FIELD: thermophysical measurements.
SUBSTANCE: invention relates to the field of thermophysical measurements and is intended for measuring the thermal conductivity of solids. Two heterogeneous samples of the same shape with specified thicknesses and with the same cross-section are used. The samples are brought into thermal contact along the plane of their cross-section. In this plane, internal heat drain is evenly distributed over it. Unidirectional and evenly distributed in plane external heat sources are placed on the outer planes of the samples parallel to the plane of thermal contact of the samples. The power of the internal heat drain is set and stabilized in time. The capacities of external heat sources are regulated so that the same set stationary temperature differences are established on the samples. The achieved capacities and stationary temperature differences equal to each other on the samples are measured. Then, with the constant power of the internal heat drain, the equal set capacities of external heat sources are set and the achieved stationary temperature differences on the samples are measured. According to the obtained data, the desired thermal conductivity of the samples is calculated. At the same time, the optimal ratio of sample thicknesses is previously found, which is determined by calculation, based on the specified temperature differences and the specified capacities of external heat sources.
EFFECT: increasing accuracy of measuring the thermal conductivity of solids.
1 cl, 2 dwg
