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A composite thermal storage body and its preparation method

A heat storage body and matrix technology, applied in heat storage equipment, lighting and heating equipment, ceramic products, etc., can solve the problems of latent heat storage efficiency to be improved, complex manufacturing process, and limited amount of sodium chloride molten salt

Active Publication Date: 2018-02-27
沧州渤海新区元大自然能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing sodium chloride silicon carbide composite regenerator has the following problems: 1. The amount of sodium chloride molten salt that can be composited in the silicon carbide matrix is ​​limited, and the latent heat storage efficiency needs to be improved; 2. The sodium chloride silicon carbide composite The production process of the regenerator is complicated, and the compounding time of sodium chloride molten salt and silicon carbide matrix is ​​long; 2. The compounding process of sodium chloride molten salt and silicon carbide matrix at high temperature consumes a lot of energy, resulting in production cost high

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  • A composite thermal storage body and its preparation method
  • A composite thermal storage body and its preparation method
  • A composite thermal storage body and its preparation method

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preparation example Construction

[0027] The preparation method of the composite heat accumulator in the present invention comprises the steps of preparing a silicon carbide multiphase ceramic matrix, preparing an encapsulation body, filling a phase change material, and the like. Among them, in the step of preparing the silicon carbide multiphase ceramic matrix, first weigh the raw materials of the silicon carbide multiphase ceramic matrix according to the following ratio: silicon carbide 78-80, kaolin 8-9, limestone 4-5, mullite 5-7 , cordierite 14-16. The above raw materials are mixed evenly, crushed to 200-300 mesh and set aside. Then configure the plasticizer solution: prepare the plasticizer solution according to the ratio of water to polyvinyl alcohol solution volume ratio of 4:1, mix the polyvinyl alcohol solution with a concentration of 3% and water, leave it for 12-24h, and wait until the two are fully After compounding, stir for 30 minutes to obtain a plasticizer solution. Then mix the pulverized s...

Embodiment 1

[0032] Preparation of silicon carbide multiphase ceramic matrix: Weigh the raw materials of silicon carbide multiphase ceramic matrix: 780g of silicon carbide, 80g of kaolin, 45g of limestone, 55g of mullite, and 150g of cordierite. The above raw materials are mixed evenly, crushed to 200 mesh and set aside. Then configure the plasticizer solution: prepare 370g of plasticizer solution according to the ratio of water to polyvinyl alcohol solution volume ratio of 4:1, add the polyvinyl alcohol solution with a concentration of 3% to the water, let it stand for 12 hours, and wait for the two to fully compound Stir for another 30 minutes to obtain a plasticizer solution. Then mix and stir the pulverized silicon carbide multiphase ceramic matrix raw material and plasticizer solution to make a green body, inject the green body into a mold, solidify at 20°C for 12 hours, and demould to obtain a green body; then After drying the green body, put it into the furnace, calcinate at 1150°C...

Embodiment 2

[0036] Preparation of silicon carbide multiphase ceramic matrix: Weigh the raw materials of silicon carbide multiphase ceramic matrix: 790g of silicon carbide, 85g of kaolin, 50g of limestone, 50g of mullite, and 140g of cordierite. The above raw materials are mixed evenly, crushed to 300 mesh and set aside. Then configure the plasticizer solution: prepare 445g of plasticizer solution according to the ratio of water to polyvinyl alcohol solution volume ratio of 4:1, add the polyvinyl alcohol solution to the water, let it stand for 18 hours, and stir for 30 minutes after the two are fully compounded. That is, a plasticizer solution is obtained. Then mix and stir the pulverized silicon carbide multiphase ceramic matrix raw material and plasticizer solution to form a green body, inject the green body into a mold, solidify at 70°C for 3 hours, and demould to obtain a green body; then After drying the green body, put it into the furnace, calcinate at 1250°C for 1 hour, keep it war...

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Abstract

The invention discloses a composite heat retainer and a preparation method. The composite heat retainer comprises a silicon carbide-based composite ceramic base body and phase-change materials. The silicon carbide-based composite ceramic base body is in a regular geometrical shape and provided with holes. The phase-change materials are charged in parts of the holes. The two ends of each hole filled with the phase-change materials are subjected to hot melting sealing through sealing bodies. The holes which are not filled with the phase-change materials are heat conducting holes which are of communication structures. The preparation method comprises the steps of silicon carbide-based composite ceramic base body preparing, sealing body preparing, phase-change material charging and the like. The composite heat retainer can enable the quantity of the phase-change materials contained by the silicon carbide-based composite ceramic base body to be easy to control; and in the heat storage process, sensible heat storage of the silicon carbide-based composite ceramic base body and latent heat storage of the phase-change materials are organically combined, so that the purposes of improving the heat storage efficiency and optimizing the heat storage process are achieved. The preparation method is capable of simplifying the manufacturing process, reducing the manufacturing cost and accelerating the manufacturing period.

Description

technical field [0001] The invention relates to an energy storage heat storage body, in particular to a composite heat storage body with low production cost and high heat storage efficiency and a preparation method. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/00F28D20/02C04B35/195C04B35/565C04B35/622C04B38/00
CPCC04B35/195C04B35/565C04B35/622C04B38/0003C04B38/0006C04B38/0051C04B2235/3208C04B2235/3463C04B2235/3481C04B2235/349C04B2235/3826F28D20/00F28D20/02F28D20/025Y02E60/14
Inventor 张远林
Owner 沧州渤海新区元大自然能源有限公司
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