All-round visual pool boiling experimental device

Abstract

The present invention provides an all-round visual pool boiling experimental device, which includes an observation container, a heating assembly and a condensation assembly, the heating assembly includes a fixed bracket and an ITO heating glass installed on the fixed bracket, and the observation container includes a container body and The observation window, the container body includes four sides and the bottom plate of the container, the bottom plate of the container is provided with ITO heating glass installation holes, the heating assembly is installed on the bottom of the container body through the installation holes of the ITO heating glass, the heating assembly is fixed outside the container bottom plate, and the four sides of the container body An opening is set, an observation window is installed at the opening position, and a condensing assembly is installed on the upper end inside the container body, and the condensing assembly includes a condensing pipe and two joints for connecting external pipelines. The invention can simulate the pool boiling in the industrial equipment, and conduct visual research on the flow and heat transfer characteristics of the fluid working medium. The device has a simple and compact structure, convenient visual observation, and a wide range of research working conditions.

Description

technical field [0001] The invention relates to a pool type boiling experimental device, in particular to an all-round visual pool type boiling experimental device. Background technique [0002] Pool boiling is common in the energy engineering industry. Pool boiling can greatly improve the heat transfer capacity of pool heating working fluid. Therefore, the cognition of pool boiling characteristics is helpful to improve the energy utilization process and improve the utilization efficiency. Many scholars at home and abroad have made a lot of research on this. The behavior of bubbles is a key factor in the study of pool boiling, while traditional experimental methods can only study macroscopically, but cannot study the microscopic behavior of bubbles. In the study of pool boiling, the process of bubbles leaving the heating surface is very important, but traditional pool boiling uses metal heating to achieve and maintain the boiling of the working fluid. This type of traditio...

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Problems solved by technology

However, judging from the currently published data, most of these visualization devices can only achieve visual observation on a specific surface, and it is difficult to achieve all-round visualization.

For example, "Bubble Formation and Movement Characteristics at Submerged Micropores" by Xie Jian et al. (Chinese Society of Engineering Thermophysics. Academic Conference Paper), used a visualized experimental device, but due to the occlusion of the heating surface, the bubble can only be observed from the side. The formation process cannot be directly observed from the bottom of the bubble

Shen Xuesong et al. "The formation of single-hole bubbles with large aperture and high gas velocity" (Journal of Chemical Industry, Vol. 59, No. 9, September 2008), also adopted the method of visual observation, but because the observation of the bottom of the bubble cannot be realized, the observation effect cannot be achieved. also subject to certain limits

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