SYMPOSIA PAPER Published: 01 January 1957
STP43657S

Thermal Conductivity of Insulation Containing Moisture

Source

A transient heat flow method based on the theory of an infinite line heat source was found suitable for the measurement of the thermal conductivity of insulation containing moisture. The measurement is fast and the temperature rise small. The results indicate, however, that vapor movement is not eliminated and that the measurement includes a latent heat effect as well as sensible heat conduction.

The thermal conductivity of three representative insulating materials was tested in a wide range of moisture content at two temperatures—above and below freezing. These results suggest that the properties of an insulation, especially its vapor permeability, characterize its behavior when wet.

The information presented is of a fundamental nature not suitable for immediate use in field installation problems.

Author Information

Joy, F.
The Pennsylvania State University, University Park, Pa
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Details
Developed by Committee: C16
Pages: 65–80
DOI: 10.1520/STP43657S
ISBN-EB: 978-0-8031-5946-4
ISBN-13: 978-0-8031-6100-9