CN109269710A - A kind of pressure monitor system and method for pulsating heat pipe - Google Patents
A kind of pressure monitor system and method for pulsating heat pipe Download PDFInfo
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- CN109269710A CN109269710A CN201811287155.2A CN201811287155A CN109269710A CN 109269710 A CN109269710 A CN 109269710A CN 201811287155 A CN201811287155 A CN 201811287155A CN 109269710 A CN109269710 A CN 109269710A
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- heat pipe
- pressure
- pulsating heat
- measuring point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
Abstract
The present invention provides a kind of pressure monitor systems of pulsating heat pipe, comprising: pulsating heat pipe subsystem heats cooling subsystem and Dynamic Data Acquiring subsystem, Dynamic Data Acquiring subsystem include temperature monitoring device, pressure monitoring device and collecting computer；Temperature monitoring device is used to monitor the Temperature of Working of measuring point；Transient temperature value and pressure value of the collecting computer for real-time display and the pulsating heat pipe for saving acquisition；Pressure monitoring device includes pressure sensor and differential pressure pickup: pressure sensor, for monitoring pressure value of the pulsating heat pipe filling liquid threeway position as datum mark, differential pressure pickup, for monitoring the pressure difference of measuring point and datum mark on the pulsating heat pipe.It is inaccurate that the present invention solves the problems, such as that pressure is big when the operation of pulsating heat pipe difference operating condition, the interior each point pressure difference of pipe changes small measurement.
Description
Technical field
The present invention relates to electronic device cooling and efficient heat transfer field more particularly to a kind of pressure monitoring systems of pulsating heat pipe
System and method.
Background technique
Pulsating heat pipe is a kind of based on general heat pipe and better than the novel unique heat transfer element of one kind of general heat pipe, pulsation
The principle of heat pipe is filling part working medium after meandering capillary tube is evacuated, and since caliber is sufficiently small, working medium can be due to surface
The random branch in pipe that acts on of tension forms vent plug and the distribution of liquid plug.It is in evaporator section when operating, working medium evaporates to form vapour
Bubble, volume and pressure increase；When being in condensation segment, bubble cooling meat simultaneously ruptures, pressure decline.Due to both ends pressure difference and
Pressure imbalance between adjacent tubes, so that working medium Oscillation Flows between evaporator section and condensation segment, to realize the biography of heat
It passs.Pulsating heat pipe does not need to consume extraneous function, self shakes under thermal drivers, at low cost, small in size, structure is simple, can
Arbitrarily bending, the advantages that heat transfer coefficient is high, with the development of electronic device, miniaturization, powerful electronic device and equipment have
Wide application prospect.
The pressure measurement of pulsating heat pipe in the process of running is extremely important, while being also required to reach on pressure measurement method
Certain technical requirements.On the one hand, it is vibrated since pulsating heat pipe pressure exists, the response frequency of pressure sensor needs to be higher than arteries and veins
Dynamic heat pipe pressure oscillation frequency.During pulsating heat pipe stable operation, ripple frequency starts in 0.1~3.0Hz in pulsating heat pipe
When stage and commutation, ripple frequency is very high, but commutation phenomena often comes across heating temperature and the lower occasion of heating power.Cause
This needs the micro pressure sensor using high response frequency in the operating pressure measurement of pulsating heat pipe.On the other hand, arteries and veins
Dynamic heat pipe pressure oscillation amplitude is smaller in pulsating heat pipe evaporator section and condensation segment pressure difference, and the corresponding pressure difference of 1cm fluid column difference exists
100Pa or so, therefore, pressure sensor need resolution ratio with higher.Finally, to adapt to be caused by operating condition and liquid filled ratio change
The variation in operating pressure section, pressure sensor need to have sufficiently large range.But wide range and high-resolution are conflicts,
For example, range is 0.5 grade of high-precision pressure sensor of -0.1~1.0MPa, the resolution ratio of measurement result is only 5.5kPa.
Therefore, the pressure measurement of pulsating heat pipe is there are certain technical problem, and operation of the prior art to pulsating heat pipe
In mechanism study, there are no to the research in terms of pressure measurement.
Summary of the invention
The present invention provides a kind of pressure monitor system of pulsating heat pipe and methods, to overcome pulsating heat pipe in the prior art
The low problem of pressure measurement accuracy.
To achieve the goals above, this invention takes following technical solutions.
An aspect of of the present present invention provides a kind of pressure monitor system of pulsating heat pipe, comprising: pulsating heat pipe subsystem adds
Hot cooling subsystem and Dynamic Data Acquiring subsystem.
Dynamic Data Acquiring subsystem includes temperature monitoring device, pressure monitoring device and collecting computer；The temperature
Degree monitoring device is used to monitor the Temperature of Working of measuring point；
Transient temperature value and pressure value of the collecting computer for real-time display and the pulsating heat pipe for saving acquisition.
Pressure monitoring device includes pressure sensor and differential pressure pickup: pressure sensor, is filled for monitoring pulsating heat pipe
Pressure value of the liquid threeway position as datum mark, differential pressure pickup, for monitoring the measuring point on the pulsating heat pipe and the base
Pressure difference on schedule.
Further, pulsating heat pipe subsystem includes at least one loop type tubular type pulsating heat pipe and a filling liquid threeway portion
Position；Heating cooling subsystem includes cold source, heat source, micropump and micro flowmeter, and the cold source and heat source are respectively to wrap up
U-shaped medium pipeline and corresponding cold and thermal medium case in the loop type tubular type pulsating heat pipe two sides, the micropump
Cold medium and thermal medium are charged to the U-shaped medium pipeline respectively by the cold medium case and thermal medium case, it is described
Micro flowmeter is for adjusting cold or thermal medium flow.
Further, measuring point includes a four-way connecting elements, and the both ends of the four-way connecting elements are hot with pulsation respectively
The left and right sides at pipe measuring point is connected, and the third end of four-way connecting elements and one end of differential pressure pickup connect, the 4th end and temperature
Spend monitoring device connection；The other end of the differential pressure pickup is connected with the filling liquid threeway position of the pulsating heat pipe.
Further, pressure sensor is connected with the pulsating heat pipe filling liquid threeway position, the pressure sensor
Ball valve is installed between the pulsating heat pipe filling liquid threeway position.
Further, the measurement range of pressure sensor is -100~1000kPa, precision 5.5kPa, and response frequency is
50kHz；The measurement range of the differential pressure pickup is -1~10kPa, precision 0.01kPa, response frequency 500Hz.
Further, each U-shaped medium pipeline includes an inlet and liquid outlet, for changing thermal medium or cold medium
Into the order of different U-shaped medium pipelines.
Further, pulsating heat pipe subsystem is visualization pulsating heat pipe system, and vertical portion is quartz glass, heel
It is divided into copper pipe or stainless steel tube, the vertical portion is connected with elbow part using packing.
Another aspect provides a kind of pressure monitoring methods characterized by comprising
Pulsating heat pipe subsystem is vacuumized, checks system air-tightness；
Using syringe to charging working medium at the valve at filling liquid threeway position, and cold source and heat source are passed through according to test condition
Pulsating heat pipe is heated and is cooled down；
Read the measuring point temperature of the pulsating heat pipe by collecting computer, the pressure difference of the differential pressure pickup of measuring point and
The pressure value of the threeway position of pressure sensor as basic point；
The pressure value of each measuring point on the pulsating heat pipe is obtained based on the pressure value and each measuring point pressure difference.
Further, this method further includes using measurement range for -100~1000kPa, precision 5.5kPa, response frequency
Rate is the pressure sensor of 50kHz, monitors the pressure value at pulsating heat pipe filling liquid threeway position；Use measurement range for -1~
10kPa, precision 0.01kPa, response frequency are the differential pressure pickup of 500Hz, monitor the measuring point and base on the pulsating heat pipe
Pressure difference on schedule.
The pressure monitor system and method for pulsating heat pipe of the invention it can be seen from the method for aforementioned present invention solve
Pressure change is big when the operation of pulsating heat pipe difference operating condition, manage in each point pressure difference it is small caused by pulsating heat pipe pressure measurement accuracy it is low
The problem of, it provides convenience for research pulsating heat pipe operation mechanism.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the pressure monitor system flow chart for the pulsating heat pipe that the embodiment of the present invention 1 provides；
Fig. 2 is the pressure monitor system schematic diagram for the pulsating heat pipe that the embodiment of the present invention 1 provides；
Fig. 3 is the connection structure diagram for the four-way connecting component that the embodiment of the present invention 1 provides；
Fig. 4 is the pressure monitoring device schematic diagram for the pulsating heat pipe that the embodiment of the present invention 1 provides；
Fig. 5 is the pressure monitoring method flow chart of the embodiment of the present invention 2.
Description of symbols:
Fig. 2: 1 working medium implementation of port 2 vacuumizes 5 cold medium case of interface 3 micro flowmeter, 4 micropump, 6 thermal medium case 7
8 video camera of collecting computer, 9 temperature monitoring device, 10 pressure monitoring device
Fig. 4: A differential pressure pickup B pressure sensor C ball valve
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, further by taking specific embodiment as an example below in conjunction with attached drawing to be solved
Release explanation.
The pressure monitor system and method for pulsating heat pipe provided in an embodiment of the present invention, it is intended to solve pulsating heat pipe difference work
Pressure is big when condition is run, manages interior each point pressure difference changes the inaccurate problem of small measurement.
Embodiment 1
Fig. 1 is the pressure monitor system flow chart for the pulsating heat pipe that the embodiment of the present invention 1 provides, and Fig. 2 is that the present invention is implemented
The pressure monitor system schematic diagram for the pulsating heat pipe that example 1 provides, referring to Figures 1 and 2, which includes pulsating heat pipe subsystem,
Heat cooling subsystem and Dynamic Data Acquiring subsystem.
Dynamic Data Acquiring subsystem includes temperature monitoring device 9, pressure monitoring device 10 and collecting computer 7；It is described
Temperature monitoring device be used to monitor the Temperature of Working of measuring point.Collecting computer is for real-time display and saves the pulsation acquired heat
The transient temperature value and pressure value of pipe, and generate temperature and pressure pulsation curves.Pressure monitoring device 10 includes pressure sensor
And differential pressure pickup: pressure sensor, for monitoring pressure value of the pulsating heat pipe filling liquid threeway position as datum mark, pressure difference is passed
Sensor, for monitoring the pressure difference of measuring point and datum mark on the pulsating heat pipe.
Further, temperature monitoring device acquires the pulsating heat pipe condensation segment, evaporator section using temperature sensor respectively
And adiabatic section, pressure monitoring device acquire evaporator section and condensation segment.In order to adapt to cause operation to press by operating condition and liquid filled ratio change
The variation in power section and pulsating heat pipe pressure oscillation amplitude, pulsating heat pipe evaporator section and the lesser requirement of condensation segment pressure difference,
Pressure sensor is the pressure sensor of wide range, low resolution, for monitoring pulsating heat pipe filling liquid threeway position as benchmark
The pressure value of point, differential pressure pickup is small-range, high-resolution differential pressure pickup, for monitoring the survey on the pulsating heat pipe
The pressure difference of point and datum mark.
Preferably, pulsating heat pipe subsystem includes at least one loop type tubular type pulsating heat pipe and a filling liquid threeway position.
Preferably, heating cooling subsystem includes cold source, heat source, micropump 4 and micro flowmeter 3, the cold source and heat
Source is the U-shaped medium pipeline for being respectively wrapped in the loop type tubular type pulsating heat pipe two sides and corresponding 5 He of cold medium case
Thermal medium case 6, the micropump respectively charge the U-shaped medium pipeline by the cold medium case and thermal medium case
Cold medium and thermal medium, the micro flowmeter is for adjusting cold or thermal medium flow.
Schematically, use temperature range for 0~100 DEG C of controllable constant-temperature water bath or/and 0~300 DEG C of controllable constant
Warm oil bath is the cold medium case or thermal medium case for heating cooling subsystem, and collecting computer includes that Agilent34980A is calculated
Machine and high speed data acquisition system, the transient temperature value and pressure value and temperature and pressure of real-time display and preservation pulsating heat pipe
Pulsation curves.
Preferably, measuring point includes a four-way connecting elements, and four-way connecting elements is copper component, and Fig. 3 is that the present invention is real
The connection structure diagram of the four-way connecting component of the offer of example 1 is applied, Fig. 4 is the pressure prison for the pulsating heat pipe that the embodiment of the present invention 1 provides
Survey schematic device, referring to Fig. 3 and Fig. 4, the both ends of the four-way connecting elements respectively with the left and right two at pulsating heat pipe measuring point
Side is connected, and the third end of four-way connecting elements and one end of differential pressure pickup connect, and the 4th end is connect with temperature monitoring device；Institute
The other end for the differential pressure pickup stated is connected with the filling liquid threeway position of the pulsating heat pipe.
Preferably, pressure sensor is connected with the pulsating heat pipe filling liquid threeway position, the pressure sensor with
Ball valve is installed between the pulsating heat pipe filling liquid threeway position.Wherein, pulsating heat pipe filling liquid threeway position is as datum mark
It is due to smaller by pulsating heat pipe influence on system operation at this, closing ball valve can get more stable pressure reference, while can reduce pressure
The influence that power measurement catheter volume runs pulsating heat pipe.
Preferably, the measurement range of pressure sensor is -100~1000kPa, precision 5.5kPa, and response frequency is
50kHz；The measurement range of the differential pressure pickup is -1~10kPa, precision 0.01kPa, response frequency 500Hz.
Preferably, each U-shaped medium pipeline includes an inlet and liquid outlet, for changing thermal medium or cold medium into
Enter the order of different U-shaped medium pipelines.Heating cooling subsystem is different from previous pulsating heat pipe water tank type and cools and heats mode,
Using heating or cooling medium followed by the heat exchange mode of U-shaped medium pipeline, can by change heating water or cooling water into
The order for entering different U-shaped medium pipelines carries out correlative study.
Preferably, pulsating heat pipe subsystem is visualization pulsating heat pipe system, and vertical portion is quartz glass, elbow part
For copper pipe or stainless steel tube, the vertical portion is connected with elbow part using packing.
Further, the pressure monitor system of pulsating heat pipe further includes video camera 8, for recording visualization pipeline section gas-liquid plug
Operating condition, it is preferable that the video camera is high-speed camera.
It should be noted that it is good to need to guarantee that junction has when elbow is connect with visual quartz glass pipeline
Air-tightness.
Embodiment 2
Fig. 5 is the pressure monitoring method flow chart of the embodiment of the present invention 2, referring to Fig. 5, this method comprises:
S1 airtight test: vacuumizing pulsating heat pipe subsystem, checks system air-tightness；
S2 condition prepares: using syringe to charging working medium at the valve at filling liquid threeway position, and it is logical according to test condition
It crosses cold source and heat source pulsating heat pipe is heated and cooled down；
The monitoring of S3 temperature and pressure: the measuring point temperature of the pulsating heat pipe, the pressure difference of measuring point are read by collecting computer
The pressure value at the threeway position of the pressure difference and pressure sensor of sensor；
S4 measuring point calculation of pressure: it is obtained by the pressure value with each measuring point pressure difference each on the pulsating heat pipe
The pressure value of measuring point.
Preferably, this method further includes using measurement range for -100~1000kPa, precision 5.5kPa, response frequency
For the pressure sensor of 50kHz, the pressure value at pulsating heat pipe filling liquid threeway position is monitored, uses measurement range for -1~10kPa,
Precision is 0.01kPa, and response frequency is the differential pressure pickup of 500Hz, monitors measuring point on the pulsating heat pipe and datum mark
Pressure difference.
Preferably, when pulsating heat pipe being heated and cooled down by cold source and heat source, every grade of pulsating heat pipe is recycled,
Condensation segment and evaporator section heat transferring medium are all made of countercurrent flow.
Preferably, the air-tightness that system is checked by pressure monitoring device is changed by adjusting the angle of experiment porch
The inclination angle of pulsating heat pipe.
Wherein, working medium filling quantity is determined according to scheduled experimental program (running temperature section and working medium type).
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment or embodiment of the invention
Method described in part.
In conclusion pressure monitor system of the embodiment of the present invention by pulsating heat pipe, realizes pulsating heat pipe pressure prison
Survey method, pressure change is big when solving the operation of pulsating heat pipe difference operating condition, manages the small measuring accuracy bottom of interior each point pressure difference
Problem.This system is capable of the pressure change of precise measurement pulsating heat pipe, and measurement method safety, simple and easy, measuring accuracy is high.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, and the process in attached drawing is simultaneously
It is not necessarily necessary to the implementation present invention.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (9)
1. a kind of pressure monitor system of pulsating heat pipe, comprising: pulsating heat pipe subsystem heats cooling subsystem and dynamic data
Acquisition subsystem, which is characterized in that
The Dynamic Data Acquiring subsystem includes temperature monitoring device, pressure monitoring device and collecting computer；The temperature
Degree monitoring device is used to monitor the Temperature of Working of measuring point；
Transient temperature value and pressure value of the collecting computer for real-time display and the pulsating heat pipe for saving acquisition；
The pressure monitoring device includes pressure sensor and differential pressure pickup: pressure sensor, for monitoring pulsating heat pipe
Pressure value of the filling liquid threeway position as datum mark, differential pressure pickup, for monitor the measuring point on the pulsating heat pipe with it is described
The pressure difference of datum mark.
2. system according to claim 1, which is characterized in that the pulsating heat pipe subsystem includes at least one circuit
Type tubular type pulsating heat pipe and a filling liquid threeway position；
The heating cooling subsystem includes cold source, heat source, micropump and micro flowmeter, and the cold source and heat source are difference
It is described for the U-shaped medium pipeline and corresponding cold and thermal medium case for being wrapped in the loop type tubular type pulsating heat pipe two sides
Micropump charges cold medium and thermal medium to the U-shaped medium pipeline respectively by the cold medium case and thermal medium case,
The micro flowmeter is for adjusting cold or thermal medium flow.
3. system according to claim 1, which is characterized in that the measuring point includes a four-way connecting elements, described
The both ends of four-way connecting elements are connected with the left and right sides at pulsating heat pipe measuring point respectively, the third end of four-way connecting elements and pressure
One end of gap sensor connects, and the 4th end is connect with temperature monitoring device；The other end of the differential pressure pickup and described
The filling liquid threeway position of pulsating heat pipe is connected.
4. system according to claim 1, which is characterized in that the pressure sensor and the pulsating heat pipe filling liquid
Threeway position is connected, and is equipped with ball valve between the pressure sensor and the pulsating heat pipe filling liquid threeway position.
5. system according to claim 1, which is characterized in that the measurement range of the pressure sensor be -100~
1000kPa, precision 5.5kPa, response frequency 50kHz；The measurement range of the differential pressure pickup is -1~10kPa, essence
Degree is 0.01kPa, response frequency 500Hz.
6. system according to claim 2, which is characterized in that each of described U-shaped medium pipeline includes an inlet
And liquid outlet, the order of different U-shaped medium pipelines is entered for changing thermal medium or cold medium.
7. system according to claim 1, which is characterized in that the pulsating heat pipe subsystem is visualization pulsating heat pipe
System, vertical portion are quartz glass, and elbow part is copper pipe or stainless steel tube, and the vertical portion and elbow part use
Packing connection.
8. a kind of pressure monitoring method applied to system described in claim 1-7 any claim, which is characterized in that packet
It includes:
Pulsating heat pipe subsystem is vacuumized, checks system air-tightness；
Using syringe to charging working medium at the valve at filling liquid threeway position, and according to test condition by cold source and heat source to arteries and veins
Dynamic heat pipe is heated and is cooled down；
The measuring point temperature of the pulsating heat pipe, the pressure difference and pressure of the differential pressure pickup of measuring point are read by collecting computer
The pressure value of the threeway position of sensor as basic point；
The pressure value of each measuring point on the pulsating heat pipe is obtained based on the pressure value and each measuring point pressure difference.
9. according to the method described in claim 8, it is characterized in that, the method further include use measurement range for -100~
1000kPa, precision 5.5kPa, response frequency are the pressure sensor of 50kHz, monitor the pressure at pulsating heat pipe filling liquid threeway position
Force value；Use measurement range for -1~10kPa, precision 0.01kPa, response frequency is the differential pressure pickup of 500Hz, monitors institute
State the pressure difference of the measuring point and datum mark on pulsating heat pipe.
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| CN109945703A (en) * | 2019-02-28 | 2019-06-28 | 北京建筑大学 | Phase-change microcapsule fluid pulsation heat pipe and its system |
| WO2021031699A1 (en) * | 2019-08-20 | 2021-02-25 | 大连海事大学 | Liquid metal high-temperature pulsating heat pipe and testing method |
| CN112556918A (en) * | 2021-02-22 | 2021-03-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Differential pressure sensor and pressure measuring device |
| CN117168677A (en) * | 2023-11-02 | 2023-12-05 | 西安彬林电子科技有限公司 | Fluid pressure monitoring equipment in pipeline |
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| CN112556917B (en) * | 2021-02-22 | 2021-04-30 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for measuring pressure by using pressure measuring device |
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