Device and method for measuring relative heat conductivity coefficient of phase change member by radiant heat exchange method

Abstract

The invention provides a device for measuring a relative heat conductivity coefficient of a phase change member by a radiant heat exchange method. The device comprises a test box, a multi-path temperature inspection instrument and a temperature control instrument, wherein the test box comprises a light source chamber, a heat insulation chamber, a first temperature control chamber, a first temperature measuring chamber, a second temperature control chamber and a second temperature measuring chamber; the light source chamber is internally provided with a light source; the first temperature control chamber is internally provided with a first electric heating wire and a first thermoelectric couple; the first temperature measuring chamber is internally provided with a second thermoelectric couple; the second temperature control chamber is internally provided with a second electric heating wire and a third thermoelectric couple; the second temperature measuring chamber is internally provided with a fourth thermoelectric couple; a first test box end wall is arranged at the right side of a standard member; a second test box end wall is arranged at the right side of the phase change member; the first test box end wall and the second test box end wall are detachable. A method and the device for measuring the relative heat conductivity coefficient of the phase change member take radiant heat storage as a main heat storage manner.

Description

technical field [0001] The invention relates to a device and method for measuring thermal conductivity of materials, in particular to a device and method for measuring relative thermal conductivity of phase change components. Background technique [0002] At present, the experimental test data of domestic and foreign researchers have shown that the thermal conductivity of phase change materials will change greatly with the change of temperature in the phase change interval, and compared with the thermal conductivity of solid phase and liquid phase, the difference is relatively large. Big. This has brought great difficulties to the evaluation of the thermal conductivity of phase change components mixed with phase change materials. The thermal conductivity of phase change materials in the phase change range is not only affected by the characteristics of the material itself, but also by the storage and discharge of latent heat caused by the phase change and the natural convect...

AI Technical Summary

Problems solved by technology

In this way, it is difficult to theoretically explain and evaluate the thermal conductivity of phase change materials in the phase change interval simply from the thermal conductivity.

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