METHOD FOR DETERMINING HEAT TRANSFER COEFFICIENT OF MATERIALS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC G01N25/18 G01K17/20 

FIELD: thermal physics.

SUBSTANCE: inventions relate to thermal physics and can be used to measure the value of the heat transfer coefficient of various materials. A method for determining the heat transfer coefficient of materials is proposed, which consists in measuring the surface temperature of the test sample, according to which two graduated samples of the same material as the heat-insulated body are alternately installed in the recess of the heat-insulated body, and the thickness of the first graduated sample coincides with the thickness of the walls and bottom of the heat-insulated body, the thickness of the second graduated sample is two equal to less than the thickness of the first graduated sample; then the samples are exposed to a heat flow, at the same time they are cooled in the climatic chamber with an electric fan, the temperature difference and the power consumption are determined; on the basis of the data, the heat transfer coefficient of the material of the heat-insulated body is calculated, after which a sample from various test materials is placed in a recess of the heat-insulated body, a heat flow is applied to the sample, and at the same time cooling is carried out in a climatic chamber; the temperature difference and power consumption are determined; based on the data, the heat transfer coefficient of the materials of the test sample is calculated. Also proposed is a device for determining the heat transfer coefficient of materials, containing a heat-insulated case, inside which there are an electric heater, thermocouples, a thermostat sensor and an electric fan, while the output of the electric heater is used for connection to an electric meter. The device also contains a climatic chamber, inside of which there is a heat-insulated casing with the same thickness of side walls and bottom, an electric fan and a thermostat are attached to the inner side of the climatic chamber, and a thermally insulated casing in the upper part is made with protrusions to accommodate the test sample.

EFFECT: increasing the accuracy of determining the heat transfer coefficient of materials.

2 cl, 4 dwg