HEAT FLUX TRANSDUCER MEASUREMENT ERROR: A SIMPLIFIED VIEW

Authors
  1. Frim, J.
  2. Ducharme, M.B.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Heat flux transducers (HFTs) provide a simple and direct measurement of body heat exchange. Regrettably, HFTs perturb the heat flux at the measurement site, resulting in underestimation of the true heat flux. Equations to correct the discrepancy are available, but most require high-precision temperature measurements above and/or below the transducer and/or deep within the body tissues. Because this is not always feasible, the equations are of limited practical benefit. A theoretical basis for the magnitude of the correction factor in relation to the thermal resistance of the materials both above and below the HFT has been developed and has been verified experimentally. The theory is presented in a graph that can be used to derive the HFT correction factor directly or as a guide to know that heat flux was measured within a certain accuracy. This may obviate the use of complicated procedures and equations to perhaps needlessly apply a small correction factor to HFT data.
Report Number
DCIEM-91-31 — Reprint
Date of publication
01 Apr 1991
Number of Pages
5
Reprinted from
J Appl Physiol, vol 74, no 4, 1993, p 2040-2044
DSTKIM No
93-02602
CANDIS No
131363
Format(s):
Hardcopy;Originator's fiche received by DSIS

Permanent link

Document 1 of 1

Date modified: