CN201222041Y - Apparatus for measuring forced convection heat-exchange coefficient in fluid tube - Google Patents
Apparatus for measuring forced convection heat-exchange coefficient in fluid tube Download PDFInfo
- Publication number
- CN201222041Y CN201222041Y CNU200820081288XU CN200820081288U CN201222041Y CN 201222041 Y CN201222041 Y CN 201222041Y CN U200820081288X U CNU200820081288X U CN U200820081288XU CN 200820081288 U CN200820081288 U CN 200820081288U CN 201222041 Y CN201222041 Y CN 201222041Y
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- Prior art keywords
- working medium
- cooling
- heat transfer
- transfer coefficient
- electric heater
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- Expired - Fee Related
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- 239000012530 fluid Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000012360 testing method Methods 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 34
- 238000012546 transfer Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 28
- 239000008399 tap water Substances 0.000 claims description 6
- 235000020679 tap water Nutrition 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 4
- 238000009835 boiling Methods 0.000 abstract description 9
- 238000009833 condensation Methods 0.000 abstract description 8
- 230000005494 condensation Effects 0.000 abstract description 8
- 239000007791 liquid phase Substances 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000005514 two-phase flow Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model relates to a device for measuring heat transfer coefficient of forced convection in fluid pipelines, in particular to an experimental device capable of measuring heat transfer coefficient of heating and cooling forced convection in working medium pipes, which mainly comprises a working medium circulation loop, a cooled water loop and a hot water loop, wherein the working medium circulation loop is connected with the cooled water loop and the hot water loop respectively via a heat exchanging component, both the heating and cooling detected segments of the working medium loop are equipped with a bypass throttle valve loop, and an electric heater is arranged in the front of the heating-test detected segment. The utility model can measure heating and cooling convection heat transfer in the working medium pipe simultaneously, wherein mass flow rate of working medium can be randomly adjusted in a wide range, and further, the utility model can measure heat transfer coefficient of convectional boiling and condensation of gas-liquid phase flow in a wide variation range of dryness.
Description
Technical field
The utility model relates to a kind of device of measuring forced-convection heat transfer coefficient in the fluid hose, especially can belong to the pick-up unit field of energy utilization simultaneously to the experimental provision of heating and cooling convection transfer rate mensuration in the working medium tube.
Background technology
Utilize the field at freeze (or heat pump) field and employing organic Rankine round-robin low temperature heat energy, select the superior cycle fluid of a kind of thermal performance to have crucial meaning.But the power circulation system overall performance also is subjected to the influence of refrigerant heat transfer characteristic and resistance to flow.Therefore, measure that convection heat transfer is the important step of new working medium research and development in the pipe of new working medium.At present, in the world to the experimental provision of tube fluid forced-convection heat transfer, can only measure cooling or heating in the pipe mostly separately, can't measure heating and cooling convection heat transfer in the pipe simultaneously, and the variation range of the mass flowrate of intraductal working medium is also narrow, flow boiling or when condensing in testing tube, the mass dryness fraction variation range of stream-liquid two-phase flow is also narrow, these all can influence the correct understanding to fluid interchange rule in the working medium tube, also directly have influence on the usable range and the precision of prediction of convection transfer rate experiment recurrence correlation in the working medium tube.Therefore, being necessary to design a kind of can mensuration simultaneously heats in the working medium tube and the cooling convection heat transfer, the working medium mass flowrate is adjustable arbitrarily in a big way, also can measure the convective boiling of stream-liquid two-phase flow and the experimental provision of condensation heat transfer in big mass dryness fraction variation range.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of experimental provision of measuring forced-convection heat transfer coefficient in the fluid hose, can measure heating and cooling convection heat transfer in the working medium tube simultaneously, the working medium mass flowrate is adjustable arbitrarily in a big way, also can measure the convective boiling and the condensation heat transfer coefficient of stream-liquid two-phase flow in big mass dryness fraction variation range.
The technical scheme that its technical matters that solves the utility model adopts is:
This experiment test device comprises three loops: 1) working medium closed circuit, 2) chilled(cooling) water return (CWR), 3) the hot water heating circuit.The working medium closed circuit is connected with hot-water return with the chilled(cooling) water return (CWR) respectively by heat exchange component; In the heating of working medium closed circuit and cool off two test detection segment and all be provided with bypass throttling valve loop, and be provided with electric heater before the heat test detection segment.
Concrete structure of the present utility model is as follows: be provided with precooler before the cooling test detection segment, be provided with recooler after the cooling test detection segment; Be provided with frozen water storage bin and tap water in the chilled(cooling) water return (CWR) and store water tank, this pipeline of two casees connects threeway mixing variable valve; Be provided with the duct type electric heater in the hot-water return.
The precooler of cooling test detection segment and recooler all adopt the plate type heat exchanger structure; The electric heater of working medium closed circuit adopts the conduction oil electric heater that has disposed AC voltage regulator, and the pipeline in the electric heater is a spiral pipe; The duct type electric heater of hot-water return has also disposed AC voltage regulator.
The heating and cool off two the test detection segment all adopt the double-pipe exchange structure, a series of detection sensing elements are along the axial setting of sleeve pipe.
The hot and cold water pipe in each loop and test detection segment all are wrapped with the foamed rubber-plastic material; The working medium closed circuit is provided with buffer tank.
Above equipment, accessory and test instrumentation connect with copper pipe by figure.To charging into working medium to be measured when detecting, change the hot water supply and return water temperature of electric heater in the heat test detection segment by AC voltage regulator, change in the working medium closed circuit state (liquid of working medium in the working medium heater heats section by AC voltage regulator, two-phase, vapour) and the boiling two-phase fluid mass dryness fraction, change the mass dryness fraction of condensation heat transfer working medium in the cooling test section by the by-pass valve aperture of adjusting precooler in the chilled(cooling) water return (CWR), change the temperature of chilled water by the adjustment frozen water and the threeway mixing variable valve of tap water, by regulating the throttling valve loop valve opening in the working medium closed circuit, can change by heating and cool off the working medium flow of two test sections.Each thermocouple temperature sensor and each fluid working substance data on flows are gathered and are handled by the HP3470 automatic data acquisition system, thereby can realize measuring simultaneously heating and cooling convection transfer rate in the working medium tube more easily, it is adjustable arbitrarily in a big way also can to satisfy the working medium mass flowrate, also can measure the convective boiling of stream-liquid two-phase flow and the requirement of condensation heat transfer coefficient in big mass dryness fraction variation range.
The beneficial effects of the utility model are:
Can realize mensuration simultaneously to heating and cooling convection transfer rate in the working medium tube; Can in a big way, change the mass flowrate of working medium arbitrarily, thereby measure the convection transfer rate of working medium under the different quality flow rate; When measuring boiling and condensation heat transfer coefficient, can in a big way, change the mass dryness fraction of two-phase flow in the test section, thereby measure boiling and the condensation heat transfer coefficient of working medium under different mass dryness fractions; Use frozen water to mix as chilled water by the temperature control three-way control valve, can stablize the temperature of chilled water preferably, under the situation of ice outsourcing, can save the initial cost of cooling circulating water refrigeration system greatly with tap water.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the utility model bushing type heating (cooling) test detection segment synoptic diagram;
Fig. 3 is a working medium heater structure synoptic diagram of the present utility model.
Sequence number is represented among each figure: working medium force (forcing) pump 1, working medium buffer tank 2, needle regulator and variable valve 3, bypass flow regulator 4, working medium well heater 5, heat test detection segment 6, working medium mass flowmeter 7, reduction valve and by-pass valve 8, plate type heat exchanger precooler 9, cooling test detection segment 10, all press buffer tank 11, plate type heat exchanger recooler 12, working medium fluid reservoir 13,14 working medium fill valve, frozen water storage bin 15, tap water stores water tank 16, threeway mixing variable valve 17, cold water circulation pump 18, chilled water bypass flow regulator 19, chilled water quality flowmeter 20, hot water quality's flowmeter 21, hot water circulating pump 22, bypass flow regulator 23, duct type electric heater 24, working medium inlet 6-1, inner sleeve 6-2, outer tube 6-3, detect sensing element 6-4, hot water inlet 6-5, sender property outlet 6-6, hot water outlet 6-7, working medium inlet 5-1, oil bath bucket 5-2, spiral pipe 5-3, valve 5-4, support 5-5, electrothermal tube 5-6, sender property outlet 5-7.
Embodiment
Referring to each figure, this device comprises three loops: working medium closed circuit C, chilled(cooling) water return (CWR) B and hot water heating circuit A.Working medium closed circuit C is connected with hot water heating circuit A heat interchange by heat test detection segment 6; Be connected with chilled(cooling) water return (CWR) B heat interchange by plate type heat exchanger precooler 9, cooling test detection segment 10 and plate type heat exchanger recooler 12.In the working medium closed circuit, be provided with reduction valve and by-pass valve 8, needle regulator and variable valve 3, be used for changing by heating and cool off the working medium flow of two test sections, the working medium well heater 5 of working medium closed circuit adopts the conduction oil electric heater that has disposed AC voltage regulator, and the pipeline that working medium flows through in the electric heater is a spiral pipe 5-3 (see figure 3), also is provided with the working medium buffer tank 2 that keeps power pressure on the working medium closed circuit.Be provided with frozen water storage bin 15 and tap water among the B of chilled(cooling) water return (CWR) and store water tank 16, this pipeline of two casees adopts threeway mixing variable valve 17 to connect, thereby both can stablize chilling temperature, can save cost of equipment again, before cooling test detection segment 10, be provided with plate type heat exchanger precooler 9, after the cooling test detection segment, then be provided with plate type heat exchanger recooler 12.Be provided with duct type electric heater 24 among the hot-water return A, and the duct type electric heater also disposed AC voltage regulator, so that adjust the temperature of hot water flexibly.See Fig. 2, heat and cool off two test detection segment 6,10 double-pipe exchange structure all that a series of detection sensing element 6-4 are along the axial setting of sleeve pipe.For fear of hot transmission loss, hot and cold water pipe and test detection segment in each loop all are wrapped with the foamed rubber-plastic material.
Detect example: measure R290 (C
3H
8Propane) boiling heat transfer coefficient of (saturation pressure PS=2.585MPa) in the time of 70 ℃, measure its condensation heat transfer coefficient when 25 ℃ (saturation pressure PS=0.953MPa) simultaneously, as shown in the figure, the range of selected working medium mass flowmeter 7 is 10～100kg/h, the inner sleeve 6-2 of heat test detection segment 6 is copper pipe Φ 8 * 1.5, outer tube 6-3 is Φ 25 * 1.5, the working medium circulation line connects with Φ 16 * 1.5 copper pipes, copper pipe fitting adopts expand tube to insert the weldering connection, with instrument, accessory and equipment place connect with pipe fitting, duct type electric heater 24 is selected the 3Kw heating power for use, it is 120kg/h that working medium force (forcing) pump 1 is selected flow for use, discharge pressure is the volume pump of 3MPa, import and export at pump are provided with the corrugated stainless steel tubing vibration damping, the power of working medium well heater 5 is 2Kw, adopt two 10Kw AC voltage regulator to adjust the power input of hot water and working medium well heater, working medium buffer tank 2 and working medium fluid reservoir 13 all adopt stainless steel to press pressure-bearing 3.0MPa pressure vessel and make, hot water circulating pump 22 and cooling water circulating pump 18 are all selected in-line pump for use, and flow is 1.5m
3/ h, lift is 12 meter water columns, the working medium valve all adopts cooling high pressure resistant copper valve, the cold cycling water pipe adopts solid drawn tube Φ 20 * 2 welding, hot water pipe and two test specimens all adopt the foamed rubber-plastic insulation of thick 30mm, adopt the 0.2mm copper-constantan thermocouple as temperature-sensing element, all sensing elements are installed in the test section relevant position on request, working medium pipeline, cold water pipeline, hot water line press Fig. 1 and install, after the installation pipe system is hunted leak, vacuumized, charge into R290, just can carry out test job it.
Claims (5)
1, a kind of device of measuring forced-convection heat transfer coefficient in the fluid hose, it is characterized in that: mainly be made up of working medium closed circuit, chilled(cooling) water return (CWR) and hot-water return, the working medium closed circuit is connected with hot-water return with the chilled(cooling) water return (CWR) respectively by heat exchange component; In the heating of working medium closed circuit and cool off two test detection segment and all be provided with bypass throttling valve loop, and be provided with electric heater before the heat test detection segment.
2, by the device of forced-convection heat transfer coefficient in the described measurement fluid hose of claim 1, it is characterized in that: before the cooling test detection segment, precooler is set, after the cooling test detection segment, recooler is set; Be provided with frozen water storage bin and tap water in the chilled(cooling) water return (CWR) and store water tank, this pipeline of two casees connects threeway mixing variable valve; Be provided with the duct type electric heater in the hot-water return.
3, by the device of forced-convection heat transfer coefficient in the described measurement fluid hose of claim 2, it is characterized in that: the precooler of cooling test detection segment and recooler all adopt the plate type heat exchanger structure; The electric heater of working medium closed circuit adopts the conduction oil electric heater that has disposed AC voltage regulator, and the pipeline in the electric heater is a spiral pipe; The duct type electric heater of hot-water return has also disposed AC voltage regulator.
4, by the device of forced-convection heat transfer coefficient in the described measurement fluid hose of claim 2, it is characterized in that: heat and cool off two test detection segment and all adopt the double-pipe exchange structure, a series of detection sensing elements are along the axial setting of sleeve pipe.
5, by the device of forced-convection heat transfer coefficient in the described measurement fluid hose of claim 4, it is characterized in that: the hot and cold water pipe in each loop and test detection segment all are wrapped with the foamed rubber-plastic material; The working medium closed circuit is provided with buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820081288XU CN201222041Y (en) | 2008-06-02 | 2008-06-02 | Apparatus for measuring forced convection heat-exchange coefficient in fluid tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820081288XU CN201222041Y (en) | 2008-06-02 | 2008-06-02 | Apparatus for measuring forced convection heat-exchange coefficient in fluid tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222041Y true CN201222041Y (en) | 2009-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820081288XU Expired - Fee Related CN201222041Y (en) | 2008-06-02 | 2008-06-02 | Apparatus for measuring forced convection heat-exchange coefficient in fluid tube |
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| Country | Link |
|---|---|
| CN (1) | CN201222041Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081060A (en) * | 2010-12-14 | 2011-06-01 | 哈尔滨工程大学 | Multifunctional wide flow single-phase convective heat exchange test device |
| CN103604827A (en) * | 2013-11-15 | 2014-02-26 | 四川大学 | Ice water heat exchange coefficient experimental apparatus and measurement method |
| CN104297291A (en) * | 2014-11-10 | 2015-01-21 | 东南大学 | Experimental device for measuring pipe flow boiling heat transfer coefficient of refrigerant |
| CN104502392A (en) * | 2014-12-02 | 2015-04-08 | 北京空间飞行器总体设计部 | Two-phase fluid loop freezing failure test method |
| CN104966536A (en) * | 2015-07-14 | 2015-10-07 | 西安交通大学 | High-temperature working medium heat exchange test system using heat conducting oil as hot fluid and test method |
| CN105716896A (en) * | 2016-04-21 | 2016-06-29 | 甘肃蓝科石化高新装备股份有限公司 | Process unit capable of improving operation flexibility of boiling flow heat transfer experiment and implementation method thereof |
| CN106332322A (en) * | 2016-08-26 | 2017-01-11 | 上海理工大学 | Fixed outlet temperature and pressure type flooded heater |
| CN106645276A (en) * | 2016-09-30 | 2017-05-10 | 西安工程大学 | Device and method for measuring local heat transfer coefficient of surface of ice column of iced conductor |
| CN107238627A (en) * | 2017-05-31 | 2017-10-10 | 中国科学院上海应用物理研究所 | Conduction oil working medium forced circulation Comprehensive Experiment circuit system |
| CN107664653A (en) * | 2017-10-30 | 2018-02-06 | 南京工业大学 | Heat exchanger condensation heat transfer experiment test platform and method of testing |
| CN110057863A (en) * | 2019-05-07 | 2019-07-26 | 西安交通大学 | A kind of high-temperature high-flow rate gas fluid interchange experimental provision and experimental method |
| CN117250226A (en) * | 2023-11-13 | 2023-12-19 | 甘肃蓝科石化高新装备股份有限公司 | Plate type heat transfer element working medium internal circulation small temperature difference phase change thermal test platform |
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2008
- 2008-06-02 CN CNU200820081288XU patent/CN201222041Y/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081060B (en) * | 2010-12-14 | 2012-07-11 | 哈尔滨工程大学 | Multifunctional wide flow single-phase convective heat exchange test device |
| CN102081060A (en) * | 2010-12-14 | 2011-06-01 | 哈尔滨工程大学 | Multifunctional wide flow single-phase convective heat exchange test device |
| CN103604827A (en) * | 2013-11-15 | 2014-02-26 | 四川大学 | Ice water heat exchange coefficient experimental apparatus and measurement method |
| CN104297291A (en) * | 2014-11-10 | 2015-01-21 | 东南大学 | Experimental device for measuring pipe flow boiling heat transfer coefficient of refrigerant |
| CN104297291B (en) * | 2014-11-10 | 2016-09-14 | 东南大学 | A kind of measure the experimental provision of flow boiling and heat transfer coefficient in refrigerant pipe |
| CN104502392A (en) * | 2014-12-02 | 2015-04-08 | 北京空间飞行器总体设计部 | Two-phase fluid loop freezing failure test method |
| CN104966536B (en) * | 2015-07-14 | 2017-06-20 | 西安交通大学 | A kind of high temperature refrigerant heat transfer experiments system and method with conduction oil as hot fluid |
| CN104966536A (en) * | 2015-07-14 | 2015-10-07 | 西安交通大学 | High-temperature working medium heat exchange test system using heat conducting oil as hot fluid and test method |
| CN105716896A (en) * | 2016-04-21 | 2016-06-29 | 甘肃蓝科石化高新装备股份有限公司 | Process unit capable of improving operation flexibility of boiling flow heat transfer experiment and implementation method thereof |
| CN106332322A (en) * | 2016-08-26 | 2017-01-11 | 上海理工大学 | Fixed outlet temperature and pressure type flooded heater |
| CN106332322B (en) * | 2016-08-26 | 2019-04-16 | 上海理工大学 | Determine outlet temperature, pressure-type full-liquid type heater |
| CN106645276A (en) * | 2016-09-30 | 2017-05-10 | 西安工程大学 | Device and method for measuring local heat transfer coefficient of surface of ice column of iced conductor |
| CN106645276B (en) * | 2016-09-30 | 2019-06-21 | 西安工程大学 | A kind of measurement method of ice coating wire icicle surface Local Condensing Heat Transfer Coefficients |
| CN107238627A (en) * | 2017-05-31 | 2017-10-10 | 中国科学院上海应用物理研究所 | Conduction oil working medium forced circulation Comprehensive Experiment circuit system |
| CN107238627B (en) * | 2017-05-31 | 2020-03-27 | 中国科学院上海应用物理研究所 | Comprehensive experiment loop system for forced circulation of heat conduction oil working medium |
| CN107664653A (en) * | 2017-10-30 | 2018-02-06 | 南京工业大学 | Heat exchanger condensation heat transfer experiment test platform and method of testing |
| CN110057863A (en) * | 2019-05-07 | 2019-07-26 | 西安交通大学 | A kind of high-temperature high-flow rate gas fluid interchange experimental provision and experimental method |
| CN117250226A (en) * | 2023-11-13 | 2023-12-19 | 甘肃蓝科石化高新装备股份有限公司 | Plate type heat transfer element working medium internal circulation small temperature difference phase change thermal test platform |
| CN117250226B (en) * | 2023-11-13 | 2024-01-26 | 甘肃蓝科石化高新装备股份有限公司 | Plate type heat transfer element working medium internal circulation small temperature difference phase change thermal test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20110602 |