Nanometer magnetic particle hydrophilic and hydrophobic intelligent pipe and control system thereof

Abstract

The invention provides a nano magnetic particle hydrophilic and hydrophobic intelligent tube and a control system thereof, the inner surface of a base tube is divided into a spacer region and an intelligent surface region along the circumferential direction, the intelligent surface region is filled with nano magnetic particles, and the nano magnetic particles are controlled by magnetic induction lines penetrating through an interpolation net. The magnetic induction lines are connected with different channels of a multi-channel direct-current power source, the multi-channel direct-current power source is connected with a computer, the computer adjusts current of all the channels of the multi-channel direct-current power source, the computer receives temperature feedback of thermocouples welded to the upper end and the lower end of the outer surface of the base tube, and then the current applied to the magnetic induction lines is changed. The intensity of a magnetic field is changed by controlling the intensity of current, the contact mode of nano magnetic particles and liquid drops is changed, hydrophilic and hydrophobic reversible transformation is achieved, and the surface wettability is adjusted. In the heat exchange process of the intelligent pipe, the wettability of the inner surface of the pipe is converted according to different flow patterns, the distribution of phases in the pipe is regulated and controlled, the multiphase flow structure and heat transfer cooperation is achieved, and the heat transfer effect is improved.

Description

technical field

[0001] The invention relates to the technical field of heat exchangers, in particular to a nano-magnetic particle hydrophilic and hydrophobic intelligent tube and a control system thereof. Background technique

[0002] As an efficient energy transfer method, phase change heat transfer is widely used in industrial applications and various aspects of production and life. The enhancement of vapor-liquid phase transition has always been the key research content in the field of heat transfer. Enhancing heat transfer generally refers to increasing the heat transfer coefficient of phase change and increasing the range of heat flux density that can be used. The boiling heat transfer coefficient of the nucleate boiling zone and the increase of the critical heat flow rate, for the condensation, are to reduce the thickness of the liquid film during the thin film condensation and increase the existence time of the droplet condensation. These goals are achieved mainly by...

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