A heat transfer structure for enhanced boiling

Abstract

The invention discloses a heat exchanging structure for strengthening boiling. The heat exchanging structure is of a circle-shaped spiral linear structure formed by heat exchanging surfaces; the heatexchanging surfaces comprise bottom edges and top edges; the projection of the top edges of the inner circles in every two adjacent circles of heat exchanging surfaces on the planes of the bottom edges coincides with the bottom edges of the outer circles in the two adjacent circles of heat exchanging surfaces; the heat exchanging surfaces are constituted by hydrophilic areas and hydrophobic areas,wherein the hydrophilic areas and the hydrophobic areas are formed at intervals; every two adjacent circles of heat exchanging surfaces are distributed at equal distances; the last heat exchanging surface in the former circle is connected with the first heat exchanging surface in the latter circle to form the spiral linear structure; and machined grooves are formed between the heat exchanging surfaces. The heat exchanging surfaces of the heat exchanging structure have efficient heat exchanging performance, the number of vaporization cores is greatly increased through orderly-arranged columnarmicrostructures, it is guaranteed that bubbles can be disengaged from the heat exchanging surfaces in time from the smooth hydrophilic areas, timely replenishment of liquid is guaranteed, and thus the purposes of lowering the wall face overheat degree and delaying the dry burning crisis are achieved.

Description

technical field [0001] The invention relates to a heat exchange surface structure for enhancing boiling, in particular to a heat exchange surface structure which combines a helical structure and a hydrophilic and hydrophobic surface and can effectively enhance the heat exchange effect of boiling. Background technique [0002] Boiling phenomena widely exist in modern industrial production and life. How to enhance boiling heat transfer has always been a hot topic in the field of boiling research. Enhancing boiling heat transfer can not only improve the efficiency of heat transfer and save energy, but also It can effectively reduce the safety risk of equipment, so it has wide application value and research prospect. [0003] At present, the effect of boiling phase change heat transfer is largely related to the physical and chemical properties of the heat transfer surface, such as wettability, roughness, and effective heat transfer area. Micromachining can significantly change t...

AI Technical Summary

Problems solved by technology

However, the effective heat transfer area of ​​the heat transfer surface prepared by traditional methods (such as the use of physical, chemical or mechanical methods to create a porous structure on the heat transfer surface and the use of threaded surface structure) is relatively small, the number of vaporization cores is small, and the generation The frequency of bubbles is low, and the heat transfer efficiency of boiling is low

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