFECTS , PREDICTIONS , RESPONSE(BIOLOGY) , THERMAL RESISTANCE


Subject Categories : Anatomy and Physiology
      Statistics and Probability


Distribution Statement : APPROVED FOR PUBLIC RELEASE