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Cooling medium for phase change radiator

A technology for heat-dissipating working fluid and radiator, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of base liquid solidification, high fluid viscosity, limited heat-dissipation efficiency, etc., to achieve strong compatibility and large specific heat capacity Effect

Inactive Publication Date: 2014-08-13
FENGHUA JINYUAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the heat dissipation working fluid for phase change radiators is mainly water. Compared with other working fluids, water has the advantages of relatively large specific heat capacity, non-toxic and harmless, and strong compatibility. However, under high heat flux conditions (such as When LED lamps dissipate heat), the heat dissipation efficiency is limited. At the same time, under cold conditions, water is prone to volume expansion due to freezing, resulting in cracking of the phase change radiator
In order to improve the apparent specific heat of the cooling medium, organic solid-liquid phase change materials are usually dispersed in the base liquid to prepare phase change microcapsule suspensions, but the defect of phase change microcapsule suspensions is that the particle suspension volume is relatively large. Generally at the micron level, resulting in high fluid viscosity, greater resistance between particles when flowing, reducing the heat transfer effect
In order to avoid freezing of cooling fluid due to cold, a certain proportion of antifreeze is usually added to the base fluid. However, when the proportion of antifreeze is too small, the base fluid will still freeze. When the proportion of antifreeze is too large , the thermal conductivity of the base fluid decreases, which affects the cooling effect

Method used

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  • Cooling medium for phase change radiator
  • Cooling medium for phase change radiator
  • Cooling medium for phase change radiator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A heat dissipation working fluid for phase change radiators, including 7g n-octadecane, 10g sodium dodecylbenzenesulfonate, 10g butanediol, 0.2g ethanol, 0.2g n-propanol, 0.2g isopropanol Alcohol, 0.12g sodium chloride, 0.18g potassium chloride and 72.1g distilled water.

[0016] The preparation process of heat-dissipating working fluid described in the present invention is introduced in detail below:

[0017] In the first step, select 72.1g distilled water, 7g n-octadecane, 10g sodium dodecylbenzenesulfonate, 10g butanediol, 0.2g ethanol, 0.2g n-propanol, 0.2g isopropanol, 0.12g chlorine Sodium chloride, 0.18g potassium chloride;

[0018] In the second step, the ethanol, n-propanol, and isopropanol of the above-mentioned quality are successively put into the above-mentioned distilled water, and fully stirred to obtain the mixed solution A1;

[0019] In the third step, the n-octadecane of the above quality is put into the mixed solution A1, and fully stirred to obtain...

Embodiment 2

[0023] A heat dissipation working fluid for a phase change radiator, including 35g n-octadecane, 10.5g octadecyl polyoxyethylene ether, 10g ethylene glycol, 3g ethanol, 3g n-propanol, 3g isopropanol, 0.6g sodium chloride, 0.9g potassium chloride and 14g distilled water.

Embodiment 3

[0025] A cooling fluid for phase change radiators, including 17g n-octadecane, 10g octadecyl polyoxyethylene ether phosphate, 8g ethylene glycol, 3g ethanol, 3g n-propanol, 3g isopropanol , 1g sodium chloride, 1.5g potassium chloride and 53.5g deionized water.

[0026] The preparation process of Embodiment 2 and Embodiment 3 is the same as that of Embodiment 1, and will not be repeated here.

[0027] Table 1: Comparison of experimental data

[0028]

[0029] It can be seen from the above table that the heat-dissipating working medium prepared by mixing the mass fractions of the present invention has a higher specific heat capacity, better heat transfer effect, and is not easy to solidify in a low temperature environment, and the working state is relatively stable, and the technical effect is equivalent. obvious.

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Abstract

The invention discloses a cooling medium for a phase change radiator. The cooling medium comprises the following components by mass percent: 7-35% of n-octadecane, 2.5-17.5% of a surfactant, 0.5-10% of dihydric alcohol, 0.5-10% of fatty alcohol, 0.3-2.5% of inorganic salt and the balance of water, wherein water is selected from one of distilled water or deionized water. The cooling medium is large in specific heat capacity, stable in work state, small in fluid viscosity, not easy to solidify and good in heat transfer effect.

Description

technical field [0001] The invention relates to the technical field of phase-change radiators, in particular to a heat-dissipating working fluid for phase-change radiators. Background technique [0002] Phase change radiator is a relatively common heat dissipation device, which is mainly used to absorb heat from heating equipment and dissipate heat in the form of heat transfer. Phase change radiators are widely used, especially in the field of lighting. The working principle of the phase change radiator is to use the heat dissipation working fluid to take away a large amount of heat when it flows, so as to achieve the effect of cooling and heat dissipation. At present, the heat dissipation working fluid for phase change radiators is mainly water. Compared with other working fluids, water has the advantages of relatively large specific heat capacity, non-toxic and harmless, and strong compatibility. However, under high heat flux conditions (such as When LED lamps dissipate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/10C09K5/20
Inventor 金亦君黄学丰董旭军
Owner FENGHUA JINYUAN ELECTRONICS
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