A test system and test method for realizing the stability of cold and heat cycles of phase change materials

Abstract

The present application provides a test system and test method for realizing the stability of cooling and heating cycles of phase change materials. The test system includes a circulation module, a switching control module, a first sample pool and a second sample pool. The first sample pool and the second sample pool There is a phase change material in the sample cell. The switching control module is used to change the pipeline connection method between the circulation module and the first sample cell and the second sample cell. The circulation module connects the first sample cell and the second sample cell. The circulation module changes The state parameter of the heat exchange medium is to make the phase change material absorb or release heat, the first sample cell and the second sample cell both include a bottom plate, a detachable heat exchange fin, and a baffle plate, the heat exchange fin is a hollow structure, and the exchange The hot plate is fixed on the bottom plate through the baffle. The test method includes: increasing the temperature and pressure of the heat exchange medium through the circulation module, so that the phase change material in the second sample cell absorbs heat; the heat exchange medium reduces the pressure and temperature through the circulation module, so that the phase change material in the first sample cell releases heat and so on.

Description

technical field [0001] The present application relates to, but is not limited to, the field of material testing, in particular to a testing system and testing method for realizing the stability of cooling and heating cycles of phase change materials. Background technique [0002] Phase change material is a new type of energy storage material that uses latent heat of phase change to store and release energy. The application of phase change material to building materials can effectively reduce indoor energy consumption and save energy. Therefore, phase change materials are widely used. . The thermal properties of phase change materials are mainly represented by four aspects: heat storage energy, phase transition temperature, thermal conductivity, and stability. . [0003] A heating and cooling cycle refers to a melting-solidification or solidification-melting process of the phase change material, while the cycle stability test of the A-level phase change material needs to go...

AI Technical Summary

Problems solved by technology

The cold and heat sources cannot be in direct contact with the phase change material, and the heat exchange area is small, so it takes 45 to 200 minutes to realize a cold and heat cycle, which is very time-consuming; the cold and heat sources are placed separately, and the stability test system is large in size, which is always difficult for the cold and heat sources. Constant temperature, waste of energy

In addition, building materials such as gypsum and cement will solidify after condensation during testing, and have strong adhesion to the sample container, making it difficult to remove

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