Low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic and preparation method thereof

A solar thermal power generation, low-cost technology, applied in solar thermal power generation, solar thermal storage, solar thermal energy and other directions, can solve the problems of phase change material leakage, strong corrosion and low thermal conductivity of heat storage tanks, and improve thermal conductivity. performance, improve thermal shock resistance, and improve the effect of heat storage

Active Publication Date: 2018-04-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both molten salt and alloy heat storage materials are highly corrosive, which will affect the safe and long-term operation of the entire heat storage system, and the thermal conductivity of molten salt heat storage materials is poor, and alloy heat storage materials are expensive
[0005] It can be seen that a single sensible heat or latent heat storage method cannot guarantee efficient and stable heat storage, and most

Method used

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  • Low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic and preparation method thereof
  • Low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic and preparation method thereof

Examples

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Embodiment 1

[0033] A low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramics (see attached figure 1 ), the preparation steps are as follows:

[0034] 1) Raw material treatment: ball mill the coal-series kaolin and aluminum powder for 1 hour respectively, and pass through a 250-mesh sieve.

[0035] 2) Raw material ratio: the mass percentage of each raw material is: 65% of coal series kaolin and 35% of aluminum powder.

[0036] 3) Mixing of raw materials: Coal-based kaolin and aluminum powder are mixed in a kneader for 2 hours to obtain a mixture; add binder, lubricant and water to the mixture and mix for 20 minutes, then use a vacuum mud mixer to refine the mud and age it for 24 hours. Get stale good mud.

[0037] The binding agent is a mixture of carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 1:1, and the addition is 3% of the weight of the mixture; the lubricant is tung oil, and the addition is 4% of the weight of the mixture;...

Embodiment 2

[0048] A low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic, the preparation steps are as follows:

[0049] 1) Raw material treatment: ball mill the coal series kaolin and aluminum powder for 2 hours respectively, and pass through a 325-mesh sieve.

[0050] 2) Raw material ratio: the mass percentage of each raw material is: 70% of coal series kaolin and 30% of aluminum powder.

[0051] 3) Mixing of raw materials: Coal-based kaolin and aluminum powder are mixed in a kneader for 2 hours to obtain a mixture; binder, lubricant and water are added to the mixture and mixed for 30 minutes, and then the mud is refined with a vacuum mud mixer and aged for 30 hours. Get stale good mud.

[0052] The binding agent is a mixture of polyvinyl alcohol and water glass in a mass ratio of 1:1, and the add-on is 5% of the weight of the mix; the lubricant is soybean oil, and the add-on is 5% of the weight of the mix; the add-on of water is 20% by wei...

Embodiment 3

[0061] A low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic, the preparation steps are as follows:

[0062] 1) Raw material treatment: ball mill coal series kaolin and aluminum powder for 2 hours respectively, and pass through a 250-mesh sieve.

[0063] 2) Raw material ratio: the mass percentage of each raw material is: 68% of coal series kaolin and 32% of aluminum powder.

[0064] 3) Mixing of raw materials: Mix coal-based kaolin and aluminum powder in a kneader for 1 hour to obtain a mixture; add binder, lubricant and water to the mixture and mix for 20 minutes. Get stale good mud.

[0065] The binding agent is polyvinyl alcohol, and the addition is 5% of the mixture weight; the lubricant is a mixture of tung oil and soybean oil in a mass ratio of 1:1, and the addition is 4% of the mixture weight; the addition of water is 22% by weight of the mix.

[0066] 4) Honeycomb body molding: Extrude the stale mud material through an ex...

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Abstract

The invention relates to low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic and a preparation method thereof. The low-cost solar thermal power generationsensible heat-latent heat composite heat storage ceramic is obtained by means of the method that latent heat alloy powder is packaged in a sensible heat ceramic base body of a honeycomb structure. Thesensible heat ceramic base body comprises the raw materials of, by mass, 65-70% of coal series kaolinite and 30-35% of aluminum powder. According to the low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic provided by the invention, the heat storage density is larger than or equal to 1500kJ/kg (room temperature-1000 DEG C), cracking is avoided when heatcycle is conducted 1000 times at 1000 DEG C-room temperature, alloy leakage is avoided, the chemical reaction between an alloy and the ceramic base body is avoided, and the property requirements forsolar thermal power generation heat storage materials are met.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to a low-cost solar thermal power generation sensible heat-latent heat composite heat storage ceramic and a preparation method thereof. Background technique [0002] Solar thermal power generation is a technology that first converts solar energy into high-grade thermal energy by concentrating light, and then realizes electricity production through a Stirling generator. The solar thermal power generation system includes a concentrated heat collection system, a heat storage system, a power generation system, and a control system. The heat storage system stores heat and releases heat smoothly for power generation in the absence of sunlight, thereby effectively Solve the problem of power output fluctuations caused by the intermittent nature of sunlight. Since the heat storage system needs to work at a high temperature of 200-900°C for a long time, it is require...

Claims

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Application Information

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IPC IPC(8): F24S60/00C04B33/04C04B33/13C03C8/24
CPCC03C8/24C04B33/04C04B33/13C04B2235/402C04B2235/6021C04B2235/606Y02E10/40
Inventor 吴建锋张亚祥徐晓虹劳新斌
Owner WUHAN UNIV OF TECH
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