Movable foam metal based phase-change energy-storage temperature control system and method thereof

Abstract

The invention discloses a movable foam metal based phase-change energy-storage temperature control system and a method thereof. The system is composed of a cavity, a phase-change material, a fixed foam metal framework, a movable foam metal framework and a memory alloy. The cavity is filled with the phase-change material. The fixed foam metal framework is fixed inside the cavity at one side close to a temperature control protection object. The movable foam metal framework and the fixed foam metal framework are adjacent to each other and are connected through the memory alloy. Memory temperature of the memory alloy is higher than melting temperature of the phase-change material. During the melting process, the memory alloy stretches to push the movable foam metal framework to cling to an interface of the liquid and solid phase and continuously move forwards with development of the interface of the liquid and solid phase. During the solidification process, the memory alloy contracts and returns to the initial position with the movable foam metal framework. By the utilization of the fixed foam metal framework, heat transfer at the interface resistance of the cavity and the phase-change material is enhanced; by the utilization of the movable foam metal framework, heat transfer at the solid-liquid interface resistance is enhanced; and by the utilization of the memory alloy, heat transfer at non-essential heat resistance of the remaining part is reinforced. While phase-change heat transfer is reinforced by the utilization of foam metal, inhibition of natural-convection heat transfer and loss of heat storage capacity are remarkably reduced.

Description

technical field [0001] The invention relates to the technical fields of new energy power generation and electric vehicles, in particular to a phase change energy storage temperature control system and method based on mobile metal foam. Background technique [0002] In recent years, with the rapid development of my country's new energy power generation and electric vehicle industry, the temperature control and protection of feeder terminal equipment (FTU for short) and storage batteries have become an important issue. Phase change materials have the advantages of high heat storage density, almost constant temperature during heat storage / release, wide distribution of melting points, stable chemical properties, and corrosion resistance, and are widely used in the field of passive temperature control protection. However, common phase change materials have low thermal conductivity and low energy storage efficiency, making it difficult to achieve efficient, rapid and uniform heat ...

AI Technical Summary

Problems solved by technology

However, the existence of metal foam will seriously inhibit the natural convective heat transfer of liquid phase change materials on the one hand, and on the other hand will cause a large loss of heat storage capacity of the system.

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