ERRORS IN HEAT FLUX MEASUREMENTS DUE TO THE THERMAL RESISTANCE OF HEAT FLUX DISKS

Authors
  1. Ducharme, M.B.
  2. Frim, J.
  3. Tikuisis, P.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Physiology
Abstract
Questions have been raised regarding the effect of the thermal resistance of heat flux transducers (HFTs) on the thermal flux from the skin. A model capable of simulating a large range of "tissue" insulation (variable-R model) was used to study the effect of the underlying tissue insulation on the relative error in heat flux due to the thermal resistance of the HFTs. The data show that the deviation from the true value of heat flux increases as the insulation of the underlying tissue decreases (r = 0.99, P < 0.001). The underestimation of the heat flux through the skin measured by an HFT is minimal when the device is used on vasoconstricted skin in cool subjects (3-13% error) but becomes important when used during vasodilation in warm subjects (29-35% error) and even more important on metallic-skin mannequins (>60% error).
Report Number
DCIEM-90-P-27 — Research Paper; Reprint
Date of publication
01 Jan 1990
Number of Pages
9
Reprinted from
J Appl Physiol, vol 69 no 2, 1990, p 776-784
DSTKIM No
90-04749
CANDIS No
66981
Format(s):
Hardcopy;Originator's fiche received by DSIS

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