Cooling medium for phase change radiator

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 ...

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

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