High-performance condensation heat exchange tube based on bionic structure

Abstract

The invention discloses a high-performance condensation heat exchange tube based on a bionic structure. The high-performance condensation heat exchange tube based on the bionic structure is used for efficiently condensing water vapor or organic steam and removing the condensed fluid in time. The condensation heat exchange tube comprises a heat exchange tube base tube (1) with a hydrophobic micro-channel structure, a super-hydrophobic base (2) arranged on the surface of the heat exchange tube base tube (1), the hydrophobic micro-channel structure (4) distributed on the super-hydrophobic base (2) and a needle-shaped hydrophilic bionic structure (3) distributed on the hydrophobic micro-channel structure (4). According to the high-performance condensation heat exchange tube, the heat exchangetube base tube is treated by the spray drying technology based on the ultrasonic atomization, so that the surface performance of the material is effectively improved, the surface energy is reduced, and more stable bead-shaped condensate is formed on the surface of the heat exchange tube; and the hydrophobic micro-channels distributed on the condensation surface can guide the liquid beads moving tothe root of the needle-shaped hydrophilic bionic structure to be away in time so that the condensation circulation can be carried out smoothly.

Description

Technical field [0001] The invention relates to a high-efficiency condensation heat exchange tube widely used in the fields of energy, electronics, refrigeration and the like, and specifically relates to a high-performance condensation heat exchange tube based on a bionic structure designed to improve condensation heat exchange efficiency. Background technique [0002] Vapor condensation heat transfer processes are widely used in energy, chemical, refrigeration and other industrial fields. Vapor condensation can generate a lot of latent heat. Therefore, the recovery of latent heat is very important for energy saving and emission reduction. In the refrigeration industry, the use of condensers with higher condensation efficiency can reduce the area of ​​the condenser and save materials. In addition, when there is a non-condensable gas in the vapor, a gas film will be formed between the liquid film or droplets and the mixed gas, which will increase the mass transfer resistance betwe...

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Problems solved by technology

However, the condensation methods achieved by the above methods are all film-like condensation, and the condensate film is attached to the tube wall to form a thermal resistance, so that the gas to be condensed cannot directly contact the tube wall, resulting in a low condensation heat transfer coefficient, which strengthens the condensation heat transfer limited room for improvement

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