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Preparation of heat conducting oil with nano-particle for strengthening heat transfer and use thereof in electric oil-filled radiator

A technology of nano-particles and enhanced heat transfer, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problem of low thermal conductivity of heat transfer oil, achieve the effect of improving thermal conductivity, reducing power consumption, and reducing volume

Inactive Publication Date: 2009-05-27
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defect of low thermal conductivity of the existing heat transfer oil and provide a preparation method for improving the thermal conductivity of heat transfer oil by using nano-particle enhanced heat transfer process; another purpose of the present invention is to provide a Application of heat transfer oil in electric heating oil

Method used

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  • Preparation of heat conducting oil with nano-particle for strengthening heat transfer and use thereof in electric oil-filled radiator
  • Preparation of heat conducting oil with nano-particle for strengthening heat transfer and use thereof in electric oil-filled radiator
  • Preparation of heat conducting oil with nano-particle for strengthening heat transfer and use thereof in electric oil-filled radiator

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Experimental program
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preparation example Construction

[0032] The preparation of heat-conducting oil using nanoparticles to enhance heat transfer takes the heating pot as the main equipment, and the process flow is as follows figure 1 Shown:

[0033] (1) Preparation of nanoparticles:

[0034] Liquid-phase methods such as chemical precipitation or hydrothermal synthesis or sol-gel methods, or solid-phase methods such as crushing methods, solid-phase chemical methods, or gas-phase methods such as evaporation condensation or sputtering methods, or chemical Nanoparticles can be prepared by any method in the vapor deposition method.

[0035] (2) Cleaning of nanoparticles:

[0036] The prepared nanoparticles were washed with deionized water to remove possible impurities on the surface.

[0037] (3) Dispersion of nanoparticles:

[0038] Disperse the cleaned nanoparticles in deionized water, and use mechanical stirring or ultrasonic dispersion to promote their uniform dispersion.

[0039] (4) Coating modification of nanoparticles:

...

Embodiment

[0047] (1) Preparation of nanoparticles: Nano-Fe3O4 particles were prepared by chemical precipitation.

[0048] (2) Cleaning of nanoparticles: the prepared nano-Fe3O4 particles were cleaned with deionized water to remove impurities that may exist on the surface. figure 2 is the XRD spectrum line of nano-Fe3O4 particles, image 3 It is the SEM photo of nano-Fe3O4 particles.

[0049] (3) Dispersion of nanoparticles: disperse the cleaned nano Fe3O4 particles in deionized water, and adopt mechanical stirring method to promote their uniform dispersion.

[0050] (4) Coating modification of nanoparticles: at 60-70°C, slowly add modifier Span 85 according to 20% by weight of nanoparticles during constant stirring, and then naturally cool after coating and modification for 2 hours. Figure 4It is the SEM photo of coated nano-Fe3O4 particles after modification.

[0051] (5) Dispersion of nano-particles in heat-conducting oil: 0.5-1% by weight of coated and modified nanoparticles is ...

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Abstract

The invention discloses a method for preparing conduction oil with strengthened heat transfer by adopting nano-particles and application of the method to electrical heating oil lights. The preparation method comprises the steps of the preparation of the nano-particles, the washing of the nano-particles, the dispersion of the nano-particles, coating modification of the nano-particles, the dispersion of the nano-particles in conduction oil, moisture removal by heating, and the filling and storage of nanometer conduction oil, the prepared conduction oil is dispersed with the nano-particles, and the nano-particles are subjected to surface coating modification through an oleophilicsurfactant to accelerate the nano-particles to be dispersedly suspended in the conduction oil. The thermal coefficient of the conduction oil is remarkably improved, the conduction oil still has steady suspension after two years of storage and is uniform and steady novel heat transfer medium with high thermal coefficient, the density of the conduction oil reaches between 0.85 and 1.0g / cm<3>, the open flash point is more than or equal to 180 DEG C; the conduction oil can improve the rate of temperature increase, reduce the electrified heating and temperature increase time of the oil lights, and play roles in power conservation and material conservation when applied to the electrical heating oil lights; and practice proves that the temperature increase rates of the electrical heating oil lights with the application of the conduction oil are improved by more than 15 percent than those of common oil lights.

Description

technical field [0001] The invention relates to a method for preparing heat-conducting heat-conducting oil enhanced by using nanoparticles and the application of the nano-heat-conducting oil in electric heating oil. Background technique [0002] A currently known effective way to increase the thermal conductivity of a liquid is to add solid particles of metal, non-metal or polymer to the liquid. This is because the thermal conductivity of solid particles is several orders of magnitude larger than that of liquid. As shown in Table 1.1, the thermal conductivity of copper at room temperature is 700 times that of water and 3000 times that of engine oil. Therefore, the thermal conductivity of a two-phase liquid with solid particles suspended Much larger than pure liquid. Many scholars have carried out a lot of theoretical and experimental research, but the initial research is limited to the use of millimeter or micron-sized solid particles suspended in the liquid. Although the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/00
Inventor 周宇松吴敏逯庆国郭红燕谭锁奎
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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