Double-sided enhanced boiling heat transfer tube with inner spiral and outer cross tunnel

Abstract

The invention provides an inner spiral outer crossed tunnel double-side reinforced boiling heat transfer pipe, which comprises a heat transfer pipe base body, wherein an inner spiral groove is formed in the inner surface of the heat transfer pipe base body and is in spiral distribution along the inner surface, a spiral axial line is coaxial with the axial line of the heat transfer pipe, a plurality of rib sheets in spiral distribution are arranged on the outer surface of the heat pipe base body along a pipe axis and are mutually independent, and a three-dimensional expansion curve surface of the outer surface of the whole heat transfer pipe wall is formed. The inner spiral outer crossed tunnel double-side reinforced boiling heat transfer pipe has the advantages that the heat transfer area can be greatly increased, the viscous flow edge layer can also be damaged by the rib sheets, and the boiling heat transfer film coefficient can be improved; the secondary separation flow can be induced through the spiral grooves distributed in the pipe, the liquid turbulence degree in the pipe can be improved, the convection heat transfer film coefficient in the pipe can be improved, and in addition, a certain scale-resistant capability is realized. The inner spiral outer crossed tunnel double-side reinforced boiling heat transfer pipe is applicable to the heat exchange of low-viscosity liquid containing certain impurities in a reinforced pipe and high-viscosity and high-boiling-point liquid outside the pipe, particularly liquid organic compounds.

Description

technical field [0001] The invention relates to an enhanced heat transfer tube, in particular to a double-sided enhanced boiling transfer tube with an inner spiral outer cross tunnel that can greatly improve the film coefficient of boiling heat transfer outside the tube and convective heat transfer inside the tube, and has a certain anti-fouling ability. Heat pipe. Background technique [0002] Shell-and-tube heat exchangers are currently the most widely used heat exchangers. They are widely used in energy and power, petrochemical, pharmaceutical, metallurgical and other industrial fields, and their investment accounts for more than 35% of the total equipment investment. Therefore, they are used The design and improvement of shell and tube heat exchangers based on the principle of enhanced heat transfer become the key to energy saving, equipment utilization and availability. Among them, the design of efficient heat transfer tubes, the basic heat exchange elements of shell a...

AI Technical Summary

Problems solved by technology

However, they can only enhance heat transfer on one side of the outer side of the tube, and have the disadvantage of not being able to enhance the convective heat transfer coefficient in the tube, which also limits their industrial application in some aspects to a certain extent, such as low-viscosity liquid in the tube , The outside of the tube is a heat exchange place between liquids with high viscosity and high boiling point

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