Heat conduction PA6/water three-phase flow closed type gravity-assisted heat pipe

Abstract

The invention relates to the technical field of gravity-assisted heat pipes, and discloses a heat conduction PA6 / water three-phase flow closed type gravity-assisted heat pipe. The heat conduction PA6 / water three-phase flow closed type gravity-assisted heat pipe comprises an evaporation section, a heat insulation section and a condensation section; a mixing working medium composed of heat conduction PA6 particles and water is arranged in the evaporation section, the liquid filling rate is 30%-55% of the volume of the evaporation section, and the best liquid filling rate is 30%; the volume containing rate of the heat conduction PA6 particles in the mixing working medium is 20%-35%, the heat conduction PA6 particles are cylindrical preferably, and the equivalent diameter ranges from 1 mm to 1.5 mm; and the density is 1.9 kg / m<3>, and the heat conductivity coefficient is 10W.m<-1>.DEG C<-1>. The heat conduction PA6 / water is adopted as the working medium, the heat transfer coefficient of the evaporation section of the heat pipe is improved, the wall temperature of the evaporation section is decreased, and the entire thermal resistance of the heat pipe is reduced; and collision momentum between the heat conduction particles and the wall face is large in the heat conduction particle motion process, and the heat transferring effect and the scale preventing and removing effects are obvious.

Description

technical field [0001] The invention relates to the technical field of gravity heat pipes, in particular to a novel working medium three-phase flow closed gravity heat pipe. Background technique [0002] As a high-efficiency heat transfer element, the heat pipe is the core of heat transfer by utilizing the endothermic vaporization and exothermic condensation of the working fluid in the tube; it is widely used in waste heat recovery because of its simple structure, low manufacturing cost, and good heat transfer performance. , electronic equipment cooling, aerospace equipment thermal control and solar collectors and other fields. With the improvement of industrial production requirements, higher requirements are put forward for high-performance gravity heat pipes. How to strengthen the heat transfer of gravity heat pipes has become one of the important topics in the research field of gravity heat pipes. [0003] The three-phase flow energy-saving and anti-scaling technology h...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the technical problems of the decline in heat transfer performance and wall scaling of the gravity heat pipe during long-term use, the present invention provides a new type of heat-conducting PA6 / water three-phase flow closed gravity heat pipe, which can improve the heat transfer coefficient of the evaporation section of the heat pipe , reduce the wall temperature of the evaporation section, reduce the total thermal resistance, and effectively prevent and remove scale, thereby further optimizing the heat transfer performance of the three-phase flow closed gravity heat pipe

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