Heat storage material filling method capable of improving sensible heat storage density of solid and heat storage device

Abstract

The invention discloses a heat storage material filling method capable of improving the sensible heat storage density of a solid and a heat storage device. The heat storage material filling method comprises the following steps that a small-particle solid heat storage material is laid at the bottom of a housing; a medium-particle solid heat storage material is laid on the small-particle solid heatstorage material; a large-particle solid heat storage material is laid on the medium-particle solid heat storage material; the medium-particle solid heat storage material is laid on the large-particlesolid heat storage material, and the small-particle solid heat storage material is laid on the medium-particle solid heat storage material; and the small-particle solid heat storage material is laidcontinuously, the medium-particle solid heat storage material is laid on the small-particle solid heat storage material, and the large-particle solid heat storage material is laid on the medium-particle solid heat storage material. The solid heat storage material is divided according to the particle size of the solid heat storage material to perform layered filling, and does not need being subjected to press-fit, the void ratio of the solid heat storage material can be reduced to the maximum extent, the solid sensible heat storage density is improved, and the heat storage efficiency is furtherimproved.

Description

technical field [0001] The invention relates to a heat storage material filling method for increasing solid sensible heat storage density, and also relates to a heat storage device using the heat storage material filling method. Background technique [0002] Sensible heat storage is the heat absorbed or released when the temperature of the substance rises or falls, while the nature of the substance itself does not change. Sensible heat storage materials are divided into liquid and solid. Commonly used high-temperature solid sensible heat storage materials are gravel, sand, brick, ceramics, glass, iron, aluminum, concrete, ore, and magnesia bricks. [0003] For high temperature solid sensible substances, the heat transfer medium or the medium used to absorb thermal energy or absorb heat from an external source is a fluid substance. The heat transfer fluid can be water, air, any hydrocarbon fluid (such as thermal oil), molten salts (such as sodium nitrate, potassium nitrate, ...

AI Technical Summary

Problems solved by technology

The heat storage device has the following defects: (1) In order to realize the heat exchange of the heat storage body, a heat storage air channel is provided in the heat storage body, so a specially designed reserved channel is required on the heat storage body, which increases the complexity of the forming process of the heat storage body , but also increases the production cost

In the preparation process, firstly, each component needs to be crushed into granules, which increases the difficulty of the preparation process of magnesia-iron bricks, and the production cost is also high. At the same time, channels need to be reserved to realize air heat exchange. However, the purpose of bonding is to remove the gaps, and the air ducts are set to increase the gaps. This is not conducive to improving the solid sensible heat storage density, and thus cannot improve the heat storage efficiency.

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