Nano fluid preparation device and preparation method

Abstract

The invention relates to a nano fluid preparation device and preparation method. The device comprises a steel container, an ultrasonic oscillation instrument and relative pipeline connectors; the steel container is composed of a cylindrical wall, an upper hemispherical top cover and a lower bottom cover; the ultrasonic oscillation instrument is arranged on the side surface of the steel container;the oscillation heads are encapsulated by stainless steel; and each oscillation head is provided with a trumpet-shaped transducer, and the transducers are arranged in a staggered way, so that uniformoscillation in the inner space of the device is realized. For the injection of an initially mixed nano fluid, the device is provided with an internal-thread stainless steel connector for connect a pump, so that the injection of the nano fluid is realized; for the periodic cleaning of the device, an external-thread stainless steel connector is arranged at the lowest end of the device, so that sewage discharge is realized; for the introduction of the device into various experimental systems, the device is provided with a bottom outflow connector and a middle inflow connector; and for the introduction of an air channel for controlling the pressure, the upper part of the device is provided with an air channel pipe connector. The invention provides a reliable method for preparing a nano fluid with different components by a two-step method, and the device can be accessed in various experimental systems.

Description

technical field [0001] The invention relates to the technical field of nanofluid preparation, in particular to a nanofluid preparation device and a preparation method. Background technique [0002] Nanofluids are highly expected by scholars to be used as coolants in high-power-density heat exchange systems to quickly remove heat from the system, reduce the temperature of various components, and improve the economy and safety of the system. Since it was put forward, relevant researches have been carried out on the preparation, physical properties, convective heat transfer, boiling heat transfer and CHF mechanism of nanofluids. However, in the published related research on the preparation of nanofluids or improving the stability of nanofluids, the method of adding dispersants or adjusting pH is used, and it is difficult to avoid the influence of dispersants and pH regulators on the heat transfer characteristics of nanofluids. , and even some research results believe that the ...

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Problems solved by technology

[0003] Patents CN200510037212.8 and CN200510037328.1 propose a method for preparing carbon nanotube nanofluids, but this method is only applicable to the case where the surface of nanoparticles can link positive and negative polymers, and cannot be widely applied to other types of nanofluids

[0004] Patent CN201120031974.8 proposes a nanofluid preparation control system, but this system only realizes the preparation of nanofluid under magnetic stirring, but it cannot be applied to a closed circulation system, and it is difficult to be applied in the mechanism research of nanofluid

[0005] Patent CN201210573980.5 proposes a preparation method of nanofluid with low conductivity, by dispersing the calcined nano powder into ultrapure water, but this method needs to coat the surface of the nano particles with a dispersant, and the addition of the dispersant will Affect the heat transfer properties of nanofluids with different components, especially the boiling heat transfer characteristics

[0006] Patent CN201310309154.4 proposes a nanofluid preparation method, which disperses nanoparticles into the base liquid by adjusting the pH value and ultrasound, but the nanoparticles prepared by this method are difficult to maintain stability for a long time and the introduced The pH regulator will affect its heat transfer and other characteristics, and it is impossible to conduct direct research on the effect of nanoparticles

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