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Working fluid

A working fluid and liquid technology, applied in the field of heat transfer, can solve problems such as poor stability of heat pipes, lower capillary performance of heat pipes, capillary limit of heat pipes, etc., and achieve the effect of improving heat transfer efficiency, increasing capillary limit, and increasing thermal conductivity

Inactive Publication Date: 2010-05-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the working process of the heat pipe, the surface tension of the above-mentioned working fluid decreases continuously with the increase of its temperature, thereby reducing the capillary performance of the heat pipe, and easily making the heat pipe reach the capillary limit, resulting in poor stability of the heat pipe.

Method used

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Embodiment Construction

[0010] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0011] The present invention provides a working fluid that can be used in heat pipes, vapor chambers and other heat transfer devices. In this embodiment it is used for heat pipes, such as figure 1 As shown, the heat pipe 10 is a single-pipe heat pipe with a working fluid 20 inside it. The working fluid 20 includes a liquid 21 whose surface tension increases with increasing temperature, and a plurality of nanoparticles 22 dispersed in the liquid 21 .

[0012] The liquid 21 may be a solution containing long-chain alcohol, or only long-chain alcohol. When the liquid 21 is a solution containing long-chain alcohol, its solvent can be selected from one or a mixture of water, methanol, ethanol, propanol and acetone. The long-chain alcohol can be selected from one or a mixture of alcohols with 4 to 10 carbon atoms, which can be straight-chain alcohols or branched-...

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Abstract

This invention provides a working fluid. It includes a liquid whose surface tension is increasing with the temperature and a lot of nanoparticles dispersed in above liquid. When this working fluid uses in heat pipe, the heat conductimetry of the working liquid is improved by the homogenously dispersed nanoparticles, and capillary limit of the heat pipe is enhanced by the liquid whose surface tension is increasing with the temperature. While combining the two above, both the heat conduction efficiency and the stability of the heat pipe can be improved simultaneously.

Description

【Technical field】 [0001] The invention relates to the field of heat transfer, in particular to a working fluid for heat pipes. 【Background technique】 [0002] In recent years, the rapid development of electronic technology, the high frequency and high speed of electronic devices and the density and miniaturization of integrated circuits have caused a sharp increase in the heat generation of electronic devices per unit volume. Heat pipe technology is suitable for solving current electronic problems due to its high efficiency, compactness, flexibility and reliability. The heat dissipation problem derived from the performance improvement of the device. [0003] For the heat pipe to work normally and effectively, it is usually required that the capillary wick can evenly distribute the working fluid in the heat pipe, and can make the working fluid flow back quickly, and requires the working fluid to have a high heat of vaporization and a large thermal conductivity. The working f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/10
CPCC09K5/10
Inventor 林孟东
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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