Experimental device capable of performing steady-state pool boiling under different saturation pressures

Abstract

The invention relates to an experimental device capable of performing steady-state pool boiling under different saturation pressures. The experimental device comprises a shell, an end cover, a heater and a temperature sensor, wherein the heater is used for heating a boiling solution, and the temperature sensor is used for detecting the temperature of the boiling solution. The experimental device is characterized in that the experimental device further comprises an inner container, a vacuum pump, a thermostatic bath, and at least one group of inlet connecting pipe and outlet connecting pipe arranged on the shell, the end cover is used for sealing the shell and the inner container, and a cavity sealed by the shell and the end cover is not communicated with an inner cavity defined by the inner container and the end cover; a cavity between the inner container and the shell is communicated with the thermostatic bath through an inlet connecting pipe and an outlet connecting pipe, and a coolant in the thermostatic bath circulates in the cavity and is used for controlling the temperature of the inner container; the boiling solution is placed in the inner container, and the vacuum pump is used for vacuumizing the inner container. The invention also provides a method for carrying out the steady-state pool boiling experiment by using the device.

Description

technical field [0001] The invention relates to an experimental device which can be used for steady-state pool boiling heat transfer under different saturation pressures. Background technique [0002] The pool boiling experimental device is widely used in phase transfer heat experiments. Immerse different kinds of objects (usually metals) in a saturated solution, and generate bubbles on the surface of the metal by electric heating, and the boiling on the metal surface is called saturated boiling. The pool boiling experimental device can change the electric heating power of the metal, observe the state of bubble generation (isolated bubble area, gas column vapor block area and film boiling area) through the observation window, and can measure the degree of superheat at the same time to obtain the pool boiling curve. [0003] Ordinary boiling devices are composed of containers with observation windows, electric heating elements and temperature measuring devices, and generally...

AI Technical Summary

Problems solved by technology

Even if the container is evacuated to meet the experimental conditions of different saturation pressures, the saturation temperature of the solution in the container will also change due to the change of the saturation pressure, and it will exchange heat with the environment, which cannot meet the conditions of the steady-state experiment.

Taking negative pressure (below one atmospheric pressure) as an example, when the pressure in the container continues to decrease, so that the saturation temperature of the solution in the container at the saturation pressure is lower than the ambient temperature, the solution in the container will continue to absorb from the environment Heat, not reaching the conditions of the steady-state experiment

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