System and method for testing cold-hot cycling stability of phase-change material
A technology for stability testing and phase change materials, applied in the investigation phase/state change and other directions, can solve the problems of large size of the stability testing system, small heat exchange area, waste of energy, etc., to speed up the stability testing speed and work reliably High performance, easy to disassemble and clean
Active Publication Date: 2020-05-08
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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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
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[0030] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.
[0031] The embodiment of the present application provides a system for testing the stability of phase change materials in cold and hot cycles, such as Figure 1 to Figure 8 As shown, 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 are provided with phase change materials, and the switching control module is used to change the circulation module and the second sample pool. The pipeline connection mode of the first sample pool and the second sample pool, the circulation mo...
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The invention provides a system and a method for testing the cold-hot cycling stability of a phase change material. The test system comprises a circulation module, a switching control module, a firstsample pool and a second sample pool, the phase change material is arranged in the first sample pool and the second sample pool; the switching control module is used for changing the pipeline connection mode of the circulation module, the first sample pool and the second sample pool; wherein the circulation module is connected with the first sample pool and the second sample pool, the circulationmodule changes state parameters of a heat exchange medium to enable the phase change material to absorb or release heat, the first sample pool and the second sample pool each comprise a bottom plate,a detachable heat exchange piece and a baffle, the heat exchange pieces are of a hollow structure, and the heat exchange pieces are fixed to the bottom plates through the baffles. The testing method comprises the following steps: increasing the temperature and the pressure of a heat exchange medium through the circulating module to enable the phase-change material in the second sample pool to absorb heat; and reducing the pressure and the temperature of the heat exchange medium through a circulating module to enable the phase change material in the first sample pool to release heat, and the like.
Description
technical field [0001] This application relates to, but is not limited to, the field of material testing, in particular, a testing system and testing method for realizing phase change material cold and hot cycle stability. 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. Applying phase change material to building materials can effectively reduce indoor energy consumption and save energy. Therefore, phase change materials are widely used . The thermal performance of phase change materials is mainly represented by four aspects: heat storage energy, phase transition temperature, thermal conductivity and stability, among which stability refers to the change of phase transition point and phase transition enthalpy of phase change materials after cold and heat cycles . [0003] A thermal cycle refers to a process of melting-solidification or solidification-melting of pha...
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Login to View More IPC IPC(8): G01N25/12
CPCG01N25/12Y02E60/14
Inventor 戚婷婷陈红霞李帆张晓菲杨正波
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED