Method for measuring thermophysical properties of phase change material

Abstract

The invention provides a method for measuring thermophysical properties of phase change material. The method comprises: establishing a theoretical analysis model for a one-dimensional constant heat flow melting process of the phase change material; obtaining a temperature response curve of the phase change material sample during heating and melting process under constant heat flow heating conditions; and using the theoretical analysis model to calculate the thermophysical properties of the phase change material. The thermophysical properties comprises melting point, solid phase specific heat capacity, liquid phase specific heat capacity, latent heat of fusion and thermal conductivity. According to the method for measuring thermophysical properties of phase change material has the advantages of simple device and low cost; the test speed is fast, and the test can be completed in about 10 minutes; the macroscopic large sample can be tested to obtain the macroscopic equivalent thermophysical properties of the composite anisotropic phase change material; a number of important thermophysical data which comprising melting point, solid phase specific heat capacity, liquid phase specific heat capacity, latent heat of fusion and thermal conductivity can be obtained by one measurement.

Description

technical field [0001] The invention relates to the field of measuring thermophysical properties of materials, in particular to a method for measuring thermophysical properties of phase change materials. Background technique [0002] Phase change material is a kind of material that undergoes solid-liquid phase transition at a specific temperature and absorbs (or releases) a large amount of latent heat of phase change. It is widely used in the field of thermal energy storage to solve the problem of time mismatch between energy supply and use, and improve energy efficiency. For example, in terms of solar thermal utilization, phase change materials can store the instantaneous fluctuating solar radiation and supply it with stable output power for subsequent use, such as power generation, refrigeration, hot water supply, hot air supply, etc. There will also be large fluctuations in the electricity load in the alternation of day and night and the four seasons cycle, which will ha...

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Problems solved by technology

[0007] The embodiment of the present invention provides a method for measuring thermal physical properties of phase change materials, which is used to solve the problems in the prior art that the equipment needs to be imported, the test cost is high, the measurement time is long, and multiple devices are required for measurement, and a low-cost, fast , Efficient method for measuring thermophysical properties of phase change materials

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