CN104198526A - Experimental device for researching influence on flow boiling heat exchange of heat exchange surface - Google Patents
Experimental device for researching influence on flow boiling heat exchange of heat exchange surface Download PDFInfo
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- CN104198526A CN104198526A CN201410450374.3A CN201410450374A CN104198526A CN 104198526 A CN104198526 A CN 104198526A CN 201410450374 A CN201410450374 A CN 201410450374A CN 104198526 A CN104198526 A CN 104198526A
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- heat exchange
- flow boiling
- exchange surface
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Abstract
The invention discloses an experimental device for researching the influence on flow boiling heat exchange of a heat exchange surface. The experimental device comprises a temperature control detection device which comprises a heat exchange surface temperature control system and a flow boiling detection unit, wherein the heat exchange surface temperature control system comprises a heating device; an extension part is arranged at the upper end of the heating device; the flow boiling detection unit comprises an upper end plate, a lower end plate and a glass plate frame between the upper end plate and the lower end plate; the upper end plate, the lower end plate and the glass plate frame define a heat exchange space. According to the invention, the influence of pressure fluctuation on flow boiling can be reduced by virtue of a wide channel, bubble formation and separation in the boiling process can be conveniently observed by virtue of the glass plate frame, and the density of flow boiling heat flow on the heat exchange surface is calculated through measurement of experiment parameters. Moreover, the heat exchange surface can be replaced, so that the flow boiling heat transfer characteristics of different heat exchange surfaces can be researched.
Description
Technical field
The present invention relates to flow boiling and heat transfer field, specifically a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer.
Background technology
Flow boiling is widely used as high efficient heat exchanging effect, and the heat transfer characteristic that improves flow boiling is more and more taken seriously in heat transfer and refrigerating field.The improvement on heat exchanging surface is the effective ways of enhanced flow boiling heat exchange.Therefore the impact of studying various heat exchange surface flow boiling heat transfer effect is most important.
At present flow boiling test operation, studies pipe flow boiling interior or micro-, narrow rectangular channel mostly, and the part of detecting of experiment table is all made of one, cannot local replacing, and also cannot observe inner experimental phenomena from installing outside.And pressure in pipe or in micro-, narrow rectangular channel is higher, and flow boiling experiment exerts an influence.
Summary of the invention
According to the prior art of above-mentioned proposition cannot local replacing, observe inner experimental phenomena and internal pressure compared with high-technology problem, and provide a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer
The technological means that the present invention adopts is as follows:
An experimental provision of studying the impact of heat exchange surface flow boiling heat transfer, comprises a temperature control pick-up unit,
Described temperature control pick-up unit comprises heat exchange surface temperature control system and flow boiling detecting unit;
Described heat exchange surface temperature control system comprises a heating arrangement,
Described heating arrangement upper end is provided with an extension, and described extension is provided with multiple temperature sensor mounted holes, and the axis in described hole is perpendicular to the extending direction of described extension, and the material of described extension is copper;
Described flow boiling detecting unit comprises upper head plate, bottom plate and the glass sheet frame between described upper head plate and described bottom plate, and described upper head plate, described bottom plate and described glass sheet frame surround a heat transfer space,
Described upper head plate is provided with working medium fluid intake, working medium fluid egress point and multiple temperature sensor mounted through hole, and described working medium fluid intake and described working medium fluid egress point lay respectively at the two ends of described upper head plate,
Described bottom plate is provided with the groove that holds described extension, and described groove is provided with a heat exchanger fin near one end of the upper surface of described bottom plate, the upper surface of described heat exchanger fin and the upper surface of described bottom plate in same plane,
Described flow boiling detecting unit supports by a support portion.
Further, between the sidewall of described extension and the inwall of described groove, be provided with the gap for filling with insulation material, between the top of described extension and described heat exchanger fin, scribble heat-conducting silicone grease.
Further, described heating arrangement is filled circles column, the material of described solid cylinder is copper, and described heating arrangement is embedded with four equally distributed tubular well heaters of the axis around described heating arrangement, and the axis of described tubular well heater is parallel to the axis of described heating arrangement.
Further, between described upper head plate and described glass sheet frame and between described bottom plate and described glass sheet frame, be connected by groove respectively, between described groove and described glass sheet frame, be also provided with sealing gasket, the material of described upper head plate and the material of described bottom plate are aluminium.
Further, described support portion comprises upper supporting plate, lower carrier plate and the floor that is positioned at described upper supporting plate and described lower carrier plate, and the lower end of described heating arrangement is connected with the upper surface of described lower carrier plate by insulation blanket, and described extension is through described upper supporting plate.
Further, described gap is 1mm.
Further, described upper supporting plate is provided with multiple for adjusting the thumbscrew of levelness of described flow boiling detecting unit.
Further, described experimental provision also comprises water circulation system, water temperature control system and data acquisition system (DAS);
Described water circulation system comprises constant temperature reservoir, described constant temperature reservoir is provided with water-level gauge and electromagnetic centrifugal pump, described electromagnetic centrifugal pump is communicated with described working medium fluid intake by flowmeter, is also provided with the by-pass valve being communicated with described constant temperature reservoir between described electromagnetic centrifugal pump and described flowmeter;
Described water temperature control system comprises refrigeratory and the well heater that is positioned at described constant temperature reservoir, and described refrigeratory is communicated with described working medium fluid egress point by filtrator, and described refrigeratory is also communicated with by pipeline one with described constant temperature reservoir;
Described data acquisition system (DAS) comprises for the temperature sensor of collecting temperature data with for the computing machine of analysis temperature data;
Under duty, working medium in described constant temperature reservoir is pumped into described flow boiling detecting unit by described electromagnetic centrifugal pump, and get back in described constant temperature reservoir by described filtrator and described refrigeratory successively, working medium is passed through respectively described constant temperature reservoir, described electromagnetic centrifugal pump, described flowmeter, enter into described flow boiling detecting unit from described working medium fluid intake, leave described flow boiling detecting unit from described working medium fluid egress point, enter into described refrigeratory through described filtrator, and finally get back in described constant temperature reservoir.
Compared with prior art, the present invention adopts fat pipe can reduce the impact of pressure surge for flow boiling, while therefore studying various heat exchange surface, adopts the fat pipe flow boiling and heat transfer effect of objective appraisal heat-transfer surface more.
The present invention adopts transparent glass sheet frame, is convenient to observe formation and the disengaging of bubble in boiling process, thereby judges the impact of heat exchange surface flow boiling.
The present invention by experiment parameter measurement calculates the heat flow density of flow boiling on heat exchange surface adjustable heat exchange surface temperature and working medium fluid temperature (F.T.) and flow.Experimental data when on different Temperature of Workings and different working medium flow is analyzed the impact of comparative study heat exchange surface flow boiling heat transfer.
The present invention can change heat exchange surface, thus the characteristics of flow boiling heat transfer on research various heat exchange surface.
The present invention can extensively promote in fields such as flow boiling and heat transfer fields for the foregoing reasons.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is temperature control structure of the detecting device schematic diagram of the present invention.
Fig. 2 be in Fig. 1 A-A to schematic diagram.
Fig. 3 is the vertical view of temperature control pick-up unit of the present invention.
Fig. 4 be in Fig. 3 B-B to schematic diagram.
Fig. 5 is experimental provision structural representation in the specific embodiment of the present invention.
Fig. 6 is the left view of experimental provision in the specific embodiment of the present invention.
Fig. 7 is the right view of experimental provision in the specific embodiment of the present invention.
Fig. 8 is the vertical view of experimental provision in the specific embodiment of the present invention.
Wherein, 1, temperature control pick-up unit, 2, constant temperature liquid reserve tank, 3, refrigeratory, 4, vacuum meter, 5, tensimeter, 6, thermometer;
11, heating arrangement, 12, flow boiling detecting unit, 13, support portion, 21, water-level gauge, 22, electromagnetic centrifugal pump, 23, flowmeter, 24, by-pass valve, 31, filtrator, 32, web joint, 33, pipeline one, 34, bearing;
111, extension, 112, tubular well heater, 113, insulation blanket, 121, upper head plate, 122, bottom plate, 123, glass sheet frame, 124, bolt, 131, upper supporting plate, 132, lower carrier plate, 133, floor;
1111, temperature sensor one, 1112, temperature sensor two, 1113, temperature sensor three, 1114, temperature sensor four, 1211, working medium fluid intake, 1212, working medium fluid egress point, 1213, temperature sensor five, 1214, temperature sensor six, 1215, temperature sensor seven, 1221, groove, 1222, heat exchanger fin, 1231, sealing gasket, 1311, thumbscrew.
Embodiment
As Figure 1-Figure 4, a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer, comprises a temperature control pick-up unit 1,
Described temperature control pick-up unit 1 comprises heat exchange surface temperature control system and flow boiling detecting unit 12;
Described heat exchange surface temperature control system comprises a heating arrangement 11,
Described heating arrangement upper end is provided with an extension 111, described extension 111 is provided with four temperature sensor mounted holes, the axis in described hole is perpendicular to the extending direction of described extension 111, the material of described extension 111 is copper, in four described holes, be separately installed with temperature sensor 1, temperature sensor 2 1112, temperature sensor 3 1113, temperature sensor 4 1114, described temperature sensor 2 1112, described temperature sensor 3 1113 and described temperature sensor 4 1114 distribute along the extending direction of described extension 111, described temperature sensor 1 and the extending direction of described temperature sensor 2 1112 place planes perpendicular to described extension 111,
Described flow boiling detecting unit 12 comprises upper head plate 121, bottom plate 122 and the glass sheet frame 123 between described upper head plate 121 and described bottom plate 122, described upper head plate 121, described bottom plate 122 and described glass sheet frame 123 surround a heat transfer space and coordinate fastening with nut by eight groups of bolts 124
Described upper head plate 121 is provided with working medium fluid intake 1211, working medium fluid egress point 1212 and three temperature sensor mounted through holes, described working medium fluid intake 1211 and described working medium fluid egress point 1212 lay respectively at the two ends of described upper head plate 121, in three described through holes, be separately installed with temperature sensor 5 1213, temperature sensor 6 1214 and temperature sensor 7 1215, on described working medium fluid intake 1211, be also provided with vacuum meter 4, the top of described constant temperature liquid reserve tank 2 is provided with tensimeter 5, and the sidewall of described constant temperature liquid reserve tank 2 is provided with thermometer 6;
Described bottom plate 122 is provided with the groove 1221 that holds described extension 111, described groove 1221 is provided with a heat exchanger fin 1222 near one end of the upper surface of described bottom plate 122, the upper surface of the upper surface of described heat exchanger fin 1222 and described bottom plate 122 in same plane, described temperature sensor 6 1214 be positioned at described heat exchanger fin 1222 directly over;
Described working medium fluid intake 1211, described temperature sensor 5 1213, described temperature sensor 6 1214, described temperature sensor 7 1215 and described working medium fluid egress point 1212 are arranged in order along described upper head plate 121 length directions,
Described flow boiling detecting unit 12 supports by a support portion 13.
Between the inwall of the sidewall of described extension 111 and described groove 1221, be provided with the gap for filling with insulation material, between the top of described extension 111 and described heat exchanger fin 1222, scribble heat-conducting silicone grease.
Described heating arrangement 11 is filled circles column, the material of described solid cylinder is copper, described heating arrangement 11 is embedded with four equally distributed tubular well heaters 112 of the axis around described heating arrangement 11, and the axis of described tubular well heater 112 is parallel to the axis of described heating arrangement 11.
Between described upper head plate 121 and described glass sheet frame 123 and between described bottom plate 122 and described glass sheet frame 123, be connected by groove respectively, between described groove and described glass sheet frame 123, be also provided with sealing gasket 1231, the material of the material of described upper head plate 121 and described bottom plate 122 is aluminium.
Described support portion 13 comprises upper supporting plate 131, lower carrier plate 132 and the floor 133 that is positioned at described upper supporting plate 131 and described lower carrier plate 132, the lower end of described heating arrangement 11 is connected with the upper surface of described lower carrier plate 132 by insulation blanket 113, and described extension 111 is through described upper supporting plate 131.
Described gap is 1mm.
Described upper supporting plate 131 is provided with four four angles that lay respectively at described upper supporting plate 131 for adjusting 1311, four described thumbscrews 1311 of thumbscrew of levelness of described flow boiling detecting unit 12.
As shown in Figure 5-Figure 8, described experimental provision also comprises water circulation system, water temperature control system and data acquisition system (DAS);
Described water circulation system comprises constant temperature reservoir 2, described constant temperature reservoir 2 is provided with water-level gauge 21 and electromagnetic centrifugal pump 22, described electromagnetic centrifugal pump 22 is communicated with described working medium fluid intake 1211 by flowmeter 23, is also provided with the by-pass valve 24 being communicated with described constant temperature reservoir 2 between described electromagnetic centrifugal pump 22 and described flowmeter 23;
Described water temperature control system comprises refrigeratory 3 and is positioned at the well heater of described constant temperature reservoir 2, described refrigeratory 3 is communicated with described working medium fluid egress point 1212 by filtrator 31, described refrigeratory 3 is also communicated with by pipeline 1 with described constant temperature reservoir 2, on described refrigeratory 3, be also provided with bearing 34, between described refrigeratory 3 and described constant temperature reservoir 2, be fixedly connected with by web joint 32;
Under duty, the working medium in described constant temperature reservoir 2 is pumped into described flow boiling detecting unit 12 by described electromagnetic centrifugal pump 22, and gets back in described constant temperature reservoir 2 by described filtrator 31 and described refrigeratory 3 successively.
Describe the operation steps of test macro of the present invention below in detail with a specific embodiment:
(1) will after clean described heat exchanger fin 1222, be fixed on described groove 1221 one end near the upper surface of described bottom plate 122 with high-temperature plastic, the upper surface of the upper surface of described heat exchanger fin 1222 and described bottom plate 122 is in same plane.
(2) described flow boiling detecting unit 12 is installed, by turning wing nut and the horizontal level with surveyor's staff measuring and adjusting detecting unit.
(3) adopt and go mineral water to be injected into described constant temperature reservoir 2 as working medium fluid, carry out opening described electromagnetic centrifugal pump 22 after the bake out of a period of time.
(4) regulate working medium fluid degree of supercooling, the heat exchange surface degree of superheat, working medium fluid flow, and in the time that each parameter reaches stable state record data.
(5) carry out image acquisition and the interpretation of the flow boiling phenomenon under each stable state.
The test result obtaining is as follows:
The temperature data that described temperature sensor 1 gathers is T
1=122.65 DEG C, the temperature data that described temperature sensor 2 1112 gathers is T
2=123.47 DEG C, the temperature data that described temperature sensor 3 1113 gathers is T
3=125.74 DEG C, the temperature data that described temperature sensor 4 1114 gathers is T
4=128.31 DEG C, the temperature data that described temperature sensor 5 1213 gathers is T
5=80.01 DEG C, the temperature data that described temperature sensor 6 1214 gathers is T
6=79.83 DEG C, the temperature data that described temperature sensor 7 1215 gathers is T
7=79.77 DEG C,
When above DATA REASONING, room temperature is T
0=26.74 DEG C,
Depress the boiling point T of water at a normal atmosphere
satbe 100 DEG C,
The heat exchange surface degree of superheat is:
Wherein, T is heat exchange surface temperature, x
2-x is the distance that heat exchange surface arrives described temperature sensor 2 1112, and unit is rice, x
3-x
2for described temperature sensor 3 1113 is to the distance of described temperature sensor 2 1112, unit is rice.
Working medium fluid degree of supercooling:
ΔT
sub＝T
sat-T
5＝100-80.01≈20℃
Heat flow density on heat exchange surface:
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; any be familiar with those skilled in the art the present invention disclose technical scope in; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. an experimental provision of studying the impact of heat exchange surface flow boiling heat transfer, is characterized in that: described experimental provision comprises a temperature control pick-up unit,
Described temperature control pick-up unit comprises heat exchange surface temperature control system and flow boiling detecting unit;
Described heat exchange surface temperature control system comprises a heating arrangement,
Described heating arrangement upper end is provided with an extension, and described extension is provided with multiple temperature sensor mounted holes, and the axis in described hole is perpendicular to the extending direction of described extension, and the material of described extension is copper;
Described flow boiling detecting unit comprises upper head plate, bottom plate and the glass sheet frame between described upper head plate and described bottom plate, and described upper head plate, described bottom plate and described glass sheet frame surround a heat transfer space,
Described upper head plate is provided with working medium fluid intake, working medium fluid egress point and multiple temperature sensor mounted through hole, and described working medium fluid intake and described working medium fluid egress point lay respectively at the two ends of described upper head plate,
Described bottom plate is provided with the groove that holds described extension, and described groove is provided with a heat exchanger fin near one end of the upper surface of described bottom plate, the upper surface of described heat exchanger fin and the upper surface of described bottom plate in same plane,
Described flow boiling detecting unit supports by a support portion.
2. a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer according to claim 1, it is characterized in that: between the sidewall of described extension and the inwall of described groove, be provided with the gap for filling with insulation material, between the top of described extension and described heat exchanger fin, scribble heat-conducting silicone grease.
3. a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer according to claim 1, it is characterized in that: described heating arrangement is filled circles column, the material of described solid cylinder is copper, described heating arrangement is embedded with four equally distributed tubular well heaters of the axis around described heating arrangement, and the axis of described tubular well heater is parallel to the axis of described heating arrangement.
4. a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer according to claim 1, it is characterized in that: between described upper head plate and described glass sheet frame and between described bottom plate and described glass sheet frame, be connected by groove respectively, between described groove and described glass sheet frame, be also provided with sealing gasket, the material of described upper head plate and the material of described bottom plate are aluminium.
5. a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer according to claim 1, it is characterized in that: described support portion comprises upper supporting plate, lower carrier plate and the floor that is positioned at described upper supporting plate and described lower carrier plate, the lower end of described heating arrangement is connected with the upper surface of described lower carrier plate by insulation blanket, and described extension is through described upper supporting plate.
6. a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer according to claim 2, is characterized in that: described gap is 1mm.
7. a kind of experimental provision of studying heat exchange surface flow boiling heat transfer impact according to claim 5, is characterized in that: described upper supporting plate is provided with multiple for adjusting the thumbscrew of levelness of described flow boiling detecting unit.
8. according to a kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer described in the arbitrary claim of claim 1 to 7, it is characterized in that: described experimental provision also comprises water circulation system water temperature control system and data acquisition system (DAS);
Described water circulation system comprises constant temperature reservoir, described constant temperature reservoir is provided with water-level gauge and electromagnetic centrifugal pump, described electromagnetic centrifugal pump is communicated with described working medium fluid intake by flowmeter, is also provided with the by-pass valve being communicated with described constant temperature reservoir between described electromagnetic centrifugal pump and described flowmeter;
Described water temperature control system comprises refrigeratory and the well heater that is positioned at described constant temperature reservoir, and described refrigeratory is communicated with described working medium fluid egress point by filtrator, and described refrigeratory is also communicated with by pipeline one with described constant temperature reservoir;
Described data acquisition system (DAS) comprises for the temperature sensor of collecting temperature data with for the computing machine of analysis temperature data;
Under duty, the working medium in described constant temperature reservoir is pumped into described flow boiling detecting unit by described electromagnetic centrifugal pump, and gets back in described constant temperature reservoir by described filtrator and described refrigeratory successively.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828006A (en) * | 2018-06-27 | 2018-11-16 | 西安交通大学 | A kind of flowing of micro-channel heat exchanger and phase-change heat transfer experiment test platform and operating method |
| CN110044953A (en) * | 2019-03-26 | 2019-07-23 | 南京航空航天大学 | Boiling crisis Heat Flow Experiment device is flowed under a kind of hypergravity |
| CN114002262A (en) * | 2021-11-03 | 2022-02-01 | 重庆大学 | Four-side visible pressurized flow boiling experimental device |
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| CN101871902A (en) * | 2010-05-24 | 2010-10-27 | 北京科技大学 | Test device and test method for limit heat-flow density of porous material for heat pipe |
| CN103323488A (en) * | 2013-06-17 | 2013-09-25 | 华南理工大学 | Strengthened boiling heat transfer testing device and testing method |
| CN203688480U (en) * | 2014-01-08 | 2014-07-02 | 天津大学 | Quick release test device for measuring high-heat-flux heat transmission process |
| CN204028026U (en) * | 2014-09-03 | 2014-12-17 | 大连海事大学 | A kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer |
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2014
- 2014-09-03 CN CN201410450374.3A patent/CN104198526A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0815189A (en) * | 1994-06-30 | 1996-01-19 | Kyoto Electron Mfg Co Ltd | Method and apparatus for measuring thermal resistance |
| CN101871902A (en) * | 2010-05-24 | 2010-10-27 | 北京科技大学 | Test device and test method for limit heat-flow density of porous material for heat pipe |
| CN103323488A (en) * | 2013-06-17 | 2013-09-25 | 华南理工大学 | Strengthened boiling heat transfer testing device and testing method |
| CN203688480U (en) * | 2014-01-08 | 2014-07-02 | 天津大学 | Quick release test device for measuring high-heat-flux heat transmission process |
| CN204028026U (en) * | 2014-09-03 | 2014-12-17 | 大连海事大学 | A kind of experimental provision of studying the impact of heat exchange surface flow boiling heat transfer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828006A (en) * | 2018-06-27 | 2018-11-16 | 西安交通大学 | A kind of flowing of micro-channel heat exchanger and phase-change heat transfer experiment test platform and operating method |
| CN110044953A (en) * | 2019-03-26 | 2019-07-23 | 南京航空航天大学 | Boiling crisis Heat Flow Experiment device is flowed under a kind of hypergravity |
| CN110044953B (en) * | 2019-03-26 | 2021-10-29 | 南京航空航天大学 | Experimental device for boiling critical heat flow under supergravity |
| CN114002262A (en) * | 2021-11-03 | 2022-02-01 | 重庆大学 | Four-side visible pressurized flow boiling experimental device |
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