Experimental facility capable of implementing visualization of condensation of inside and outside of steam tube

Abstract

The invention discloses an experimental facility capable of implementing visualization of condensation of the inside and outside of a steam tube. The experimental facility mainly comprises a steam supply system, a cooling water system, a vacuum system, a visualization experimental body and a data acquiring system. A gas supply main tube is connected with a vacuum cavity or an experimental tube section through a four-way valve, and an exhaust main tube is arranged at the rear of the cavity, and is connected with an aftercooler and a condensation tank. The aftercooler provides a cold source fromconstant-temperature water bath. A cooling water branch line enters the experimental tube section or the vacuum cavity via a flowmeter under the effect of a water pump, after heat exchange, the cooling water branch line returns to the constant-temperature water bath from a water return main tube, and the other branch line enters a tube side of the aftercooler under the effect of the water pump, and then returns to the constant-temperature water bath after heat exchange. Before an experiment, a high vacuum environment in the vacuum cavity or the experimental tube section is realized by the vacuum system. By cooperation of a front four-way valve and a rear four-way valve of the vacuum cavity, condensation of the inside of the tube or condensation of the outside of the tube can be continuously measured and analyzed and visually detected by the device under different steam pressures, different degrees of supercooling and different surface structural characteristics.

Description

technical field [0001] The invention relates to an experimental device capable of realizing condensation visualization inside and outside a steam pipe, and belongs to the field of condensation heat exchange experiments. Background technique [0002] Steam condensation is a very common phenomenon in nature and industrial applications. Among them, the most common is the condensation of pure water vapor. Condensation of water vapor is a basic form of heat transfer with the advantage of highly efficient heat release at small temperature differences. The condensation of water vapor is also an important link in energy conversion, environmental regulation, seawater desalination and thermal management systems. At present, what usually happens in the industrial process is the external condensation and internal condensation of water vapor, such as the condensation of exhaust steam in the steam turbine condenser of the power plant, the condensation of water vapor on the surface of th...

AI Technical Summary

Problems solved by technology

Among the published patents, the "Integrated Experimental Device for Evaporation and Condensation in a Single Tube" disclosed in the patent document No. 200820155479.6 can only conduct evaporation and condensation experiments in the tube, but cannot conduct condensation experiments outside the tube; the patent application number is 201220144021.7 patent document disclosed "single-tube external evaporation and condensation heat transfer performance test device" can only conduct external evaporation and condensation experiments, can not conduct in-tube condensation experiments; patent application number 201210540382. The steam condensation heat transfer experimental device for multi-component non-condensable gases" and the "condensation heat transfer experimental device that can realize the coupling of natural circulation and forced circulation" disclosed in the patent application number 201310084890.4 can only be used for condensation outside the steam pipe. The process is tested, and the condensation outside the vertical tube is carried out

Images