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The
effective heat transfer around the segments of the human body
varies depending on the dimension and orientation of the body
concerned in the wind flow, the inertial and the viscous
properties of the air. The physiological methods in
determining heat transfer are direct calorimetry, partition
calorimetry, mathematical modeling of heated wet skin, etc.
These techniques have limitations as to the well-designed
laboratory setup, equipment used and limitations of open field
applicability. With the concept of mass transfer through
naphthalene sublimation principle, direct determination of
heat transfer coefficients of the human was undertaken and the
mathematical aspects of heat exchange phenomena have been
worked out. This allows determination of heat transfer under
conditions of different types of physical activity and,
therefore, the technique has field application in terms of
heat stress assessment in industry. However, there is a need
for extensive validation of the methodology in well-designed
experimental set up. The development is primarily of
theoretical in nature and an addition to the existing
knowledge. A Well-designed calibration procedure allows
reproducibility of results.
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