Cross oval section and round face heat exchange enhanced pipe

Abstract

The invention discloses a cross oval section and round face heat exchange enhanced pipe. The cross oval section and round face heat exchange enhanced pipe comprises round pipe sections. The round pipe sections are connected with oval pipe sections through oval transition sections. The round pipe sections are equal in length. The oval pipe sections are equal in length. The cross angle of section oval long axes of the two adjacent oval pipe sections is 60-90 degrees. The cross sections of the oval transition pipe sections are in the shape of a standard oval or the shape similar to the oval or the shape of the flat round formed by two straight lines and two circular arcs or the shape of the symmetric and similarly-symmetric flat round or circle formed through fitting of multiple sections of arcs. The oval transition pipe sections are equal in length. The two ends of the cross oval section and round face heat exchange enhanced pipe are provided with round pipe connector sections. The inner walls of the round pipe connector sections are smooth. The round pipe connector sections and the round pipe sections are equal in inner diameter. The cross oval section and round face heat exchange enhanced pipe is simple in structure, the balance of a speed field and a temperature gradient field is effectively and reasonably coordinated, energy saving and environment friendliness are achieved, and efficiency is high.

Description

technical field [0001] The invention relates to a heat transfer device, in particular to a pipe-type heat exchange device. Background technique [0002] Heat transfer enhancement technology has been widely used in daily life because it can increase the heat transfer rate and achieve the purpose of saving energy. Heat transfer enhancement technology is mainly divided into active enhancement technology and passive enhancement technology. The former refers to the heat transfer enhancement technology that requires energy input from the outside, such as electric field enhancement, magnetic field enhancement, vibration enhancement technology, etc.; the latter refers to the heat transfer enhancement technology that does not require external energy, so it is easier to be applied to engineering. Passive enhancement techniques typically include extended surfaces (fins), in-tube inserts, swirl (turbulence) generators, etc. Passive enhancement technology has been widely used, but ther...

AI Technical Summary

Problems solved by technology

Passive enhancement technology has been widely used, but there is still a common problem, that is, while the heat transfer is enhanced, the flow resistance increases more, which is not conducive to energy saving, thus hindering the wider application of these technologies in various engineering fields

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