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A method and testing device for simultaneously identifying thermal conductivity and heat capacity of materials

A technology of thermal conductivity and equation, applied in the direction of thermal development of materials, etc., can solve the problems of large error in multi-parameter simultaneous identification results, high measurement cost, complex process, etc., to avoid repeated tests, save test costs, and improve efficiency.

Active Publication Date: 2017-12-15
HARBIN INST OF TECH
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Problems solved by technology

Generally, there are two ways to determine the thermal physical parameters of materials, namely direct test and calculation. The direct measurement method is more complicated and the measurement cost is higher. Repeated testing, the efficiency is low; and the calculation method has a large error in the simultaneous identification of multiple parameters

Method used

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  • A method and testing device for simultaneously identifying thermal conductivity and heat capacity of materials
  • A method and testing device for simultaneously identifying thermal conductivity and heat capacity of materials
  • A method and testing device for simultaneously identifying thermal conductivity and heat capacity of materials

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Embodiment Construction

[0058] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0059] Such as figure 1 As shown, a method for simultaneously identifying the thermal conductivity and heat capacity of a material according to an embodiment of the present invention, the method includes:

[0060] Step 101: Measure the emissivity of the surface of the test material.

[0061] Step 102: Measure the heat flux on the surface of the test material.

[0062] Step 103: Measure the temperature history inside the test material.

[0063] Step 104: Obtain the thermal physical property parameters of the test material.

[0064] Step 105: When the thermophysical parameters of the test material are known, use the boundary conditions and initial conditions of the material to calculate the temperature distribution inside the material.

[0065] Prefera...

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Abstract

The present invention provides a method and testing device for simultaneously identifying the thermal conductivity and heat capacity of a material, the method comprising: measuring the emissivity of the surface of the test material; measuring the heat flux density of the surface of the test material; measuring the temperature history inside the test material; Obtain the thermal physical parameters of the test material; when the thermal physical parameters of the test material are known, use the boundary conditions and initial conditions of the material to calculate the temperature distribution inside the material, and obtain the thermal conductivity and heat capacity of the test material as it changes with temperature.

Description

technical field [0001] The invention relates to the technical field of material analysis, in particular to a method and a test device for simultaneously identifying the thermal conductivity and heat capacity of materials. Background technique [0002] In recent years, with my country's emphasis on energy conservation and the increasing requirements for heat protection, the identification of thermal physical parameters of materials has received more and more attention. Generally, there are two ways to determine the thermal physical parameters of materials, namely direct test and calculation. The direct measurement method is more complicated and the measurement cost is higher. The efficiency of repeated testing is low; and the calculation method has a large error in the simultaneous identification of multiple parameters. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method and testing device for simultaneously...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
Inventor 易法军潘威振孟松鹤金华朱燕伟
Owner HARBIN INST OF TECH
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