Detection and measurement method for heat conduction coefficient tester

Abstract

The invention discloses a detection and measurement method for a heat conduction coefficient tester. The measurement is implemented through a heat conduction coefficient standard plate and a surface thermometer. The measurement method comprises the steps of error measurement, temperature uniformity measurement, linear error measurement, repetitiveness measurement and working surface planeness measurement. Due to the mode, the detection and measurement method for the heat conduction coefficient tester has the advantages that the heat conduction coefficient standard plate and the surface thermometer are used for precisely measuring the measurement accuracy of the heat conduction coefficient tester; five performance key indexes, including the measurement error, the temperature uniformity, the linear error, the repetitiveness and the working surface planeness of the heat conduction coefficient tester are provided according to a theory of a protective hot surface method heat conduction coefficient tester, and a calculation method for corresponding performance parameters is also provided, so that the calibration of the heat conduction coefficient tester is realized.

Description

technical field [0001] The invention relates to the field of thermal conductivity testers, in particular to a detection and measurement method for thermal conductivity testers. Background technique [0002] Protected hot surface method thermal conductivity tester is a common instrument used in the construction industry to measure the thermal conductivity of materials. The instrument is suitable for measuring the thermal conductivity of homogeneous plate, gel and liquid materials under dry or different humidity conditions. The measurement performance of the thermal conductivity tester directly affects the reliability and accuracy of the thermal conductivity test data of the enterprise's products. At present, there is no reference measurement method for the detection of thermal conductivity testers in China. Now we can only refer to GB10294-2008 "Determination of Steady-state Thermal Resistance and Related Properties of Thermal Insulation Materials and Protected Thermal Surfa...

AI Technical Summary

Problems solved by technology

At present, there is no reference measurement method for the detection of thermal conductivity testers in China. Now we can only refer to GB10294-2008 "Determination of Steady-state Thermal Resistance and Related Properties of Thermal Insulation Materials and Protected Thermal Surface Method", DIN 52612-1- 1979 Two relevant technical standards of "TESTING OF THERMAL INSULATING MATERIALS; DETERMINATION OF THERMAL CONDUCTIVITY BY THE GUARDED HOT PLATE APPARATUS; TEST PROCEDURE AND EVALUATION" were carried out. There were inconsistent testing indicators and insufficient reliability of testing data, which made it difficult to meet the requirements of enterprise users.

[0003] At present, there are no corresponding technical specifications and standards for the detection and calibration of thermal conductivity testers at home and abroad. Now we can only refer to GB10294-2008 "Steady-state thermal resistance and related characteristics of thermal insulation materials. Surface Method", DIN 52612-1-1979 "TESTING OF THERMAL INSULATING MATERIALS; DETERMINATION OF THERMAL CONDUCTIVITY BY THE GUARDED HOT PLATE APPARATUS; TEST PROCEDURE AND EVALUATION" two related technical standards to evaluate its measurement performance, there is a detection method that is not scientific enough , the detection items are inconsistent, the evaluation indicators are vague, and the reliability of the detection data is not high, it is difficult to meet the requirements of enterprises and institutions

[0004] Only some colleges and universities in China have conducted relevant research, and no institution has yet carried out the calibration of thermal conductivity testers. They are still exploring how to calibrate the instrument accurately. Feasible and reliable detection and measurement methods are urgently needed to ensure the reliability of traceability.

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