Novel efficient composite heat accumulator and preparation method thereof

Abstract

The invention relates to the technical field of heat accumulators, in particular to a novel efficient composite heat accumulator and a preparation method thereof. The novel efficient composite heat accumulator comprises a silicon carbide multiphase ceramic matrix, holes are formed in the silicon carbide multiphase ceramic matrix, part of the holes are filled with phase change materials, the two ends of the holes filled with the phase change materials are sealed through hole packaging pieces in a hot melting mode, and the phase change materials are filled with the phase change materials. And the holes which are not filled with the phase change material form heat conduction holes which penetrate through the silicon carbide-based multiphase ceramic matrix structure. According to the novel efficient composite heat accumulator, sensible heat accumulation of the silicon carbide composite ceramic matrix and latent heat accumulation of the phase-change material are organically combined, the purposes of improving the heat accumulation efficiency and optimizing the heat accumulation process are achieved, and compared with an existing sodium chloride silicon carbide heat accumulator, on one hand, the filling amount of the phase-change material can be increased; on the other hand, the manufacturing process can be simplified, the manufacturing cost can be reduced, and the manufacturing period can be shortened.

Description

technical field [0001] The invention relates to the technical field of heat storage bodies, in particular to a novel high-efficiency composite heat storage body and a preparation method thereof. Background technique [0002] Thermal energy storage is divided into sensible heat storage and latent heat storage. Sensible heat storage uses heat storage materials to store heat energy, which has the characteristics of stable performance, low cost, and good heat transfer performance, but its heat storage density is low, and the required storage The thermal device is bulky. Latent heat storage utilizes the latent heat energy released and inhaled by materials during phase change, thereby solving the time and space mismatch between energy supply and demand. Latent heat storage has the advantages of high heat storage density and compact space structure. Combining sensible heat storage and latent heat storage to maintain the advantages of both is a key topic in the research and develop...

AI Technical Summary

Problems solved by technology

[0004] 1. The amount of sodium chloride molten salt that can be compounded in the silicon carbide matrix is ​​limited, and the efficiency of latent heat storage needs to be improved;

[0005] 2. The manufacturing process of sodium chloride silicon carbide composite regenerator is complicated, and the composite time of sodium chloride molten salt and silicon carbide matrix is ​​long;

[0006] 3. The composite process of sodium chloride molten salt and silicon carbide matrix at high temperature consumes a lot of energy, resulting in high production costs

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