Multi-phase-change material sub-cavity casing pipe type phase change heat accumulator

Abstract

The invention discloses a multi-phase-change material sub-cavity casing pipe type phase change heat accumulator. The multi-phase-change material sub-cavity casing pipe type phase change heat accumulator comprises a middle round tube, multiple sub-cavity wall faces, a heat exchange tube and multiple rib pieces, wherein the middle round tube is arranged outside a target heat accumulation object in asleeving manner; the multiple sub-cavity wall faces are arranged at the outer side of the middle round tube; the heat exchange tube is arranged at the outer sides of the sub-cavity wall faces in a sleeving manner; and the multiple rib pieces vertically penetrate the sub-cavity wall faces and the heat exchange tube, so that multiple sub-cavities are formed and used for containing different heat accumulation materials, wherein the number of the sub-cavity wall faces is greater than or equal to one, and the number of the rib pieces is greater than or equal to one. By means of the rib pieces adopted in the multi-phase-change material sub-cavity casing pipe type phase change heat accumulator, heat of hot fluid can be transmitted to the lower portion of the heat accumulator, so that heat accumulation efficiency is improved; in addition, the melting point of the PCM in the lower cavity is lower, and the PCM can be molten more easily within the same time, so that integral heat accumulation performance is remarkably improved; the PCM melting rate can be increased while the heat exchange area is increased; and the adopted PCM can absorb and release heat to achieve energy storage and release, therefore, supply and demand synchronization is achieved, and energy waste can be effectively avoided.

Description

technical field [0001] The invention relates to a heat accumulator, in particular to a multi-phase-change material cavity casing type phase-change heat accumulator. Background technique [0002] Heat storage technology is a technology that effectively solves the mismatch between heat energy demand and supply in terms of time and intensity. Phase change materials (PCM) absorb and release heat when a phase change occurs to realize energy storage and release, thereby realizing the synchronization of supply and demand. Energy waste can be effectively avoided. Due to the natural convection effect of ordinary heat accumulators when storing heat, the upper and lower melting is not synchronized, the temperature of the upper part and the temperature of the lower part are not uniform, etc., which leads to problems such as long heat storage time. However, the number of ribs is large, the construction is complicated, the equipment is expensive, and the market penetration rate is still ...

AI Technical Summary

Problems solved by technology

[0004] Solar energy is clean, pollution-free, and easy to use. However, due to the low energy density of solar energy reaching the earth's surface and the influence of regular changes in geography, day and night, and seasons, its radiation intensity has significant thinness, discontinuity, and instability. , in order to keep the heating and power supply devices running stably and uninterruptedly, the heat storage device is needed to store the solar energy and release it when the energy is insufficient.

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