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A nanofluid heat and mass transfer monitoring device and method

A nanofluid, heat and mass transfer technology, applied in measurement devices, instruments, scientific instruments, etc., to achieve rapid online monitoring, shorten inversion calculation time, and simple device use.

Active Publication Date: 2019-03-15
SHAANXI COAL & CHEM TECH INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no relevant method on how to measure the thermal conductivity increment and diffusion coefficient of nanofluids in a flowing state using an ultrasonic measuring device

Method used

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  • A nanofluid heat and mass transfer monitoring device and method
  • A nanofluid heat and mass transfer monitoring device and method
  • A nanofluid heat and mass transfer monitoring device and method

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Embodiment Construction

[0034]The invention provides a nanofluid heat and mass transfer monitoring device and method, using the sound attenuation spectrum when the ultrasonic wave propagates in the nanoparticle two-phase medium, the particle phase can be obtained by comparing the sound attenuation with the mathematical model and inversion The particle size distribution and concentration distribution can be used to monitor the influence of a large number of nanoparticle agglomeration and precipitation phenomena in the production and living practice on the mass transfer phenomenon of non-Newtonian fluids in the flowing state.

[0035] A nanofluid heat and mass transfer monitoring method, comprising the following steps:

[0036] Step 1: Adjust the position of the ultrasonic probe so that it is just aligned with the uppermost measurement point of the fluid delivery tank;

[0037] Step 2: configure the nanofluid with non-Newtonian fluid as the base liquid, and heat it to the required temperature, adjust t...

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Abstract

The invention discloses a nanofluid heat and mass transfer monitoring device and method. By recording the ultrasonic attenuation amplitude of the nanofluid with non-Newtonian fluid as the base liquid at the measurement point and the distance between the measuring probe and the reflector; repeatedly adjusting the probe and the reflector. The position of the measurement point is related to the completion of the measurement. The computer data processing system obtains the thermal conductivity increment of the nanofluid and the diffusion coefficient of the nanofluid from the acoustic frequency signal. The monitoring device includes a sample pool and an ultrasonic pulse transmitter and receiver. The fluid delivery tank of the fluid is equipped with a mirror in the fluid delivery tank. The ultrasonic straight probe is used to send ultrasonic pulses to the mirror in the fluid delivery tank and receive the reflected wave reflected by the mirror. The ultrasonic pulse transmitter and receiver is connected to the A data acquisition and processing system, the method can perform real-time high-precision monitoring of the increment of thermal conductivity and diffusion coefficient of the nanofluid in a flowing state.

Description

【Technical field】 [0001] The invention belongs to the technical field of observation of fluid heat and mass transfer phenomena, and in particular relates to a nanofluid heat and mass transfer monitoring device and method. 【Background technique】 [0002] The development of a large number of industrial and scientific research fields is inseparable from the study of the diffusion-agglomeration-sedimentation phenomena of nanoscale particles. In industry, these studies help to monitor and control the manufacturing process of products and improve product quality. These fields and industrial processes include metal powders, pharmaceuticals, food, cosmetics, pollution control, preparation of ceramics and other materials, etc.; drugs in The slow-release process in the human body can be regarded as a function of drug distribution and sedimentation; the taste and texture of many foods and beverages that can be regarded as nanofluids greatly depend on the diffusion and agglomeration of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/032
CPCG01N29/032G01N2291/015G01N2291/022
Inventor 郑化安陈曦王小宪闫渊李欣李博通李茂庆邓晓彬牛韬张文林游世海党文龙杨丹
Owner SHAANXI COAL & CHEM TECH INST
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