Integrated device for testing stability of phase change thermal storage material as well as method

Abstract

The invention discloses an integrated device for testing stability of a phase change thermal storage material as well as a method. The device is applied to testing of the stability of the phase changethermal storage material. The device comprises a reaction kettle, a heating / cooling oil bath, an electromagnetic valve, a vacuum pump, a protective gas circulating pump, a protective gas tank, a DSC(differential scanning calorimeter), an X ray polycrystalline diffraction instrument, an infrared spectrometer, a console, a temperature acquisition card and a data acquisition and processing system.The reaction kettle is utilized for providing a test space; the heating / cooling oil bath is utilized for circularly melting and solidifying a material at a constant temperature; the vacuum pump, the protective gas circulating pump and the protective gas tank are utilized for providing a protective gas environment; the console is utilized for controlling a test cyclic process; the temperature acquisition card is utilized for recording temperature variation of the material in the cyclic process; a measuring device is utilized for measuring enthalpy of phase change, a phase change temperature, acrystal structure, a molecular structure and chemical composition of the material after being cycled for multiple times; and the data acquisition and processing system is utilized for processing datainformation returned back by a temperature information acquisition card and the measuring device.

Description

Technical field [0001] The invention belongs to the field of performance testing of phase change heat storage materials, and specifically relates to an integrated testing device and method for cycle stability, thermal stability and chemical stability of phase change heat storage materials at medium and low temperatures. Background technique [0002] Phase change heat storage materials have gradually been widely used in industrial waste heat utilization, power peak-shift regulation, building energy saving, electronic thermal management and other occasions. In the actual use process, the phase change heat storage material is cyclically heated and melted and exothermic solidification, and its performance will decrease with the increase of the number of cycles. At the same time, the gas atmosphere during the cycle has a corresponding impact on the performance of the phase change heat storage material. Stability is an important indicator when selecting phase change heat storage materi...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used equipment for testing the stability of phase change heat storage materials is to heat and melt in test tubes or crucibles and then cool naturally at room temperature. There is no strict control of the test gas atmosphere, no constant temperature heating and constant temperature cooling, and no integrated measurement of phase change heat storage. Material cycle stability, thermal stability, chemical stability

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