Novel heat conductivity coefficient test apparatus and heat conductivity coefficient test method

Abstract

The invention relates to a novel heat conductivity coefficient test apparatus and a heat conductivity coefficient test method. The apparatus includes a test device, a refrigerating system, a heating system, a water circulation system and a data collection and control system. A plugging device is arranged in the test device so that the interior of a sample is isolated from a test case, thereby simulating an actual use environment of the sample. Average temperature of different positions in interior of the test device and electric power consumed within a certain time, after heat transmission of the heating system is stabilized, are tested, and two times of contrast tests with same test parameters and test methods are carried out to a sample with a heat insulation material and a sample without the heat insulation material, wherein subtraction calculation is carried out with electric power to eliminate test error, thereby accurately calculating the heat conductivity coefficient of the heat insulation material. The apparatus and the method can directly test the heat conductivity coefficient of a tubular sample. A test process is simple, is convenient to carry out, has high accuracy and greatly improves practicability of the apparatus.

Description

technical field [0001] The invention relates to a novel thermal conductivity testing device, in particular to a testing device for directly testing the thermal conductivity of the insulation layer material of a pipeline. Background technique [0002] Insulation materials are the main method of pipeline insulation, and the thermal conductivity of insulation materials is one of the important parameters in its performance. Therefore, more accurate testing of thermal conductivity of insulation materials is of great significance to the development of new materials and the detection of parameter performance. . At present, the measurement of the thermal conductivity of the insulation layer material of the pipeline is through the measurement of the plate-shaped test piece, which can accurately measure the steady-state heat transfer performance. However, the relatively complicated test procedure of the plate-shaped specimen is the main problem faced in the thermal conductivity test ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, a new thermal conductivity test device based on the steady-state method is proposed. This device directly measures the thermal conductivity of the insulation layer material of the pipeline, which overcomes the relative process in the existing thermal conductivity measurement method. Complex questions, making the testing process simple, accurate and more in line with actual requirements

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