CN202403998U - Plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device - Google Patents
Plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device Download PDFInfo
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- CN202403998U CN202403998U CN2011205446684U CN201120544668U CN202403998U CN 202403998 U CN202403998 U CN 202403998U CN 2011205446684 U CN2011205446684 U CN 2011205446684U CN 201120544668 U CN201120544668 U CN 201120544668U CN 202403998 U CN202403998 U CN 202403998U
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Abstract
The utility model relates to plate-fin heat exchanger technology and aims at providing a plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device. The device comprises all leading-out flow channels distributed in evenly divided areas of plate-fin heat exchanger outlets, and a gas-liquid separator and a flow measurement device are both arranged on each leading-out flow channel. The testing device adopts a gas-liquid two-phase separating and measurement system based on a multi-element parallel-testing structure and separates and measures gas-liquid two-phase flow of all outlets of the plate-fin heat exchanger simultaneously. Flow regime change of fluid in a pipe caused by unequal pressure drop is avoided, and simultaneously fluctuation of the fluid in the pipe caused by switching of valves is eliminated, therefore the plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device has the advantages of being high in detecting precision, simple in structure, convenient to operate, high in real-time property and the like.
Description
Technical field
The utility model relates to a kind of plate type finned heat exchanger biphase gas and liquid flow distribution character proving installation, belongs to the plate type finned heat exchanger gas-liquid two-phase and mixes and the distribution technique field.
Background technology
Plate type finned heat exchanger is one type to be made up of annexes such as plate bundle, end socket, adapter and bearings, and with the high-performance heat exchanger of fin as its heat transfer element.Wherein, the plate bundle is superposeed at interval and is formed by two or more a layer channel unit, and every layer of passage is made up of fin, dividing plate and strip of paper used for sealing etc.Such heat interchanger has characteristics such as heat transfer efficiency height, compact conformation and adaptability are good, is widely used in fields such as petrochemical industry, empty branch, refrigeration and Aero-Space.
Medium distribution inequality is to cause its heat transfer property main reasons for decrease in the plate type finned heat exchanger; When especially being gas-liquid two-phase to medium; Because gas-liquid two-phase density is different; There is some difference for inertial flow, causes the more serious distribution inequality of gas-liquid two-phase existence in each passage of heat interchanger, causes the heat interchanger heat exchange efficiency significantly to reduce.For this reason, be necessary the flow characteristics of gas-liquid two-phase in the plate type finned heat exchanger is studied,, improve the distribution situation of two-phase flow in it, and finally improve the heat exchange property of heat interchanger through operating mode or architecture advances.
At present, to the distribution character of two-phase flow in the plate type finned heat exchanger, except theoretical and numerical value research, many scholars have also carried out experimental study.Because the plate type finned heat exchanger internal channel is numerous and narrow and small; Measure unrealistic respectively to each passage; For this reason, practices well is that the plate type finned heat exchanger outlet evenly is divided into several regions, and a runner is drawn in each zone; Through measurement to gas-liquid two-phase in each runner, thus macroscopical distribution character of gas-liquid two-phase in the acquisition heat interchanger.During measurement, switch through valve, successively each tested runner is introduced the arm pipeline separately with some cycles and carry out gas-liquid separation and measurement, other runners are then introduced and are gathered pipeline, and finally introduce in corresponding water tank or the aqua storage tank.In the experimentation; Because it is different with the arm pressure-drop in pipeline to gather pipeline; For this reason, need with gathering throttling valve to be installed on the pipeline at the arm pipeline, and at the arm pipeline and gather differential pressure pickup is installed between pipeline; Through regulating throttling valve guaranteeing the arm pipeline and to gather between pipeline pressure reduction approximate, thereby reduce the tube fluid change of flow state that cause because of the pressure drop difference.Because in the actual measurement process, the switching influence of each outlet between immixture that gathers pipeline and valve will cause and gather pipeline and the certain fluctuation of arm pipeline inner pressure generation, need artificial continuous adjustment throttling valve.Therefore, there is certain error in this type of measuring method, and measurement stability is relatively poor.
The utility model content
The technical matters that the utility model will solve is, overcomes the deficiency that prior art exists, and a kind of new plate type finned heat exchanger biphase gas and liquid flow distribution character proving installation is provided.
Be the technical solution problem, the utility model is taked following technical scheme:
The utility model provides a kind of plate type finned heat exchanger biphase gas and liquid flow distribution character proving installation; Comprise that being arranged in plate type finned heat exchanger respectively exports the runner of respectively drawing in the even zoning, is provided with gas-liquid separator and flow measurement device on each runner of drawing.
As a kind of improvement, said runner of respectively drawing is arranged on the same surface level.
As a kind of improvement, the inlet tube of described gas-liquid separator is installed on the separation vessel side with tangential direction, and rising pipe is installed on the bottom, takes the shape of the letter U.
As a kind of improvement, said flow measurement device comprises gas turbine meter and graduated cylinder.
As a kind of improvement; The porch of said plate type finned heat exchanger and the runner of respectively drawing are equipped with pressure transducer and temperature sensor, and flow measurement device and each pressure transducer, temperature sensor all are connected to industrial computer through signal wire through data acquisition system (DAS).
As a kind of improvement, be connected to air and liquid mixer on the entrance pipe of said plate type finned heat exchanger, liquid feed line and gas supply pipeline all are connected to air and liquid mixer.
As a kind of improvement, described air and liquid mixer is divided into one road liquid-inlet section, three tunnel gas feed sections and four road gas liquid outlet sections; Wherein, the liquid-inlet section is offered and is uniformly distributed with aperture, the terminal atomizer of installing of gas liquid outlet.
As a kind of improvement, the equipment on the said liquid feed line comprises aqua storage tank, centrifugal water pump, liquid filter and the liquid spinner-type flowmeter that connects successively, and the liquid spinner-type flowmeter is connected to air and liquid mixer; Equipment on the said gas supply pipeline comprises screw-rod air compressor, surge tank, main air filtrator, secondary air filtrator, reduction valve and the gas rotameter that connects successively, and gas rotameter is connected to air and liquid mixer.
The said plate type finned heat exchanger biphase gas and liquid flow of the utility model distribution character proving installation; Its application method comprises: make gas-liquid two-phase flow into plate type finned heat exchanger; And plate type finned heat exchanger outlet evenly is divided into several regions; A runner is drawn in each zone, and gas-liquid two-phase in each runner is measured; On each runner of drawing, gas-liquid separator and flow measurement device are set all, simultaneously gas-liquid two-phase in each runner are separated and measure.On the porch of plate type finned heat exchanger and the runner of respectively drawing, pressure transducer and temperature sensor are set; By data acquisition system (DAS) the measuring-signal of each pressure transducer, temperature sensor and flow measurement device in the test process is sent to industrial computer, and carries out data processing and graphic presentation by industrial computer.
The beneficial effect of the utility model is:
Because the utility model adopts the gas-liquid two-phase based on polynary and geodesic structure to separate and measuring system; Biphase gas and liquid flow to each outlet of plate type finned heat exchanger separates simultaneously and measures; Avoided because of pressure drop does not wait the tube fluid change of flow state that causes, owing to need not the complicated switched system of mounting structure, eliminated because of valve switches the tube fluid that causes and fluctuateed simultaneously; Therefore, have accuracy of detection height, simple in structure, easy to operate and real-time advantages of higher.
Description of drawings
Fig. 1 is the structural representation of the described measurement mechanism of the utility model.
The gas-liquid two-phase that Fig. 2 is based on polynary and geodesic structure separates and the measuring system vertical view.
The gas-liquid two-phase that Fig. 3 is based on prior art separates and the measuring system synoptic diagram.
Drawing reference numeral explanation: 1 aqua storage tank; 2 liquid filters; 3,6,9 variable valve; 4 centrifugal water pumps; 5 T-valve; 7 liquid spinner-type flowmeters; 8 gas rotameters; 10 reduction valve; 11 secondary air filtrators; 12 main air filtrators; 13 surge tanks; 14 screw-rod air compressors; 15 air and liquid mixers; 16 straight-through visors; 17,20 pressure transducers; 18,21 temperature sensors; 19 plate type finned heat exchangers; 22 gas-liquid separators; 23 gas turbine meters; 24 graduated cylinders; 25 data acquisition system (DAS)s; 26 industrial computers; 27,31 throttling valve; 28 measure arm; 29 differential pressure pick-ups; 30 measure house steward.
Embodiment
In the utility model; Gas and liquid mix through air and liquid mixer; The gas-liquid two-phase that forms flows into plate type finned heat exchanger; And forming certain gas-liquid distribution within it, the two-phase flow that adopts gas-liquid separator and flow measurement device heat exchanging device to export separates and measures, thereby obtains the distribution character of two-phase flow in the plate type finned heat exchanger.Employing separates based on the gas-liquid two-phase of polynary and geodesic structure and with measuring system each biphase gas and liquid flow that exports of plate type finned heat exchanger is separated and measure.Separate to refer to each outlet of plate type finned heat exchanger with measuring system and all be connected gas-liquid separator and flow measurement device based on the gas-liquid two-phase of polynary and geodesic structure, each biphase gas and liquid flow that exports of heat exchanging device separates and measures simultaneously.
Below in conjunction with accompanying drawing 1,2,3 this utility model is done detailed description.
The method of testing of the said device of the utility model comprises following operation steps:
1, gas circuit transmission
Screw-rod air compressor 14 work; The air of certain flow V1 is squeezed into surge tank 13, treat that surge tank 13 reaches specified pressure P1 after, screw-rod air compressor 14 stops automatically; At this moment; Open variable valve 9, air flows out from surge tank 13 immediately, passes through main air filtrator 12, secondary air filtrator 11, reduction valve 10 and gas rotameter 8 successively.Wherein, main air filtrator 12 and secondary air filtrator 11 are used for the impurity of filtered air, and reduction valve 10 is used for stablizing the pressure P 2 of gas circuit, and gas rotameter 8 is used for the flow of Measurement of Air.Treat pressure in the surge tank 13 reduce to specified pressure P3 (behind P2＜P3＜P1), screw-rod air compressor 14 is opened tonifying Qi automatically, and air compensation should be greater than ducted gas flow, treat that surge tank 13 reaches specified pressure P1 after, screw-rod air compressor 14 stops automatically.
2, water route transmission
Open bypass valve 3 and main inlet control valve 6, and start centrifugal water pump 4, the water in the aqua storage tank 1 is pumped into the water route pipeline, pass through liquid filter 2, clarified water pump 4, T-valve 5, variable valve 3,6 and liquid spinner-type flowmeter 7 successively.Wherein, liquid filter 2 is used for the impurity of filtered water, and variable valve 3,6 is used for regulating pondage, and liquid spinner-type flowmeter 7 is used for measuring the water yield of pipeline.
3, gas-liquid mixed
The empty G&W that transmits by the road mixes in air and liquid mixer 15, and forms the atomizing two-phase flow that certain gas liquid ratio and gas-liquid distribute, and this two-phase flow is gone in the plate type finned heat exchanger 19 through straight-through visor 16 is laggard.Straight-through visor 16 is used for the gas-liquid two-phase fluidised form that naked-eye observation forms.
4, gas-liquid separation
After air and liquid mixer 15 mixed biphase gas and liquid flows flow into plate type finned heat exchanger 19, carry out gas-liquid within it and distribute, the biphase gas and liquid flow after the distribution flows out from 8 way outlets of plate type finned heat exchanger 19; Get into each self-corresponding gas-liquid separator 22 respectively and carry out gas-liquid separation and measurement with flowmeter; Wherein, the gas phase of separation flows out from separation vessel top, and measures through gas turbine meter 23; The liquid phase of separating then relies on gravity and centrifuging to flow into separation vessel bottom and accumulation; After the liquid phase level of accumulative total in the gas-liquid separator rose to certain altitude, water overflowed from U type pipe, and the water yield of overflowing is measured through graduated cylinder 24 and stopwatch.
5, DATA REASONING
Experiment is carried out in the process, obtains the parameter informations such as gas phase flow that the out temperature of plate plate type finned heat exchanger 19 separates with force value and gas-liquid separator 22 in real time through data acquisition system (DAS).Wherein plate type finned heat exchanger 19 out temperatures and pressure obtain through temperature sensor 18,21 and pressure transducer 17,20, and the gas phase flow after plate type finned heat exchanger 19 each way outlet separate is then measured acquisition by the gas turbine meter 23 of correspondence simultaneously.All information are gathered to industrial computer 26 through data acquisition system (DAS) 25 and are carried out data processing and graphic presentation, finally obtain the distribution character of biphase gas and liquid flow in the plate type finned heat exchanger.
Embodiment one
Opening screw-rod air compressor 14, is 54m with flow
3The air of/h is squeezed into surge tank 13, and when treating that the surge tank internal pressure reaches to 0.8MPa, screw-rod air compressor 14 stops automatically; Open variable valve 9; Air gets into the gas circuit pipeline, through regulate reduction valve 10 with the gas circuit pressure stability at 0.3MPa, adjustment variable valve 9 apertures; And check gas rotameter 8 flow values, with the flow control of gas circuit air at 30m
3/ h, treat that surge tank 13 internal pressures reduce to 0.4MPa after, set screw-rod air compressor 14 and open tonifying Qi automatically.Open in the water route bypass valve 3 and main inlet control valve 6, start centrifugal water pump 4, adjustment bypass valve 3 and main inlet control valve 6, and check the flow value on the liquid spinner-type flowmeter 7, with the water route flow control at 80L/h.The empty G&W that transmits by the road mixes in air and liquid mixer 15; Form atomizing two-phase flow that certain gas-liquid volume ratio (325: 1) and gas-liquid distribute and get into plate type finned heat exchanger 19 and distribute, 8 way outlets from plate type finned heat exchanger 19 of the two-phase flow after the distribution flow out, and get into gas-liquid two-phase based on polynary and geodesic structure and separate and separate with measuring system and measure; As shown in Figure 2; Through data acquisition and finishing analysis, heat exchanger exit kernel of section zone gas phase and liquid phase flow are bigger, and both sides distribute then less; Gas phase whole unevenness in heat exchanger exit place is approximately 8.32%～12.25%, and the whole unevenness of liquid phase is approximately 17.31%～20%.
Embodiment two
Opening screw-rod air compressor 14, is 54m with flow
3The air of/h is squeezed into surge tank 13, and when treating that the surge tank internal pressure reaches to 0.8MPa, screw-rod air compressor 14 stops automatically, opens variable valve 9, and air gets into gas circuit
Pipeline, through regulate reduction valve 10 with the gas circuit pressure stability at 0.5MPa, adjustment variable valve 9 apertures, and check gas rotameter 8 flow values, with the flow control of gas circuit air at 50m
3/ h, treat that surge tank 13 internal pressures reduce to 0.6MPa after, set screw-rod air compressor 14 and open tonifying Qi automatically.Open in the water route bypass valve 3 and main inlet control valve 6, start centrifugal water pump 4, adjustment bypass valve 3 and main inlet control valve 6, and check the flow value on the liquid spinner-type flowmeter 7, with the water route flow control at 80L/h.The empty G&W that transmits by the road mixes in air and liquid mixer 15; Form atomizing two-phase flow that certain gas-liquid volume ratio (625: 1) and gas-liquid distribute and get into plate type finned heat exchanger 19 and distribute, 8 way outlets from plate type finned heat exchanger 19 of the two-phase flow after the distribution flow out, and get into gas-liquid two-phase based on polynary and geodesic structure and separate and separate with measuring system and measure; As shown in Figure 2; Through data acquisition and finishing analysis, heat exchanger exit kernel of section zone gas phase and liquid phase flow are bigger, and both sides distribute less; Gas phase whole unevenness in heat exchanger exit place is approximately 5.37%～7.12%, and the whole unevenness of liquid phase is approximately 25.31%～28.25%.
Can know by above two embodiment; Gas-liquid two-phase is flowed through after plate fin heat-exchanging 19 distributes, and heat exchanger exit kernel of section zone gas phase is bigger with the liquid phase flow, and the both sides distribution is less; And in the biphase gas and liquid flow; Along with the gas phase ratio increases, plate type finned heat exchanger 19 exit gas phases distribute and are tending towards evenly, and liquid phase distributes and then is tending towards inhomogeneous.
The comparative example
The operation steps that provides by the foregoing description one; The control air flow is 30m3/h; Discharge is 80L/h, and after air and liquid mixer 15 mixed, the atomizing two-phase flow that forms the distribution of certain gas-liquid volume ratio (625: 1) and gas-liquid got into plate type finned heat exchanger 19 and distributes; Adopt the gas-liquid two-phase based on the arm flow dividing structure to separate and measuring system simultaneously, each way outlet gas-liquid flow of heat exchanging device carries out separating and measuring.As shown in Figure 3; 1. outlet stool to be measured is introduced measurement arm 28, and all the other outlet stools are introduced and are measured house stewards 30, adjustment throttling valve 27; 31 apertures; When differential pressure pick-up 29 displayed values are 0, record gas turbine meter 21 corresponding flow values, and adopt graduated cylinder 24 and stopwatch that discharge is measured.In the measuring process; Owing to measure the immixture of multi-path fluid in the house steward; Displayed value produces cyclic fluctuation on the differential pressure pick-up 29, need artificially constantly adjust the aperture of throttling valve 27,31, through repeatedly adjusting and can knowing from the data of flowmeter acquisition; The gas flow fluctuation range that 1. outlet stool is surveyed is about ± 15%; Adopt said method respectively 2., 3., 4., 5., 6., 7. and 8. measure, can know that to the data analysis that experiment obtains the gas flow fluctuation range is between ± 10%～20% outlet stool.To the liquid phase flow, owing to adopt graduated cylinder 24 and stopwatch to measure, because of the flow measurement error that the fluid fluctuation causes can't be estimated.
Therefore, can know, separate with measuring system with gas-liquid two-phase and compare that it is higher to adopt gas-liquid two-phase based on the arm flow dividing structure to separate the gas-liquid flow error of measuring with measuring system, and stability can not get assurance based on polynary and geodesic structure by the comparative example.
Claims (8)
1. plate type finned heat exchanger biphase gas and liquid flow distribution character proving installation; Comprise that being arranged in plate type finned heat exchanger respectively exports the runner of respectively drawing in the even zoning; It is characterized in that, on each runner of drawing, be provided with gas-liquid separator and flow measurement device.
2. device according to claim 1 is characterized in that, said runner of respectively drawing is arranged on the same surface level.
3. device according to claim 1 is characterized in that the inlet tube of described gas-liquid separator is installed on the separation vessel side with tangential direction, and rising pipe is installed on the bottom, takes the shape of the letter U.
4. device according to claim 1 is characterized in that said flow measurement device comprises gas turbine meter and graduated cylinder.
5. device according to claim 1; It is characterized in that; The porch of said plate type finned heat exchanger and the runner of respectively drawing are equipped with pressure transducer and temperature sensor, and flow measurement device and each pressure transducer, temperature sensor all are connected to industrial computer through signal wire through data acquisition system (DAS).
6. device according to claim 1 is characterized in that, is connected to air and liquid mixer on the entrance pipe of said plate type finned heat exchanger, and liquid feed line and gas supply pipeline all are connected to air and liquid mixer.
7. device according to claim 6 is characterized in that, described air and liquid mixer is divided into one road liquid-inlet section, three tunnel gas feed sections and four road gas liquid outlet sections; Wherein, the liquid-inlet section is offered and is uniformly distributed with aperture, the terminal atomizer of installing of gas liquid outlet.
8. device according to claim 6 is characterized in that, the equipment on the said liquid feed line comprises aqua storage tank, centrifugal water pump, liquid filter and the liquid spinner-type flowmeter that connects successively, and the liquid spinner-type flowmeter is connected to air and liquid mixer; Equipment on the said gas supply pipeline comprises screw-rod air compressor, surge tank, main air filtrator, secondary air filtrator, reduction valve and the gas rotameter that connects successively, and gas rotameter is connected to air and liquid mixer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205446684U CN202403998U (en) | 2011-12-22 | 2011-12-22 | Plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205446684U CN202403998U (en) | 2011-12-22 | 2011-12-22 | Plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device |
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| CN202403998U true CN202403998U (en) | 2012-08-29 |
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| CN2011205446684U Expired - Fee Related CN202403998U (en) | 2011-12-22 | 2011-12-22 | Plate-fin heat exchanger gas-liquid two-phase flow distribution characteristic testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539284A (en) * | 2011-12-22 | 2012-07-04 | 浙江大学 | Method and device for testing distribution characteristics of gas-liquid two-phase flow of plate-fin heat exchanger |
| CN108601311A (en) * | 2018-06-21 | 2018-09-28 | 南方电网科学研究院有限责任公司 | A kind of Phase cooling radiator |
| CN108801844A (en) * | 2018-08-08 | 2018-11-13 | 江苏省水利科学研究院 | A kind of aeration concentrater measuring device and method |
-
2011
- 2011-12-22 CN CN2011205446684U patent/CN202403998U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539284A (en) * | 2011-12-22 | 2012-07-04 | 浙江大学 | Method and device for testing distribution characteristics of gas-liquid two-phase flow of plate-fin heat exchanger |
| CN102539284B (en) * | 2011-12-22 | 2014-04-02 | 浙江大学 | Method and device for testing distribution characteristics of gas-liquid two-phase flow of plate-fin heat exchanger |
| CN108601311A (en) * | 2018-06-21 | 2018-09-28 | 南方电网科学研究院有限责任公司 | A kind of Phase cooling radiator |
| CN108801844A (en) * | 2018-08-08 | 2018-11-13 | 江苏省水利科学研究院 | A kind of aeration concentrater measuring device and method |
| CN108801844B (en) * | 2018-08-08 | 2024-04-02 | 江苏省水利科学研究院 | Device and method for measuring aeration concentration |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20151222 |
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| EXPY | Termination of patent right or utility model |