Method for calculating heat storage of composite phase change material based on transient integration of equivalent specific heat capacity

Abstract

The present application relates to the technical field of heat energy storage and conversion, and discloses a composite phase change material heat storage capacity calculation method based on equivalent specific heat transient integration, comprising the following steps: preparing a nano-particle enhanced composite phase change material; measuring the material by a differential scanning calorimeter to obtain a curve of transient change of equivalent specific heat of the material with temperature; discretizing a heat accumulator filled with the material into a plurality of control volumes, and monitoring the average temperature of each volume in real time through temperature measuring points; based on the specific heat curve, integrating each control volume according to its real-time temperature and initial temperature, and then superimposing the heat storage capacities of all control volumes to obtain the total heat storage capacity. The present application combines accurate material properties with a real system space temperature field, not only improves the accuracy of heat storage capacity calculation, but also dynamically calculates instantaneous heat storage power, and has strong engineering applicability.

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