Preparation method of solar energy power generation heat-preserving material such as Al-Si alloy in which percentage of Si is 12.07

A technology of solar thermal power generation and heat storage materials, applied in heat exchange materials, chemical instruments and methods, energy input, etc., can solve problems such as heat storage segregation

Inactive Publication Date: 2011-09-21
GUANGDONG UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The purpose is to improve the stability of the new aluminum-silicon alloy energy storage material, prolong the service life, solve the ser

Method used

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Embodiment Construction

[0013] a. Clean the crucible, turn on the furnace to heat up, add materials, heat up and melt.

[0014] b. After the alloy is melted, add a covering agent to cover the liquid surface to inhibit hydrogen absorption and prevent oxidation and burning.

[0015] c. Refining, when the temperature of the molten aluminum rises to 710°C, put the refining agent (baked in a resistance furnace at 150°C for 10 minutes before use, the addition temperature is above 680°C, and the addition is 0.2%-0.4% of the charge) with a bell jar Put it 30mm below the aluminum liquid surface, wait for the aluminum liquid to roll over and when no bubbles can be seen, pull up the bell jar, let it stand for a minute, and skim the scum.

[0016] d. Modification treatment, heat up to 850°C for refining, add phosphorus salt modification agent for modification treatment, wrap it with aluminum foil and press into the melt, stir evenly after the reaction, and keep warm for 10-15 minutes.

[0017] e. Grain refineme...

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Abstract

The invention relates to a preparation method of a solar energy power generation heat-preserving material such as Al-Si alloy in which percentage of Si is 12.07. The new energy-storing material, namely the aluminium-silicon alloy, is mainly applied to solar energy power generation to store heat, so that new energy is reasonably used. In the Al-Si alloy in which percentage of Si is 12.07, AlTi10 intermediate alloy and a phosphor salt serve as a composite alterant and commercial-purity aluminium of which the mass fraction is 99.9 percent and crystal silicon of which the mass fraction is 99.7 percent serve as substrates to prepare the new energy-storing material according with use of solar energy power generation. Results of metallographic analysis and differential thermal analysis show that: in the alloy subjected to composite modification of phosphor and AlTi10, the coarse block and stripe primary crystal silicon is obviously reduced, the edges and corners are passivated, and the relatively big needlelike eutectic silicon becomes particles. Composition segregation appearing when the traditional material is subjected to smelt-solidification circulation for about 1,000 times at the temperature of between 480 and 620 DEG C is improved and the utilization rate of new energy is improved.

Description

technical field [0001] The invention relates to a preparation method of an Al-12.07% Si alloy heat storage material for solar thermal power generation. The new aluminum-silicon alloy energy storage material is mainly used for storing heat in solar thermal power generation and rationally utilizing new energy. Background technique [0002] my country is rich in solar energy resources, and it is time to catch up with the world's advanced level in the field of solar thermal power generation. Now the country has included the construction of solar thermal power stations in the "Eleventh Five-Year" plan, but this is relatively weak in terms of technology and basic research in the heat storage link. In order to obtain better heat storage effects and improve the power generation efficiency of the entire system, adopt An energy storage material with high working temperature, low undercooling, good thermal stability, high heat storage density, and superior cost performance is the key. ...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C21/04C22B21/06C09K5/14
CPCY02P20/129
Inventor 张仁元李风王波群陈观生毛凌波陈枭王丹冼焯斌
Owner GUANGDONG UNIV OF TECH
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