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

An experimental device and pressure technology, applied in the field of experimental devices, can solve the problems of not being able to achieve steady-state experiments, not satisfying steady-state experiments, etc., and achieve the effects of simple equipment, low production cost, and simple principles

Pending Publication Date: 2021-08-17

TIANJIN UNIV

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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 ...

Method used

Referring to Fig. 3, device cross-sectional view of the present invention, shell 3 outsides have six takeovers, three inlets take over three outlets takeovers, can connect constant temperature tank; The ...

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.

Application Domain

Material heat development

Technology Topic

Internal cavityEngineering +3

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Examples

Experimental program(1)

Example Embodiment

[0022] See figure 1 , The overall device diagram of the present invention mainly includes a stainless steel end cap 1, a PTFE end cap 2, a housing 3, a housing viewing window cover 4, and shell quartz glass 8. The outer casing view cover 4 is covered on the outer casing quartz glass 8, which is fixed by the screw and the outer casing 3, and a gasket is provided between the outer casing quartz glass 8 and the outer casing 3 to prevent leakage.

[0023] See figure 2 The apparatus exploded in the present invention includes a liner 5, a stainless steel end cap 1, and the PTFE end cap 2 and the inner biliary 5 are commonly fixed from the screws on the outer casing 3; the stainless steel end cover 1 and the inner 5 are placed on The groove of the seal is placed in the PTFE end cover 2 and the stainless steel end cap 1, and the outer casing 3 is placed in the outer casing 3 to prevent leakage; the inner gallbladder 5 is also provided with a viewing window, the inner view window cover 6 cover On the inner galliesteglass 7, the recess is placed on the inner gallbladder 5, and the inner gallball glass 7 and the inner bile 5 are placed in the inner gallbladder 5. The end cap 1 and the PTFE end cover 2 are arranged on the same size, which can extend the thermocouple to the inner bile 5, which can be connected to the vacuum pump, which can pass the boiling solution into the inner bile 5, and can also be connected to standard sealing The connector, connect the heater to the sealing connector to control the voltage heating the boiling solution.

[0024] See image 3 The device cross-sectional view of the present invention has six receiving tubes outside the outer casing 3, and the three inlets take over three outlet pipes, which can be connected to the constant temperature slot; the coolant within the constant temperature groove is circulated between the outer casing 3 and the inner 5, ensuring the boiling of the innerness. The temperature of the solution is constant and keeps steady state boiling.

[0025] Specific experimental operation: Before the actual operation, the entire device is first secured by the screws, ensuring the airtightness of the device, and then secures the entire device on the experimental station, vacuum pump, thermocouple and standard sealing connector and stainless steel end cover 1 Connected, the thermocouple is connected by the card sleeve and the stainless steel end cap 1 and extends into the liner 5, the heater is connected to the standard sealing connector and extends into the liner 5, the other end of the standard sealing connector is connected to the regulator, by changing Heating power to perform pool boiling experiment;

[0026] To measure the boiling experiment of the steady state under different saturation pressures, first open the vacuum pump, carry out the liner 5, the liquid in the inner 5 due to vacuum, the saturation of the saturation, at this time, at this time Room temperature. If the boiler 5 is to reach the saturation state under different saturation pressures, the temperature of the temperature of the coolant in the constant temperature groove can always be corresponding to the saturation pressure by adjusting the temperature of the coolant in the constant temperature. The saturation temperature, the entire experiment has changed both saturation pressure and reaches the conditions of steady state experiment. The pool boiling experiment can then be performed in a saturated liquid.

[0027] The experimental device also provides a pressure sensor, and the pressure sensor is disposed on the pipe before the vacuum pump for measuring the pressure value in the inner gase.

[0028] The innovation point of the present invention is that the principle of saturation pressure and saturation temperature corresponds, the entire device consists of a double layer structure, and the pool is boiling experiment, and the outer casing 3 is wrapped in liner 5, by housing 3 The coolant is filled, which can ensure that the boiling solution in the innermost biliary 5 is constant, and the liquid can be changed in the case of the cooling agent in the inner case 5, and only the temperature of the coolant in the outer casing 3 can be changed. 5 boiling solution in the outer casing 3. Saturated temperature (saturation pressure), while the boiling solution in the inline 5 is not absorbed or released from the outside, and the entire experiment is carried out in steady state from the outside.

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Classification and recommendation of technical efficacy words

simple equipment
The principle is simple

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

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

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Example Embodiment

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Description & Claims & Application Information

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