CN101788510B - Fluid tube internal heat exchange coefficient measuring device provided with condensing pressure adjusting module - Google Patents
Fluid tube internal heat exchange coefficient measuring device provided with condensing pressure adjusting module Download PDFInfo
- Publication number
- CN101788510B CN101788510B CN2010101047149A CN201010104714A CN101788510B CN 101788510 B CN101788510 B CN 101788510B CN 2010101047149 A CN2010101047149 A CN 2010101047149A CN 201010104714 A CN201010104714 A CN 201010104714A CN 101788510 B CN101788510 B CN 101788510B
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- China
- Prior art keywords
- fluid
- condensing pressure
- adjusting module
- pressure adjusting
- fluid container
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- 239000012530 fluid Substances 0.000 title claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 abstract description 8
- 230000005494 condensation Effects 0.000 abstract description 8
- 238000012546 transfer Methods 0.000 description 12
- 238000009434 installation Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001006 Constantan Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a fluid tube internal heat exchange coefficient measuring device provided with a condensing pressure adjusting module, consisting of a fluid circulating loop and the condensing pressure adjusting module, wherein the fluid circulating loop comprises a precooler, a test detecting section, a subcooler, a drying filter, a circulating pump, a flow meter, a heater and a first valve which are connected in sequence; the condensing pressure adjusting module comprises a fluid container provided with a liquid level meter; one end of the fluid container is provided with a liquid filling hole, and the other end thereof returns to the middle part between the drying filter and the subcooler of the fluid circulating loop by a pipeline; and a constant temperature groove is positioned outside the fluid container. The device uses the condensing pressure adjusting module to lead the system condensing pressure to be freely adjusted within a larger range, thus measuring the condensation heat exchange coefficient of fluid under the different condensing pressures. Furthermore, the device has high control accuracy for the fluid condensing pressure and good stability.
Description
Technical field
The present invention relates to condensation heat transfer coefficient proving installation in a kind of pipe; Regulate and the intrasystem condensing pressure of steady testing through pressure adjusting module; The pick-up unit field that belongs to energy utilization, this device are particularly useful for the interior condensation heat transfer coefficient test of pipe of refrigeration working medium.
Background technology
The destruction of ozonosphere and Global climate change; It is the main Environmental Problems that the world today faces; In the Refrigeration & Air-Conditioning field; Various countries carry out the research of seeking substitute in succession, and desirable alternative working medium should be environmentally friendly, also should have good experiment safety property, economy and good thermophysical property etc.Condensation heat transfer is a very important heat transfer process in refrigeration, air-conditioning equipment and other the many commercial units in the pipe, and the heat exchange property of working medium and equipment room is directly connected to the economy and the reliability of equipment.Therefore, develop a kind of alternative working medium, need do system and careful research the intraductal heat transfer performance of new working medium.At present; In the experimental provision to the tube fluid condensation heat transfer, when fluid flowed in testing tube, the variation range of condensing pressure was narrow; Pressure controling precision is low; Poor stability, the correct understanding that this will influence flowing law in the fluid pipe also has influence on usable range and precision of prediction that the interior condensation heat transfer coefficient experiment of fluid hose returns correlation.Therefore, be necessary to design a kind of can mensuration and cool off convection heat transfer in the pipe, the fluid condensing pressure is adjustable arbitrarily in a big way, pressure controling precision is high, and the experimental provision of good stability.
Summary of the invention
The present invention provides a kind of fluid tube internal heat exchange coefficient measuring device that has condensing pressure adjusting module, can interior in a big way accurately control and regulating system condensing pressure.
A kind of fluid tube internal heat exchange coefficient measuring device that has condensing pressure adjusting module is made up of fluid circulation loop and condensing pressure adjusting module, and precooler, test detection segment, subcooler, device for drying and filtering, ebullator, flowmeter, well heater are connected with first valve successively in the described fluid circulation loop; Described condensing pressure adjusting module comprises fluid container and the outer calibration cell of fluid container of being with liquid level gauge, and fluid container top is provided with implementation of port, and the bottom is through between the device for drying and filtering and subcooler of pipeline Returning fluid closed circuit.
The pipeline of fluid container Returning fluid closed circuit is provided with second valve, so that the pipeline of condensing pressure adjusting module and fluid circulation loop is connected, guarantees that simultaneously the detected fluid of pump entry is in liquid phase all the time.
Described test detection segment parcel insulation material can be avoided hot transmission loss.
In the course of the work, full of liquid in the calibration cell, fluid container is immersed in the liquid of calibration cell.In fluid container, fill measured liquid through implementation of port, have half container volume to be in liquid condition all the time according to appointment, and when operation can observe the liquid level in the fluid container through liquid level gauge, guarantee that the liquid of fluid container is in gas-liquid two-phase all the time.When the calibration cell temperature raise, the hold-up pressure in the fluid container raise, and measured liquid is pressed into closed circuit in fluid container, and the liquid level of liquid level gauge reduces, thereby the condensing pressure of pilot system raises; On the contrary, when the calibration cell temperature reduced, the hold-up pressure in the fluid container reduced, and measured liquid is from closed circuit Returning fluid container, and the liquid level of liquid level gauge increases, and the condensing pressure of pilot system reduces.At the trial; When required condensing pressure reaches, the temperature of calibration cell will keep stablizing constant, because the access of condensing pressure adjusting module; No matter how the temperature and the mass dryness fraction of measured liquid changes in the closed circuit, and the condensing pressure in the coefficient of heat transfer proving installation will remain constant.Through the temperature of accurate adjusting and control calibration cell, and the temperature control scope of choose reasonable calibration cell, can interior in a big way accurately control and regulating system condensing pressure.
The beneficial effect that the present invention has: device is through condensing pressure adjusting module, and system condensing pressure can be adjustable arbitrarily in a big way, thereby measures the condensation heat transfer coefficient of fluid under different condensing pressures; Fluid condensing pressure control accuracy is high, and good stability.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the condensing pressure adjusting module structural representation.
Embodiment
Like Fig. 1, shown in Figure 2, apparatus of the present invention are made up of fluid circulation loop and condensing pressure adjusting module 4.Precooler 1, test detection segment 2, subcooler 3, device for drying and filtering 5, ebullator 6, flowmeter 7, well heater 8 are connected with first valve 9 successively in the fluid circulation loop; Condensing pressure adjusting module 4 comprises the fluid container 42 of being with liquid level gauge 44, and fluid container 42 1 ends are provided with implementation of port 43, and the other end is through between the device for drying and filtering 5 and subcooler 3 of pipeline Returning fluid closed circuit, and fluid container 42 peripheral hardwares have calibration cell 41.The pipeline of fluid container 42 Returning fluid closed circuits is provided with second valve 45.
For fear of hot transmission loss, test detection segment 2 is enclosed with insulation material.
In the course of the work, full of liquid in the calibration cell 41, fluid container 42 is immersed in the liquid of calibration cell 41.In fluid container 42, fill measured liquid through implementation of port 43, dash to the half the approximately volume place of fluid container 42.Can guarantee that the liquid of fluid container 42 is in gas-liquid two-phase all the time through the liquid level in the liquid level gauge 44 observation fluid containers 42 during operation.When calibration cell 41 temperature raise, the measured hold-up pressure in the fluid container 42 raise, and measured liquid is pressed into closed circuit in fluid container 42, and the liquid level of liquid level gauge 44 reduces, thereby the condensing pressure of pilot system raises; On the contrary; When calibration cell 41 temperature reduced, the measured hold-up pressure in the fluid container 42 reduced, and measured liquid is from the fluid container 42 of the return condensed pressure adjusting module 4 of closed circuit; The liquid level of liquid level gauge 44 increases, and the condensing pressure of pilot system reduces.At the trial; When required condensing pressure reaches, the temperature of calibration cell 41 will keep stablizing constant, because the access of condensing pressure adjusting module 4; No matter how the temperature and the mass dryness fraction of fluid changes in the closed circuit, and the condensing pressure in the coefficient of heat transfer proving installation will remain constant.Through the temperature of accurate adjusting and control calibration cell 41, and the temperature control scope of choose reasonable calibration cell 41, inner control and regulating system condensing pressure in a big way.The control accuracy of fluid condensing pressure is high in the closed circuit, range of adjustment is wide, and good stability.
Application examples: measure R600a (isobutane, molecular formula CH (CH
3)
3) (saturation temperature T when condensing pressure is 1.0867Mpa
s=70 ℃) pipe in condensation heat transfer coefficient.As shown in the figure; The range of selecting working medium mass flowmeter 7 for use is 10-100kg/h, and test detection segment 2 is the copper pipe of Φ 8 * 1.5, adopts the foamed rubber-plastic insulation of thick 30mm; The range of pressure transducer is 0-3.5Mpa, adopts Φ 0.2mm copper-constantan thermocouple as temperature-sensing element.The working medium circulation line adopts the copper pipe of Φ 8 * 1.5 to connect, and copper pipe fitting adopts expand tube to insert and welds and connects.Working medium circulating pump 6 adopts canned motor pump, and the fluid container 42 in the condensing pressure adjusting module 4 adopts stainless steel pressure-bearing 4.0Mpa to require to make, and by after the figure installation pipe system being hunted leak, vacuumized, charges into R600a, just can carry out test job.
Claims (2)
1. fluid tube internal heat exchange coefficient measuring device that has condensing pressure adjusting module; It is characterized in that: be made up of fluid circulation loop and condensing pressure adjusting module (4), precooler in the described fluid circulation loop (1), test detection segment (2), subcooler (3), device for drying and filtering (5), ebullator (6), flowmeter (7), well heater (8) are connected with first valve (9) successively; Described test detection segment (2) is enclosed with insulation material; Described condensing pressure adjusting module (4) comprises the fluid container (42) and the outer calibration cell (41) of fluid container (42) of band liquid level gauge (44); Fluid container (42) top is provided with implementation of port (43), and the bottom is through between the device for drying and filtering (5) and subcooler (3) of pipeline Returning fluid closed circuit.
2. fluid tube internal heat exchange coefficient measuring device as claimed in claim 1 is characterised in that: the pipeline of fluid container (42) Returning fluid closed circuit is provided with second valve (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101047149A CN101788510B (en) | 2010-01-29 | 2010-01-29 | Fluid tube internal heat exchange coefficient measuring device provided with condensing pressure adjusting module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101047149A CN101788510B (en) | 2010-01-29 | 2010-01-29 | Fluid tube internal heat exchange coefficient measuring device provided with condensing pressure adjusting module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101788510A CN101788510A (en) | 2010-07-28 |
| CN101788510B true CN101788510B (en) | 2012-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101047149A Expired - Fee Related CN101788510B (en) | 2010-01-29 | 2010-01-29 | Fluid tube internal heat exchange coefficient measuring device provided with condensing pressure adjusting module |
Country Status (1)
| Country | Link |
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| CN (1) | CN101788510B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102691850A (en) * | 2012-05-30 | 2012-09-26 | 张秀英 | Volume regulator for closed fluid circulation loop |
| CN103728334A (en) * | 2013-12-30 | 2014-04-16 | 国核华清（北京）核电技术研发中心有限公司 | Bearing test device for simulating wall-surface condensation phenomenon |
| CN106248461A (en) * | 2016-07-21 | 2016-12-21 | 深圳市美雅洁技术股份有限公司 | A kind of ultrasound wave rapid dewatering system for pathological tissue and using method |
| CN110596186A (en) * | 2019-10-23 | 2019-12-20 | 上海海洋大学 | Switchable evaporation and condensation single-tube heat exchange experimental device |
-
2010
- 2010-01-29 CN CN2010101047149A patent/CN101788510B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| JP特开2002-122371A 2002.04.26 |
| 李慧君.滴形管凝结换热性能的实验研究.《中国电机工程学报》.2009,第29 卷(第20 期),79-84. * |
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| Publication number | Publication date |
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| CN101788510A (en) | 2010-07-28 |
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