Visualized narrow rectangular natural circulation system

Abstract

The invention discloses a visualized narrow rectangular natural circulation system and belongs to the field of thermo-technical waterpower safety. A circulation working medium in the system is water and a water flowing phenomenon can be observed and recorded through a visualized window. The specific flow is as follows: a loop of the system is used for heating the working medium water by a heating section, so that a rectangular channel is heated and boiled; then the working medium water is cooled by a condenser at the top and flows through a lower descending section; and a pre-heater arranged at the bottom is used for pre-heating to generate poor density and realize natural circulation. When the visualized narrow rectangular natural circulation system is operated, the flowing phenomenon of the visualized window can be observed. The system can be successfully manufactured after strict and accurate design and calculation. The visualized narrow rectangular natural circulation system has the beneficial effects that the heating section has a visualized quartz glass window with the length of 1000 mm so that the long-period operation under a certain pressure and a higher temperature is realized; and the system is safe and reliable and is good for total mechanical equipment configuration, engineering experiments and thermo-technical waterpower scientific researches.

Description

technical field [0001] The invention belongs to the field of thermal hydraulic safety, in particular to a visualized narrow rectangular natural circulation system. Background technique [0002] Natural circulation has important utilization value in various fields of industry. For example, in thermal power, there are natural circulation boilers; in nuclear power, natural circulation is used to export the residual heat of the reactor core in case of serious accidents to ensure the safety of the nuclear reactor; especially the third-generation advanced reactor AP1000 uses more natural circulation technology. The use of natural circulation in the military eliminates the need for traditional circulating power pumps, which can increase the concealment of submarines and enhance its strategic significance. In addition, the narrow rectangular channel can enhance heat transfer, reduce the volume of heat transfer, and make the structure compact. Therefore, the natural circulation of ...

AI Technical Summary

Problems solved by technology

The change of mass flow rate will jeopardize the safety of exporting heat to a large extent, which may eventually lead to the occurrence of CHF

[0004] Due to the difficulty of design and processing, most of the systems used to study natural circulation are fully closed and have no visualization window; or a few small openings are opened on the closed window to observe the flow phenomenon; or the length of the visualization window is far less than 1000mm

Although it is measured by other methods, it cannot be directly observed, and the conclusions are not intuitive and accurate, which will limit engineering operations and scientific experimental research

Images