Phase-change material melting latent heat measuring method and device

Abstract

The invention relates to the technical field of physical property measurement, and discloses a phase-change material melting latent heat measuring method and device. The measuring method comprises thefollowing steps: S1, inserting a heating rod into a sealed container, and filling a gap area between the heating rod and the sealed container with a phase-change material; S2, electrifying the heating rod, collecting the temperature on the outer wall surface of the heating rod in real time, monitoring the heating power of the heating rod, and obtaining the heat flux density on the outer wall surface of the heating rod and the current solid-liquid interface position of the phase-change material; and S3, establishing a heat balance equation based on the heating value of the heating rod and thelatent heat and sensible heat of the phase-change material, and obtaining the current melting latent heat value of the phase-change material. The device is simple in test structure and low in cost, can quickly measure the latent heat of fusion of the phase-change material, is convenient to operate, and realizes macroscopic large-dose measurement of the phase-change material so as to obtain macroscopic equivalent thermophysical properties of the phase-change material.

Description

technical field [0001] The invention relates to the technical field of physical property measurement, in particular to a method and device for measuring latent heat of melting of phase change materials. Background technique [0002] Phase change materials refer to a class of materials that undergo solid-liquid phase transitions by absorbing or releasing a large amount of latent heat within a certain temperature or temperature range. Phase change materials can realize large-capacity heat storage or release at a constant temperature, and have high heat storage density, compact structure, and good heat transfer. The characteristics of small loss and stable work can effectively solve the problem of mismatching in time and magnitude between the supply and use of heat energy in engineering practice. Therefore, phase change materials have a wide range of applications in solar energy utilization, power grid peak shaving and valley filling, building energy saving, room temperature ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a method and device for measuring the latent heat of melting of phase change materials, which is used to solve the problem of the high cost of existing devices for measuring the latent heat of melting of phase change materials, which cannot The problem of macroscopic large-dose measurement of phase change materials

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