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High-temperature heat transfer medium and preparation method thereof

A heat transfer working fluid, high temperature technology, applied in chemical instruments and methods, heat exchange materials, energy input, etc., can solve problems such as casualties and large economic losses, achieve low steam pressure, simple preparation methods, and meet the needs of transmission Effects of thermal and/or performance requirements

Inactive Publication Date: 2015-03-04
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Once the heat pipe leaks during the working process, it will cause large economic losses, and may even cause casualties

Method used

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  • High-temperature heat transfer medium and preparation method thereof
  • High-temperature heat transfer medium and preparation method thereof
  • High-temperature heat transfer medium and preparation method thereof

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] As a specific example, firstly, each component (industrial grade) of the high-temperature heat transfer fluid is uniformly mixed according to the following weight ratio: NaBr: 5 parts; Ca(Br) 2 : 18 parts; KBr: 27 parts; LiBr: 50 parts, mixed with 50 grams of mixture, put it into a beaker and carry out preliminary stirring and mixing with a glass rod; Turn on the power of the pulverizer and turn it for 15-20s, so that the four compounds are basically fully and uniformly mixed; then put the uniformly mixed mixture into an electric furnace with a stirrer and gradually heat it to 305°C while stirring until the mixture melts ; Then while continuing to heat and stir, gradually heat the mixture to and stabilize to 500°C, and then continue to stir for 45 minutes. After the crystallization and other impurities in the ...

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Abstract

The invention provides a high-temperature heat transfer medium and a preparation method thereof. The high-temperature heat transfer medium is prepared by uniformly mixing the following components in parts by weight: 3-25 parts of NaBr, 4-25 parts of Ca(Br)2, 25-67 parts of KBr and 16-50 parts of LiBr. The high-temperature heat transfer medium provided by the invention is high in heat transfer coefficient, low in steam pressure and good in heat stability and safety performance at high temperature; and the high-temperature heat transfer medium does not easily generate chemical reaction with metal materials such as stainless steel within the using temperature range, and the condition that non-combustion or explosion and other violent accidents happen because of chemical reaction between the high-temperature heat transfer medium and most of fluid does not easily happen too, so that the requirement of solar heat power generation for heat transfer or the requirement of the medium and a high-temperature heat pipe for the performance of the heat transfer medium can be met.

Description

technical field [0001] The invention relates to the technical field of physical heat transfer working fluid in high-tech thermal energy materials, in particular to a high-temperature heat transfer working fluid and a preparation method thereof. Background technique [0002] Concentrating solar thermal power generation is a large-scale and commercially viable power generation model, in which heat transfer and heat storage technology is one of the core technologies that affect its power generation scale and efficiency, and how to choose a suitable high-temperature heat transfer medium is a One of the most important key links in heat transfer technology. [0003] Molten salt is a melt of inorganic salts. Because of its obvious advantages including wide application range, low viscosity, large thermal conductivity, large heat capacity and good chemical stability, it has been widely used in concentrated solar thermal power generation systems in recent years. Such as the United St...

Claims

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Application Information

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IPC IPC(8): C09K5/12
CPCC09K5/12Y02P20/129
Inventor 熊亚选史建峰刘蓉陈红兵李德英
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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