Accession Number:

AD0758989

Title:

Thermal Comfort Zones for Helium Oxygen Atmospheres at Reduced Pressures,

Descriptive Note:

Corporate Author:

DOUGLAS AIRCRAFT CO INC SANTA MONICA CALIF MISSILE AND SPACE SYSTEMS DIV

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

17.0

Abstract:

Thermal conductivity for a helium-oxygen mixture is 2.5 times greater than the conductivity of a nitrogen-oxygen mixture at 7 psia. A direct result of this difference is that the convective heat loss from man is higher in a helium atmosphere. Therefore, thermal comfort zones in helium should show an elevated comfort range. Measurements of human comfort zones at pressures of 5, 7 and 10 psia using a random walk technique were made in the Space Cabin Simulator. Air velocities, clothing, and atmosphere diluents were systematically varied. The data show that the mid-point of the comfort range for the clothed subject is highest for He-O2 at 7 psia and lowest for N2 - O2 at both 5 and 7 psia He-O2 at 5 psia mid way between these extremes. Author Modified Abstract

Subject Categories:

  • Stress Physiology
  • Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE