Fractal netty phase change energy storage device

Abstract

The invention discloses a fractal netty phase change energy storage device. The fractal netty phase change energy storage device consists of an energy storage unit body and a refrigerating medium channel; the refrigerating medium channel is positioned in the energy storage unit body; the energy storage unit body consists of a shell, a heat transfer rib sheet and a phase change material; the heat transfer rib sheet adopts a fractal netty structure and is arranged in a shell; a non-heat-transfer rib sheet area in the shell is filled with the phase change material; and the heat transfer rib sheetadopts a fractal netty structure, the grade number is m grade, m is more than or equal to 2 and is an integer, the dispersing coefficient N of each grade of heat transfer rib sheet is equal to 4, namely, each j-th grade of heat transfer rib sheet generates 4 (j+1) grade heat transfer rib sheet, and the center of the (j+1) grade heat transfer rib sheet is positioned at four vertex angles of the j-th grade heat transfer rib sheet. The feature of the fractal netty structure is utilized, the effective heat exchange area of the energy storage device is increased and the heat exchange dead area ina tank body is reduced; meanwhile, the effective heat conducting coefficient between the heat transfer rib sheet and the phase change material is increased, and rapid transfer from point (surface) tosurface (point) is realized, so that the efficiency of the energy storage device is improved and energy loss is reduced.

Description

technical field [0001] The invention relates to the field of energy storage, in particular to a phase-change energy storage device filled with phase-change materials and having the characteristics of a fractal network structure designed to improve heat exchange performance and enhance energy storage capacity. Background technique [0002] In most energy application systems, there will be a time mismatch between energy supply and use, and energy storage can alleviate this contradiction between energy supply and demand. Common energy storage methods include sensible heat energy storage, latent heat energy storage, and chemical energy storage. Among them, latent heat energy storage has the advantages of high energy storage density, and the process of absorbing and releasing heat is carried out at isothermal conditions. Therefore, phase change energy storage technology is often used in the field of "peak shifting and valley filling" of electric power. On the one hand, it can re...

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Problems solved by technology

[0005] In order to solve the problems of low heat exchange intensity, weak storage capacity and low energy utilization rate of existing energy storage devices, the present invention provides a phase change energy storage device with fractal network structure characteristics

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