Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of copper oxide drag-reduction nano fluid

A technology of nanofluid and copper oxide, applied in the direction of chemical instruments and methods, mixing methods, heat exchange equipment, etc., can solve the problems of reducing fluid transport resistance, reducing fluid heat exchange capacity, increasing fluid flow resistance, etc., to reduce Effects of pumping power, reducing flow resistance, and enhancing heat transfer efficiency

Inactive Publication Date: 2009-03-25
SHANGHAI JIAO TONG UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surfactant drag-reducing fluid greatly reduces the heat exchange capacity of the fluid while reducing the fluid transport resistance, which is one of the biggest disadvantages of the surfactant drag-reducing fluid
Nanofluids can improve the heat transfer capacity of the fluid to a certain extent, but also slightly increase the flow resistance of the fluid.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of copper oxide drag-reduction nano fluid
  • Preparation method of copper oxide drag-reduction nano fluid
  • Preparation method of copper oxide drag-reduction nano fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 2g of CTAC powder to 20kg of deionized water and let it stand for 24 hours until it is completely dissolved. Add 100 g of copper oxide nanoparticles to prepare a mixed solution.

[0018] The obtained mixed solution was placed in an ultrasonic oscillator and oscillated for 10 hours at room temperature, and the working frequency of the ultrasonic oscillator was 25 kHz. The mixed solution after shaking is collected to obtain a copper oxide drag-reducing nanofluid with a mass concentration of CTAC of 0.01% and a mass concentration of CuO of 0.5%.

Embodiment 2

[0020] Add 8g of CTAC powder to 20kg of deionized water and let it stand for 24 hours until it is completely dissolved. Then add 400g of copper oxide nanoparticles to prepare a mixed solution.

[0021] The obtained mixed solution was placed in an ultrasonic oscillator and oscillated at room temperature for 10 hours, and the working frequency of the ultrasonic oscillator was 30 kHz. Collect the mixed solution after shaking to prepare the copper oxide drag-reducing nanofluid with a mass concentration of CTAC of 0.04% and a mass concentration of CuO of 2%.

Embodiment 3

[0023] Add 6g of CTAC powder into 20kg of deionized water and let it stand for 24 hours until it is completely dissolved. Then add 800g of copper oxide nanoparticles to prepare a mixed solution.

[0024] The obtained mixed solution was put into an ultrasonic oscillator and oscillated for 10 hours at room temperature, and the working frequency of the ultrasonic oscillator was 40 kHz. Collect the mixed solution after shaking to prepare the copper oxide drag-reducing nanofluid with a mass concentration of CTAC of 0.03% and a mass concentration of CuO of 4%.

[0025] In order to illustrate the advantages of copper oxide drag-reducing nanofluid, two performance index definition formulas are given, and the larger the two performance indexes are, the better the performance is:

[0026]

[0027]

[0028] Table 1 lists the drag reduction and enhanced heat transfer properties of the copper oxide drag reduction nanofluids with different concentrations obtained in the three exa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a cupric oxide anti-drag nanometer fluid, which takes deionized water as a base fluid, and adds a surfactant Cetyltrimethyl Ammonium Chloride (CTAC) and nano-scale cupric oxide solid particles. The method comprises: adding the CTAC in fixed proportion into the deionized water, then adding a certain amount of cupric oxide nano-particles, and then placing the obtained mixed solution into an ultrasonic oscillator for oscillations for 10 to 14 hours, and finally preparing the cupric oxide anti-drag nanometer fluid. The applicable pipe diameter scope of the method is from 1 to 40cm, and the range of Reynolds number is between 4000 and 100000. The effective concentration scope of the CTAC is selected according to different operating conditions (pipe diameter and Reynolds number). The mixture ratio of the additive directly influences the flow and heat transfer performance of the cupric oxide anti-drag nanometer fluid. The cupric oxide anti-drag nanometer fluid has the feature of reducing the flow resistance of the anti-drag fluid in the transport process, and also has the characteristic of heat exchange enhancement of the nano-fluid.

Description

technical field [0001] The invention relates to a method for preparing a copper oxide drag-reducing nanofluid, belonging to the technical fields of liquid transportation and heat exchange. Background technique [0002] The urgent need for energy saving is the driving force for drag-reduction research. For a long time, in all fields involving viscous fluid motion, from internal flow to external flow, people have been looking for ways to reduce fluid resistance. The viscous drag reduction method is a technology that relies on changing the physical and mechanical properties of the boundary material or adding drag reducing additives to the flow boundary layer to change the kinematics and dynamics of the boundary layer flow, thereby achieving the purpose of drag reduction. Adding a small amount of additives (such as sand, fibers, polymers, surfactants, etc.) to the fluid can reduce the fluid flow resistance in a turbulent state. This method is called additive drag reduction. Ad...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01F3/12B01F11/02C09K5/10F28F23/00
Inventor 刘振华廖亮吕伦春陆琳
Owner SHANGHAI JIAO TONG UNIV