Abstract
In this paper, a simple and rapid measurement of the thermal conductivity of insulation materials at low temperature was achieved by a transient hot wire method.
Firstly a convenient device to maintain a given low temperature was made and the thermal conductivity of several insulation materials was measured in the range from liquefied nitrogen temperature to room temperature. In the measurement, an anisotropic nature in the insulation materials was considered. The conductivities estimated by the hot wire method were then compared with those values obtained by a one-dimensional steady state method.
Consequently, it was found that when the anisotropic nature was considered both the values agree within the deviation of 5-10% and the hot wire method is able to apply for the measurement of the thermal conductivity of insulation materials.
