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Multiscale surface with boiling enhancement function, and composite preparation method

A technology to enhance boiling and heat transfer surfaces, applied in heat exchange equipment, lighting and heating equipment, electrolytic coatings, etc., can solve the problems of stability, cost, and feasibility limitations of large-scale preparation, and achieve the improvement of critical heat flux density and strengthening The heat transfer coefficient and the effect of simple and easy preparation method

Active Publication Date: 2019-11-05
UZHOU QIANXUN NEW ENERGY TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0004] However, stability, cost, and large-scale preparation feasibility have become the main factors that limit many surface modification methods.

Method used

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  • Multiscale surface with boiling enhancement function, and composite preparation method
  • Multiscale surface with boiling enhancement function, and composite preparation method
  • Multiscale surface with boiling enhancement function, and composite preparation method

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] (1) Metal surface treatment: select a copper block with a diameter of 12mm, and polish the surface with 220 mesh, 600 mesh, 1000 mesh, 1500 mesh and 2000 mesh sandpaper in sequence. It was then ultrasonically cleaned in acetone and ethanol, respectively, and finally rinsed with deionized water and dried.

[0025] (2) Preparation of nanoparticle solution: purchase copper-zinc alloy nanoparticles with a diameter of about 100 nm, bathe in an ultrasonic water bath for 5 hours according to the ratio, and fully mix the nanoparticles with deionized water to obtain a 20 mg / mL nanoparticle solution.

[0026] (3) Preparation of nanoparticle coating: copper-zinc alloy nanoparticles are positively charged, so the treated copper surface is used as a cathode and is paired with another anode. The distance between the two electrodes is about 5 cm, and the mid...

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Abstract

The invention discloses a multiscale surface with a boiling enhancement function, and a composite preparation method. A nanoparticle coating layer is plated on the smooth surface of a metal or a metalalloy through an electrophoretic deposition method at first; and then a cellular micro-structure is generated on the surface of the nanoparticle coating layer by an electrochemical method, so that amultiscale composite structure surface is prepared. The composite structure surface integrates the advantages of two single preparation methods, on one hand, more effective nucleation sites can be provided; and on the other hand, the liquid supplementing capacity of the surface can be remarkably improved. Therefore, the composite structure surface is capable of enhancing boiling heat exchange performance which comprises a heat transfer coefficient and a critical heat flux density. The enhancement effect is also obvious for ultra-wetting fluids such as FC-72, HFE-7200 and NOVEC-649. Meanwhile,the preparation method is mature, simple and practicable, and low in cost, and provides possibility for large-scale and industrialized application for the preparation method.

Description

technical field [0001] The invention belongs to the technical field of heat exchange enhancement and energy saving, and in particular relates to an enhanced boiling heat exchange surface applied in the fields of energy and power, petrochemical industry, cooling of electronic devices and the like. Background technique [0002] Boiling heat transfer widely exists in a variety of industrial equipment and industrial processes, such as coal-fired and solar power plants, cooling of high-power electronic equipment, etc. Enhanced boiling heat transfer can improve equipment efficiency, reduce energy consumption, and ensure safe operation. In terms of boiling heat transfer, heat transfer coefficient and critical heat flux are two key parameters. The heat transfer coefficient determines the heat transfer efficiency, and the critical heat flux determines the heat transfer safety limit. If the heat flux exceeds the critical value, the temperature of the equipment will rise suddenly, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D15/02F28F21/08
CPCC25D15/02F28F21/08
Inventor 吴赞曹桢杨涛
Owner UZHOU QIANXUN NEW ENERGY TECH CO LTD
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