One-dimensional heat exchange phase change process testing device and method of waxy phase change material

Abstract

The invention discloses a device and method for testing the one-dimensional heat exchange phase change process of a waxy phase change material. The device includes four parts: a hydraulic system, an upper water pool, a lower water pool, and a sealed tank. The hydraulic system includes oil tank, liquid level sensor, hydraulic pump, drive motor, one-way valve, pressure regulating valve, stop hand valve, pressure sensor, rubber bladder; the upper pool includes the upper water tank, the upper cold and heat exchanger, and the upper temperature sensor; the lower pool Including the lower water tank, the lower cooling and heat exchanger, and the lower temperature sensor; the sealed tank includes the heat conduction upper cover, the heat conduction lower cover, the ceramic pipe wall, the bolts, the fluid inlet check valve, the fluid outlet check valve, the fluid inlet plug, the fluid outlet plug head. The device of the present invention is capable of carrying out one-dimensional heat exchange phase change process testing and material performance evaluation of phase change materials, phase change materials and nano powder mixtures with enhanced thermal conductivity under various temperature and pressure conditions, and has the advantages of accurate measurement, continuous acquisition, and high degree of automation , Versatility and other advantages.

Description

Technical field [0001] The present invention belongs to the field of phase-change drive technology, particularly relates to a waxy-based one-dimensional phase change material phase change heat exchange apparatus and method for testing. Background technique [0002] Driving a phase change material using a solid - the drive mode change in volume resulting liquid phase is achieved during variations of external work, wherein the phase change material is the key driver of the phase change, the phase change material absorbs a phase transition temperature at a point near after the transition from the solid phase to liquid phase transition and after sufficient heat to achieve volume expansion, sufficient heat is released from the liquid phase or a solid phase and to achieve volume reduction. Phase-change drive unit does not require additional power or control, ambient temperature changes can only rely on the completion of the driving process, saves energy and having an output characteris...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing phase change material testing devices use methods such as the Archimedes principle measurement method, the liquid discharge observation method, and the gas pressure indirect measurement method. The above methods still have many deficiencies. The influence of volume change rate and thermal conductivity; 2. The accuracy of human eye observation and recording data is low and cannot be recorded continuously in real time; 3. There are many thermal interference factors, and phase change materials cannot realize the ideal one-dimensional heat exchange phase change process, which affects test accuracy

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