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Clothing Test Methods, Edited by L.H. Newburgh (Physiological Tests) and Milton Harris (Physical Tests) of Subcommittee on Clothing of the National Research Council (U.S.A.) (1945) / Chapter Skim
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Insulation of Ambient Air and Cooling Effect of Moving Air (Burton)
Pages 37-40

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From page 37...
... The answer to this objection is that the heat loss by convection also changes with the ambient temperature but in the opposite sense, and the resultant total heat loss in ordinary cases, where emissivity of surfaces is high, is practically unchanged at low temperatures. Heat loss by convection, for a given velocity of air movement, increases as the density of the air increases with lowered temperature.
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From page 38...
... These will be accurate to within about 0.05 Clo over the working range. • Table 2 Standard Values of JA to be Used at all Temperatures Insulation Clo Units 0.1 0.15 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.85 Air Movement Ft./Min.
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From page 40...
... Selection An attempt should be made to select experimental subjects who are not old,er than thirty years of age. In the medical history there should be no record of having been intolerant to either heat or cold, nor having had any previous untoward results following exposure to climatic extremes.
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Key Terms

  • heat loss
  • low temperatures
  • total heat
  • clo units
  • experimental subjects

  • standard values
  • exaggerated physiological
  • values recommended
  • clo determinations
  • heat cramps

  • subjects participating
  • resultant total
  • heat prostration
  • eight subjects
  • air increases

  • air space
  • various air
  • select experimental
  • values advocated
  • previously resistant

  • clothed human
  • lowered temperature
  • ambient temperatures
  • climatic research
  • heat losses

  • low ambient
  • temporary exaggerated
  • temperatures insulation
  • changed density
  • insulation clo


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