Accession Number:

ADA050542

Title:

Development and Evaluation of Heat Transfer Equations for a Model of Clothed Man,

Descriptive Note:

Corporate Author:

ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS

Personal Author(s):

Report Date:

1977-03-01

Pagination or Media Count:

20.0

Abstract:

Two equations have been derived for heat transfer from a cylinder. The cylinder had a wet surface and was wrapped with a layer having uniform properties. One equation is a special case of the other, a more general equation. The equation for the special case is equivalent to equations currently being used to describe heat transfer from clothed men. The special case implies that current equations are valid when sweat evaporates at the body skin surface only, i.e. no evaporation may occur at the clothing surface. Both forms of the equations gave good representation of the steady state data which were obtained from studies on a clothed, heated manikin with either a wet or dry skin r 0.99. The clothing resembled industrial clothing. Skin and hence clothing wetness increased the conductance of sensible heat by 32. Failure to account for this effect caused insensible heat transfer to be underestimated by 13 and a systematic error was introduced into the prediction of total heat transfer. Author

Subject Categories:

  • Stress Physiology
  • Thermodynamics
  • Protective Equipment
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE