Program control system and method for testing heat storage and release cycling performances of phase change material

Abstract

The invention discloses a program control system and method for testing the heat storage and release cycling performances of a phase change material. The system is used in the field of the phase change material heat storage and release cycling performance test. The system comprises a high temperature constant temperature bath, a low temperature constant temperature bath, a high temperature fluid circulation jacket, a low temperature fluid circulation jacket, a heat insulation diaphragm plate, an automatic lifting bar, a program controller, a data acquisition instrument and a phase-change material sample tube. Through the high temperature fluid circulation jacket and the low temperature fluid circulation jacket, phase change material melting heat storage and solidification heat release are realized so that the high temperature constant temperature fluid and the low temperature constant temperature fluid are completely separated. Through the heat insulation diaphragm plate, heat exchange between the high temperature fluid circulation jacket and the low temperature fluid circulation jacket is avoided. The automatic lifting bar realizes automatic switching of heat storage and heat release of the phase change material. The program controller realizes automatic control of the phase change material heat storage and release cycling performance test. Through the parameters recorded by the data acquisition instrument, the test on multiple-step heat storage and release cycling performances of the phase change materials is realized.

Description

technical field [0001] The invention belongs to the field of heat storage and discharge cycle performance testing of phase change materials, and in particular relates to a program control system and method for testing the heat storage and discharge cycle performance of phase change materials. Background technique [0002] Heat storage technology can effectively alleviate the contradiction between the supply and demand of heat energy in terms of time, location and intensity, and improve the efficiency of heat energy utilization. Compared with sensible heat storage technology, phase change heat storage technology has the advantages of high heat storage density, nearly isothermal heat storage and release process, small volume change, simple maintenance, and compact heat storage system. It can be used to recover industrial waste heat for mobile Heating can also be used in electronic device cooling, solar heat utilization, construction and aerospace and other fields. [0003] Th...

AI Technical Summary

Problems solved by technology

[0004] At present, there are mainly two types of test devices for the thermal cycle stability and heat resistance of phase change materials. Heat, to achieve the purpose of heat storage, after the heat storage is completed, move it into a low-temperature environment to cool and solidify, to achieve the purpose of exothermic, such a cycle, the shortcoming of this type of device is that the phase change material storage container is affected by the external environment and human factors during the movement process etc. affect the accuracy of the test, and the operation is complicated and the test efficiency is low; the second type of device is characterized in that the storage container of the phase change material is placed in a constant temperature environment, and a high-temperature fluid is introduced to melt the phase change material to store heat. The low-temperature fluid is introduced to solidify the phase change material and release heat, and the cycle is like this. The main limitation of this type of device is that only the same liquid at different temperatures can be used as the high-temperature fluid and low-temperature fluid, which narrows the temperature range of the phase change material heat storage and release test.

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