A low-melting-point nano-molten salt heat transfer heat storage medium and its preparation method

A technology of heat storage medium and low melting point, which is applied in the field of physical heat transfer and energy storage in high and new technology, can solve the problems of high melting point, low thermal conductivity and high melting point of molten salt, achieve cost reduction, good heat transfer and heat storage capacity, The effect of specific heat improvement
CN105222477BActive Publication Date: 2017-11-21河北井矿新能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
河北井矿新能源科技有限公司
Publication Date
2017-11-21

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Abstract

The invention discloses a low-melting-point nano molten salt heat transfer and storage medium and a preparation method and belongs to the technical field of physical heat transfer and energy storage in advanced technologies. The low-melting-point nano molten salt heat transfer and storage medium is prepared from low-melting-point mixed molten salt and nanoparticles in a composite mode. The low-melting-point mixed molten salt is mainly composed of potassium nitrate, sodium nitrate, calcium nitrate and lithium nitrate. The nanoparticles are nanoparticles of metallic oxide or nonmetallic oxide. According to the novel low-melting-point nano molten salt prepared through the method, the melting point is 80-130 DEG C, the decomposition temperature is approximately 600 DEG C, and compared with the low-melting-point mixed molten salt, the using temperature range of the low-melting-point nano molten salt does not change greatly, but the specific heat is improved remarkably by about 10-60%.
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Description

technical field

[0001] The invention relates to a formula of mixed molten salt for medium and high temperature heat transfer and heat storage, belonging to the technical field of physical heat transfer and energy storage in high and new technology. Background technique

[0002] Because solar thermal power generation can be combined with low-cost and large-scale heat storage technology, it can provide stable high-quality electric energy, overcome the defects of poor power transmission quality and large impact on the power grid caused by the inability of large-scale use of batteries in wind and photovoltaic power plants. It is considered to be one of the most promising power generation methods in renewable energy power generation, and may become the main energy source in the future.

[0003] At present, in the field of mature trough solar thermal power generation, commercial power stations use heat transfer oil as heat transfer medium, which leads to high cost of large-scale i...

Claims

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