High-temperature heat-storage material and uses thereof

Abstract

The invention relates to a high temperature heat accumulation material and the application, which is characterized in that: the high temperature heat accumulation material is an aluminum alloy material with a melting point arranging from 450 to 800 degree centigrade and is one material of the following six materials: 1) Al-Cu alloy with a Cu mass percent of 20% to 61% and a Al mass percent of 39% to 80%; 2) Al-Mg alloy with a Mg mass percent of 16% to 55% and a Al mass percent of 45% to 84%; 3) Al-Si alloy with a Si mass percent of 3% to 26% and a Al mass percent of 74% to 97%; 4) three component aluminum alloy with a chemical expression of Al-x% Si-y% Cu, x between 6 and 27 and y between 0 and 5; 5) three component aluminum alloy with a chemical expression of Al-x% Si-y% Mg, x between 0 and 20 and y between 0 and 40; the aluminum alloy material is used in solar power generation as a heat accumulation material. The high temperature heat accumulation material has the advantages of high phase transition latent heat, good phase transition stability and long service life.

Description

technical field [0001] The invention relates to a high-temperature heat storage material and its application. Background technique [0002] Solar power is the most ideal new energy. However, there is a problem of timeliness in utilization. The energy received during the sunshine period is more than required, but it cannot function after sunset. Therefore, how to store the excess energy during sunshine and make up for the deficiency has become a key issue to realize the continuous operation of solar thermal power generation. [0003] At present, the solar thermal power generation units operating in the world mainly use inorganic salts as heat storage materials. Inorganic salt phase change materials have the disadvantages of supercooling and phase separation during the phase change process, which affects the heat storage capacity and greatly reduces the service life. Composite phase change materials (shape-fixed phase change materials) developed in recent years, although th...

AI Technical Summary

Problems solved by technology

[0007] At present, the ternary aluminum alloys used in industry have many impurities, which have a negative effect on heat storage performance (such as phase change latent heat and other parameters) (ZL111 in the Al-Si-Cu system contains Mg, Mn, Ti and other elements; Al-Cu -There is no corresponding finished product in the Mg system; there is no corresponding finished product in the Al-Si-Mg system)

In addition, since the heat storage material undergoes repeated solid-liquid phase transitions during the working process, impurity elements will affect its performance and service life