CN112268837A - Visual measurement system and method for spreading characteristic of alkali metal working medium of high-temperature heat pipe - Google Patents

Visual measurement system and method for spreading characteristic of alkali metal working medium of high-temperature heat pipe Download PDF

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Publication number
CN112268837A
CN112268837A CN202011054825.3A CN202011054825A CN112268837A CN 112268837 A CN112268837 A CN 112268837A CN 202011054825 A CN202011054825 A CN 202011054825A CN 112268837 A CN112268837 A CN 112268837A
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China
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alkali metal
liquid
temperature
experiment table
storage tank
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CN202011054825.3A
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Chinese (zh)
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秋穗正
郭凯伦
王成龙
田文喜
苏光辉
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Xian Jiaotong University
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Xian Jiaotong University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0037Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
    • G01J5/004Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids by molten metals
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N11/00Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/02Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J2005/0077Imaging
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84Systems specially adapted for particular applications
    • G01N2021/8411Application to online plant, process monitoring

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)

Abstract

The invention discloses a visual measuring system and method for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe, wherein the system comprises a sealed reaction container, an alkali metal storage tank, a liquid metal dropper, a liftable experiment table, an argon bottle, a quartz glass window, a long-wave infrared germanium glass window and other components; the visual measuring system and method for the spreading characteristic of the high-temperature heat pipe alkali metal working medium can realize the observation of the dropping and spreading behavior of the high-temperature alkali metal liquid drop and the measurement of the temperature change, and can compare the influence of liquid absorption cores in different forms on the spreading characteristic of the high-temperature alkali metal liquid drop; the invention provides a general method suitable for the visual measurement of the expansion behavior of high-temperature sodium, potassium, sodium potassium and lithium metal on the surfaces of a wire mesh, a metal fiber and a foam metal type liquid absorption core.

Description

Visual measurement system and method for spreading characteristic of alkali metal working medium of high-temperature heat pipe
Technical Field
The invention relates to the technical field of heat pipes, in particular to a visual measuring system and method for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe.
Background
The high-temperature alkali metal heat pipe is an advanced passive heat exchanger based on liquid alkali metal phase change heat exchange, and has the characteristics of high isothermal property, high heat transfer efficiency, high reliability and the like. The high-temperature alkali metal heat pipe has wide application prospect in a special reactor due to excellent heat transfer characteristic, good safety and reliability and passive heat transfer characteristic. At present, the research hot tide on the high-temperature alkali metal heat pipe is gradually raised, but a series of key technologies are still not solved. The research on the flow expansion behavior of high-purity high-temperature alkali metal (> 99%) in wicks of different forms has not been developed, and the heat exchange capability of the heat pipe is seriously influenced by the flow of high-temperature liquid metal on the surface of the wick and the capillary reflux behavior inside the wick. Therefore, how to visually observe the flowing and spreading behaviors of the high-temperature alkali metal in different liquid absorbing cores and obtain the dynamic temperature change of the liquid absorbing cores in the process is achieved, so that the influence of the different liquid absorbing cores on the capillary reflux behavior of the high-temperature alkali metal working medium is determined, and the method becomes very important in the development of high-temperature heat pipes.
Disclosure of Invention
The invention aims to fill the blank and provides a visual measurement system and a visual measurement method for the spreading characteristic of the alkali metal working medium of the high-temperature heat pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
a visual measuring system for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe comprises a sealed reaction container 1 protected by argon, wherein quartz glass windows 2 are respectively arranged on the left side and the right side of the sealed reaction container 1, and long-wave infrared germanium glass windows 3 are respectively arranged on the front side and the rear side of the sealed reaction container 1; a liftable experiment table 4, an experiment table back temperature measuring point 5 and a liquid absorption core 6 paved on the upper surface of the liftable experiment table are arranged in the sealed reaction container 1; an alkali metal storage tank 7 is arranged at the upper part of the sealed reaction container 1, a heating wire 8 is wound outside the alkali metal storage tank 7, and the lower part of the alkali metal storage tank 7 is communicated with a liquid alkali metal dropper 9; the sealed reaction vessel 1 and the alkali metal storage tank 7 are respectively connected with an argon bottle 10, and the upper part of the sealed reaction vessel 1 is provided with a gas valve 11.
The liftable experiment table 4 has a heating function and controls the surface temperature of alkali metal liquid drops during dripping; simultaneously, the liftable experiment table 4 has an angle adjusting function, and the measurement of the expansion behavior of the alkali metal liquid drops on different angle planes is realized.
Wicks 6 in different forms are laid on the liftable experiment table 4, so that the observation of the expansion behavior of the alkali metal liquid drops on the surfaces of the different wicks and the measurement of the temperature change are realized.
The volume of the liquid metal droplets is regulated by controlling the amount of air taken from the argon cylinder 10 into the alkali metal reservoir 7.
According to the experimental method of the visual measuring system for the spreading characteristic of the high-temperature heat pipe alkali metal working medium, before measurement is started, the surface of an experiment table 4 can be lifted, and a liquid absorption core 6 is laid on the surface of the experiment table; opening a gas valve 11, and filling argon into the sealed reaction container 1 and the alkali metal storage tank 7 by using an argon bottle 10 to perform inert gas protection; putting the solid alkali metal working medium into an alkali metal storage tank 7, sealing the sealed reaction container 1, and closing the gas valve 11; an electric heating wire 8 is opened to heat the alkali metal storage tank 7, so that solid alkali metal is changed into liquid alkali metal; adjusting the height and the angle of the liftable experiment table 4, heating the experiment table 4, and observing the expansion behavior of the alkali metal liquid drop on different angle planes; introducing trace argon into the alkali metal storage tank 7, and allowing liquid alkali metal liquid drops to fall to the liftable experiment table 4 through a liquid alkali metal dropper 9; and (3) observing and recording the falling and expansion processes of the liquid alkali metal liquid drop along with the temperature change through a quartz glass window 2 and a long-wave infrared germanium glass window 3 by using a high-speed camera and a high-speed infrared camera respectively.
The device is used for visual observation of the expansion behavior of high-temperature sodium, potassium, sodium potassium and lithium metal on the surfaces of a wire mesh, metal fibers and a foam metal type liquid absorption core and dynamic measurement of temperature change.
Compared with the prior art, the invention has the following advantages:
1) compared with the existing liquid metal visualization device, the experimental device adopts a high-speed camera and thermal infrared imager synchronous measurement technology, and realizes visualization observation of the flow expansion process of the high-temperature alkali metal and dynamic measurement of the temperature change process.
2) The invention provides a visual measurement system and a visual measurement method for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe, which realize visual observation of the expansion behavior of different alkali metal working media such as high-temperature sodium, potassium, sodium potassium, lithium and the like on the surfaces of a wire mesh, a metal fiber and a foam metal type liquid absorption core and dynamic measurement of temperature change.
Drawings
FIG. 1 is a schematic diagram of a visual measurement system for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe.
Detailed Description
The invention is further described with reference to the following examples and figures:
as shown in figure 1, the visual measuring system for the spreading characteristic of the high-temperature heat pipe alkali metal working medium comprises a sealed reaction container 1 protected by argon, wherein quartz glass windows 2 are respectively arranged on the left side and the right side of the sealed reaction container 1, and long-wave infrared germanium glass windows 3 are respectively arranged on the front side and the rear side of the sealed reaction container 1; a liftable experiment table 4, an experiment table back temperature measuring point 5 and a liquid absorption core 6 paved on the upper surface of the liftable experiment table are arranged in the sealed reaction container 1; an alkali metal storage tank 7 is arranged at the upper part of the sealed reaction container 1, a heating wire 8 is wound outside the alkali metal storage tank 7, and the lower part of the alkali metal storage tank 7 is communicated with a liquid alkali metal dropper 9; the sealed reaction vessel 1 and the alkali metal storage tank 7 are respectively connected with an argon bottle 10, and the upper part of the sealed reaction vessel 1 is provided with a gas valve 11.
As a preferred embodiment of the present invention, the liftable laboratory table 4 has a heating function to control the surface temperature of the alkali metal droplets when they are dropped; simultaneously, the liftable experiment table 4 has an angle adjusting function, and the measurement of the expansion behavior of the alkali metal liquid drops on different angle planes is realized.
As a preferred embodiment of the invention, wicks 6 in different forms are laid on a liftable experiment table 4, so that the observation of the spreading behavior of alkali metal liquid drops on the surfaces of different wicks and the measurement of temperature change are realized.
As a preferred embodiment of the present invention, the volume of the liquid metal droplets is adjusted by controlling the amount of intake air from the argon cylinder 10 into the alkali metal reservoir 7.
According to the experimental method of the visual measuring system for the spreading characteristic of the high-temperature heat pipe alkali metal working medium, before the measurement is started, the liquid absorption core 6 is laid on the surface of the experiment table 4 in a lifting mode; opening a gas valve 11, and filling argon into the sealed reaction container 1 and the alkali metal storage tank 7 by using an argon bottle 10 to perform inert gas protection; putting the solid alkali metal working medium into an alkali metal storage tank 7, sealing the sealed reaction container 1, and closing the gas valve 11; an electric heating wire 8 is opened to heat the alkali metal storage tank 7, so that solid alkali metal is changed into liquid alkali metal; adjusting the height and the angle of the liftable experiment table 4, heating the experiment table 4, and observing the expansion behavior of the alkali metal liquid drop on different angle planes; introducing trace argon into the alkali metal storage tank 7, and allowing liquid alkali metal liquid drops to fall to the liftable experiment table 4 through a liquid alkali metal dropper 9; and (3) observing and recording the falling and expansion processes of the liquid alkali metal liquid drop along with the temperature change through a quartz glass window 2 and a long-wave infrared germanium glass window 3 by using a high-speed camera and a high-speed infrared camera respectively.
The invention can be used for the visual observation of the expansion behavior of high-temperature sodium, potassium, sodium potassium and lithium metal on the surfaces of the wire mesh, the metal fiber and the foam metal type liquid absorption core and the dynamic measurement of temperature change.

Claims (6)

1. The utility model provides a visual measurement system of high temperature heat pipe alkali metal working medium spreading characteristic which characterized in that: the device comprises a sealed reaction container (1) protected by argon, wherein quartz glass windows (2) are respectively arranged on the left side and the right side of the sealed reaction container (1), and long-wave infrared germanium glass windows (3) are respectively arranged on the front side and the rear side of the sealed reaction container; a liftable experiment table (4), an experiment table back temperature measuring point (5) and a liquid absorption core (6) laid on the upper surface of the liftable experiment table are arranged in the sealed reaction container (1); an alkali metal storage tank (7) is arranged at the upper part of the sealed reaction container (1), a heating wire (8) is wound outside the alkali metal storage tank (7), and the lower part of the alkali metal storage tank (7) is communicated with a liquid alkali metal dropper (9); the sealed reaction vessel (1) and the alkali metal storage tank (7) are respectively connected with the argon bottle (10), and the upper part of the sealed reaction vessel (1) is provided with a gas valve (11).
2. The visual measuring system for the spreading characteristic of the alkali metal working medium of the high-temperature heat pipe according to claim 1, is characterized in that: the liftable experiment table (4) has a heating function and controls the surface temperature of alkali metal liquid drops during dripping; meanwhile, the liftable experiment table (4) has an angle adjusting function, and the measurement of the expansion behavior of the alkali metal liquid drops on different angle planes is realized.
3. The visual measuring system for the spreading characteristic of the alkali metal working medium of the high-temperature heat pipe according to claim 1, is characterized in that: wicks (6) in different forms are laid on the liftable experiment table (4), so that the observation of the spreading behavior of the alkali metal liquid drops on the surfaces of the different wicks and the measurement of temperature change are realized.
4. The visual measuring system for the spreading characteristic of the alkali metal working medium of the high-temperature heat pipe according to claim 1, is characterized in that: the volume of the liquid metal liquid drop is adjusted by controlling the air input of the argon bottle (10) into the alkali metal storage tank (7).
5. An experimental method of a visual measurement system for spreading characteristics of an alkali metal working medium of a high-temperature heat pipe according to any one of claims 1 to 4, characterized in that: before the measurement is started, a liquid absorption core (6) is laid on the surface of the liftable experiment table (4); opening a gas valve (11), and filling argon into the sealed reaction container (1) and the alkali metal storage tank (7) by using an argon bottle (10) for inert gas protection; putting a solid alkali metal working medium into an alkali metal storage tank (7), sealing the sealed reaction container (1), and closing a gas valve (11); an electric heating wire (8) is opened to heat the alkali metal storage tank (7) so that solid alkali metal is changed into liquid alkali metal; the height and the angle of the liftable experiment table (4) are adjusted, the experiment table (4) is heated, and the observation of the expansion behavior of the alkali metal liquid drops on different angle planes is realized; introducing trace argon into the alkali metal storage tank (7), and allowing liquid alkali metal liquid drops to fall to the liftable experiment table (4) through the liquid alkali metal dropper (9); and (3) observing and recording the falling and expansion processes of the liquid alkali metal liquid drop along with the temperature change through a quartz glass window (2) and a long-wave infrared germanium glass window (3) by using a high-speed camera and a high-speed infrared camera respectively.
6. The experimental method according to claim 5, characterized in that: the device is used for visual observation of the expansion behavior of high-temperature sodium, potassium, sodium potassium and lithium metal on the surfaces of a wire mesh, metal fibers and a foam metal type liquid absorption core and dynamic measurement of temperature change.
CN202011054825.3A 2020-09-27 2020-09-27 Visual measurement system and method for spreading characteristic of alkali metal working medium of high-temperature heat pipe Pending CN112268837A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899783A (en) * 2021-10-19 2022-01-07 西安交通大学 High-temperature heat pipe liquid absorption core heat transfer limit experimental device and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942760A (en) * 1989-03-28 1990-07-24 Intevep, S.A. Apparatus for the measurement of interfacial tension
CN103604726A (en) * 2013-11-20 2014-02-26 中国科学院等离子体物理研究所 System for measuring wettability of high-temperature and high-chemical-activity liquid metal lithium
CN103994803A (en) * 2014-05-27 2014-08-20 厦门大学 Heat pipe liquid absorbing core capillary flow measuring method and device based on infrared image observation
CN106814009A (en) * 2015-11-30 2017-06-09 华南理工大学 The infrared thermal imaging observation device and method of a kind of carbon fibre tow wettability
CN109253947A (en) * 2018-10-19 2019-01-22 西北工业大学 High-temperature molten metal drop is rebuffed experimental provision and method under a kind of subnormal ambient
CN109470603A (en) * 2018-11-05 2019-03-15 浙江大学 The experimental system visualizing and its method of measurement & characterization contact angle under a kind of high temperature and high pressure environment
CN110411904A (en) * 2019-07-29 2019-11-05 北京交通大学 The measuring device of refrigerant working medium contact angle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942760A (en) * 1989-03-28 1990-07-24 Intevep, S.A. Apparatus for the measurement of interfacial tension
CN103604726A (en) * 2013-11-20 2014-02-26 中国科学院等离子体物理研究所 System for measuring wettability of high-temperature and high-chemical-activity liquid metal lithium
CN103994803A (en) * 2014-05-27 2014-08-20 厦门大学 Heat pipe liquid absorbing core capillary flow measuring method and device based on infrared image observation
CN106814009A (en) * 2015-11-30 2017-06-09 华南理工大学 The infrared thermal imaging observation device and method of a kind of carbon fibre tow wettability
CN109253947A (en) * 2018-10-19 2019-01-22 西北工业大学 High-temperature molten metal drop is rebuffed experimental provision and method under a kind of subnormal ambient
CN109470603A (en) * 2018-11-05 2019-03-15 浙江大学 The experimental system visualizing and its method of measurement & characterization contact angle under a kind of high temperature and high pressure environment
CN110411904A (en) * 2019-07-29 2019-11-05 北京交通大学 The measuring device of refrigerant working medium contact angle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899783A (en) * 2021-10-19 2022-01-07 西安交通大学 High-temperature heat pipe liquid absorption core heat transfer limit experimental device and method

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