CN104865003A - Integration liquid saturated vapor pressure and vaporization latent heat combined test system - Google Patents
Integration liquid saturated vapor pressure and vaporization latent heat combined test system Download PDFInfo
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Abstract
The invention discloses an integration liquid saturated vapor pressure and vaporization latent heat combined test system comprising a liquid pool system, an air exhaust system, a temperature control system, a heating condensation system and a measuring system; the liquid pool system comprises a reaction container and a working medium liquid storage ball; the air exhaust system comprises a compound vacuum gauge and a vacuum pump; the temperature control system comprises a compressor, an evaporator, a motor, a stirrer, a heating pipe, a pressure regulator and a constant temperature water bath; the heating condensation system comprises a refrigerant liquid storage ball, a cold liquid pump, a power meter, an adjustable DC regulated power supply, a condenser and a heating sheet; the measuring system comprises a pressure sensor, a weighing device, a data acquisition recorder and a temperature sensor. The test system can carry out combined measurement for the liquid saturated vapor pressure and vaporization latent heat, is stable in pressure control, strong in temperature control capability, high in integration, simple in operation, thus greatly reducing experiment errors, improving experiment accuracy, and enhancing system testing functions.
Description
Technical field
The present invention relates to a kind of hold-up vapour pressure test macro, particularly relate to a kind of integrated hold-up vapour pressure and latent heat of vaporization combined test system.
Background technology
Liquid-gas phase transition is a kind of states of matter change of occurring in nature, all relates to liquid-gas phase transition process, and the feature of liquid-gas phase transition can be utilized to carry out separation and the heat transfer of material at many engineering fields such as chemical industry, energy source and power.In recent years, along with the fast development of material science, various novel working medium continues to bring out, and the data of relevant rudimentary thermophysical property extremely lack, and constrain application and the development of Biological process.Saturated vapor pressure refers at a certain temperature, the pressure showed by steam when liquid gasification speed i.e. liquids and gases equal to condensation of gas speed reach equilibrium state in closed container, is the indispensable basic data of liquid working substance development & application.Certain saturated vapour pressure, the heat that saturated liquid becomes required for saturated gas is called the latent heat of vaporization.Compare the sensible heat that single-phase liquid or gaseous working medium temperature variation absorb or discharge, the latent heat of vaporization is much larger than the sensible heat of Single-phase medium.Therefore, utilize the latent heat of vaporization of working medium to carry out heat transmission and greatly can improve heat exchanger effectiveness in commercial production, and then enhance productivity.In addition, accurately and production control temperature industrially carries out diabatic process sustainedly and stably time be very difficult, and the liquid-gas phase transition occurred under certain temperature and pressure can solve this difficult point.In a word, saturated vapor pressure and the latent heat of vaporization are the key parameters in liquid-gas phase transition process.Saturated vapor pressure and the latent heat of vaporization are not only relevant with liquid working substance kind, also have important relation with conditions such as temperature.At present, extremely lack about various Biological process saturated vapor pressure and latent heat of vaporization data, how Obtaining Accurate relevant test data needs urgently to be resolved hurrily.
Static method is the method for mensuration Liquid saturated vapor comparatively general at present, based on static method traditional liquid saturated vapour pressure measuring device as shown in Figure 1, form primarily of water bath 1, balance pipe 2, surge flask 3, suction bottle 4, first T-valve 5, second T-valve 6, the 3rd T-valve 8, thermometer 7, condenser pipe 9, stirring rod 10 and pressure gauge 11, this measurement mechanism can directly measure ullage vapor pressure, it is less that error of measured data compares additive method, and be applicable to the measurement of the larger liquid working substance saturated vapor pressure of temperature range.But there is following defect in this measurement mechanism:
First, balance pipe operating difficulties: original balance pipe is when adding testing sample, need a small amount of through repeatedly adding, liquid can not enter liquid storage ball automatically, needs to enter liquid storage ball to make testing sample, because balance pipe caliber is thin by carrying out heating cooling processing to liquid storage ball, can cause that inner air tube is more difficult to be drained, determination data out of true, easily causes working medium suck-back simultaneously, causes the failure of an experiment; In addition, clean balance pipe and also there is very large difficulty.
The second, pressure system controls difficulty: the gas pressure measurement above liquid need carry out under high vacuum condition, if residual impurities gas above liquid, Liquid saturated vapor measured value will be made to produce relatively large deviation, thus have higher requirements to the leakproofness of device; Typical measuring arrangements each joint leakproofness is poor, is difficult to air to drain; In addition, use T-valve to carry out gas circuit control, less stable, when Stress control instability causes level balance, compole is short, and during often there is reading, liquid level just changes, thus causes measuring error.
3rd, temperature control capacity is more weak: the constant temperature water bath of typical measuring arrangements due to structure too simple, thermal uniformity is poor, and working method is one-way heating, and the cooling effectiveness of Temperature fall is lower; Thermometric adopts thermometer naked eyes reading mode, and error is larger.
4th, each component spread of measurement mechanism, bulky, all need to take off each junction during each experiment and carry out encapsulation process, complex operation, leakproofness is poor.
5th, measurement mechanism lacks latent heat of vaporization test component, only can measure hold-up vapour pressure, the latent heat of vaporization can not be measured simultaneously, test function is single, make hold-up vapour pressure and the latent heat of vaporization often each leisure independently measuring table is measured, economy and time cost are all higher.
Summary of the invention
Object of the present invention is just to provide to solve the problem the integrated hold-up vapour pressure and latent heat of vaporization combined test system that a kind of measuring accuracy is high, processing cost is low.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of integrated hold-up vapour pressure and latent heat of vaporization combined test system, comprise liquid pool system, extract system, temperature control system, heating-condensing system and measuring system, described liquid pool system comprises reaction vessel and working medium liquid storing ball, described extract system comprises compound type vacuum meter and vacuum pump, described temperature control system comprises compressor, evaporator, motor, stirrer, heating tube, pressure regulator and constant temperature water bath, described heating-condensing system comprises refrigerant liquid storing ball, condenser pump, power measurement instrument, adjustable D. C regulated, condenser and heating plate, described measuring system comprises pressure transducer, weighing instrument, data acquisition recorder and temperature sensor, described evaporator, described stirrer, described heating tube and described temperature sensor are all placed in described constant temperature water bath with the described reaction vessel closed, described compressor is connected with described evaporator and for lowering the temperature, described motor is connected with described stirrer and for stirring, described pressure regulator is connected with described heating tube and for heating, described working medium liquid storing ball and described reaction vessel are connected and its connecting pipe are provided with by-pass valve control, described vacuum pump is connected with described reaction vessel and for vacuumizing, described compound type vacuum meter is for detecting the vacuum tightness of described vacuum pump, described temperature sensor is for monitoring the bath temperature in described constant temperature water bath, described heating plate is placed in the lower floor in described reaction vessel, described condenser and described pressure transducer are all placed in the upper strata in described reaction vessel, described adjustable D. C regulated to be connected with described heating plate and for heating by described power measurement instrument, described refrigerant liquid storing ball to be connected with described condenser by described condenser pump and for providing cold to maintain the saturated vapor pressure in described reaction vessel, described pressure transducer is for measuring the saturated vapour pressure in described reaction vessel, the signal output part of described temperature sensor is connected with the signal input part of described data acquisition recorder respectively with the signal output part of described pressure transducer, described weighing instrument is placed in the below of described reaction vessel and the weight for measuring described reaction vessel.
As preferably, described liquid pool system, described extract system, described temperature control system, described heating-condensing system and described measuring system are all placed in a housing.
Beneficial effect of the present invention is:
Integrated hold-up vapour pressure of the present invention and latent heat of vaporization combined test system can carry out combined measurement to hold-up vapour pressure and the latent heat of vaporization, Stress control is stable, temperature control capacity is strong and integrating property is high, easy and simple to handle, considerably reduce experimental error, improve the accuracy of experiment, enhance System test function; Be embodied in:
(1) the present invention devises closed reaction vessel and replaces traditional balance pipe and control pressurer system, and be furnished with liquid pool system and extract system, be easy to draining of realization response tainer air, working medium to be measured can disposablely be injected, not easily there is suck-back in working medium, easy to operate, Stress control is stablized; Meanwhile, owing to adopting modular design, reaction vessel is also convenient to cleaning;
(2) the present invention improves constant temperature water bath and heating arrangement on traditional test device basic, adds cooling device, is configured with forced-convection heat transfer parts and stirrer, improves temperature control capacity and precision;
(3) the present invention adopts over all Integration to design, and reduces the scattered property of test macro, enhances the airtight performance of test macro, improve experiment operability;
(4) pre-buried heating plate in the lower floor of the present invention in reaction vessel and liquid layer, installs condenser in the upper strata in reaction vessel and gas blanket, makes this test macro can realize the measurement of gas latent heat, perfect test function.
Accompanying drawing explanation
Fig. 1 is the structural representation of the traditional liquid saturated vapour pressure measuring device based on static method;
Fig. 2 is the structural representation of integrated hold-up vapour pressure of the present invention and latent heat of vaporization combined test system, there is shown inner structure.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 2, integrated hold-up vapour pressure of the present invention and latent heat of vaporization combined test system, comprise the liquid pool system be all placed in a housing 20, extract system, temperature control system, heating-condensing system and measuring system, described liquid pool system comprises reaction vessel 29 and working medium liquid storing ball 32, described extract system comprises compound type vacuum meter 37 and vacuum pump 38, described temperature control system comprises compressor 25, evaporator 26, motor 27, stirrer 28, heating tube 34, pressure regulator 35 and constant temperature water bath 42, described heating-condensing system comprises refrigerant liquid storing ball 21, condenser pump 22, power measurement instrument 23, adjustable D. C regulated 24, condenser 30 and heating plate 36, described measuring system comprises pressure transducer 31, weighing instrument 39, data acquisition recorder 40 and temperature sensor 41, evaporator 26, stirrer 28, heating tube 34 and temperature sensor 41 are all placed in constant temperature water bath 42 with the reaction vessel 29 closed, compressor 25 is connected with evaporator 26 and for lowering the temperature, motor 27 is connected with stirrer 28 and for stirring, pressure regulator 35 is connected with heating tube 34 and for heating, working medium liquid storing ball 32 and reaction vessel 29 are connected and its connecting pipe are provided with by-pass valve control 33, vacuum pump 38 is connected with reaction vessel 29 and for vacuumizing, compound type vacuum meter 37 is for detecting the vacuum tightness of vacuum pump 38, temperature sensor 41 is for monitoring the bath temperature in constant temperature water bath 42, heating plate 36 is placed in the lower floor in reaction vessel 29, condenser 30 and pressure transducer 31 are all placed in the upper strata in reaction vessel 29, adjustable D. C regulated 24 to be connected with heating plate 36 by power measurement instrument 23 and for heating, refrigerant liquid storing ball 21 to be connected with condenser 30 by condenser pump 22 and for providing cold to maintain the saturated vapor pressure in reaction vessel 29, pressure transducer 31 is for measuring the saturated vapour pressure in reaction vessel 29, the signal output part of temperature sensor 41 is connected with the signal input part of data acquisition recorder 40 respectively with the signal output part of pressure transducer 31, weighing instrument 39 is placed in the below of reaction vessel 29 and the weight for measuring reaction vessel 29.The by-pass valve control 33 on being installed between compressor 25 and evaporator 26 and be installed between vacuum pump 38 and reaction vessel 29 pipeline is also show in Fig. 1.
As shown in Figure 2, the experimental procedure of integrated hold-up vapour pressure of the present invention and latent heat of vaporization combined test system is as follows:
1, to vacuumize and injection process: open the by-pass valve control 33 on the pipeline between vacuum pump 38 and reaction vessel 29, start vacuum pump 38, vacuumize in reaction vessel 29.After vacuum tightness in question response container 29 meets testing requirements, close this by-pass valve control 33.Open the by-pass valve control 33 on the connecting pipe between working medium liquid storing ball 32 and reaction vessel 29, the test worker quality liquid in working medium liquid storing ball 32 enters in reaction vessel 29, at this moment, closes this by-pass valve control 33, completes and vacuumize and injection process.
2, water bath with thermostatic control regulates: open pressure regulator 35, exports appropriate voltage to heating tube 34, to heating water bath.Meanwhile, in order to accelerate heat interchange in water-bath, devising forced convertion parts and stirrer 28, action of forced stirring is carried out to liquid in water-bath, strengthen heat exchange, ensure uniform temperature fields.When water-bath need lower the temperature or cool, start compressor 25, the cold of compressor 25 passes to water-bath by evaporator 26, lowers the temperature to water-bath.Read the data of putting temperature sensor 41 in water-bath by data acquisition recorder 40 at any time, carry out monitoring temperature.
3, saturated vapor pressure is measured: working medium to be measured can be subject to the impact of environment temperature after entering the reaction vessel 29 of vacuum, carries out the transformation of liquid gas.Pressure value can be passed to data acquisition recorder 40 by pressure transducer 31 in reaction vessel 29 in real time, when numerical value no longer changes, illustrate that the gas-liquid state in reaction vessel 29 reaches balance, pressure is now exactly the saturated vapor pressure of this working medium under current bath temperature.
4, latent heat is measured: after working medium vapor liquid equilibrium, heat the heating plate 36 being embedded in liquid internal in reaction vessel 29, liquid obtains the required latent heat changing gas into, will carry out liquid-gas shift.At this moment the pressure in reaction vessel 29 can increase, and affects latent heat test result.In order to ensure constant pressure, devise condenser 30, gaseous working medium touches condenser 30, again discharges latent heat, can condense into liquid state and to be attached in condenser 30 and to fall into gathering-device.In the power of suitable adjustment heating plate 36 and condenser 30, the flow of cold liquid, when pressure is stabilized to the saturated vapor pressure under bath temperature again, illustrates in reaction vessel 29 and again reaches mobile equilibrium.At this moment, by the Mass lost situation of reaction vessel 29 in weighing instrument 39 record unit time, record the power of heating plate 36 simultaneously, the latent heat of test working medium can be calculated.
Illustrate: the experimental technique related in above-mentioned experimentation, on the architecture basics of this test macro, just carry out the conventional method of testing, its method itself is not innovative solution of the present invention, does not protect.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (2)
1. an integrated hold-up vapour pressure and latent heat of vaporization combined test system, it is characterized in that: comprise liquid pool system, extract system, temperature control system, heating-condensing system and measuring system, described liquid pool system comprises reaction vessel and working medium liquid storing ball, described extract system comprises compound type vacuum meter and vacuum pump, described temperature control system comprises compressor, evaporator, motor, stirrer, heating tube, pressure regulator and constant temperature water bath, described heating-condensing system comprises refrigerant liquid storing ball, condenser pump, power measurement instrument, adjustable D. C regulated, condenser and heating plate, described measuring system comprises pressure transducer, weighing instrument, data acquisition recorder and temperature sensor, described evaporator, described stirrer, described heating tube and described temperature sensor are all placed in described constant temperature water bath with the described reaction vessel closed, described compressor is connected with described evaporator and for lowering the temperature, described motor is connected with described stirrer and for stirring, described pressure regulator is connected with described heating tube and for heating, described working medium liquid storing ball and described reaction vessel are connected and its connecting pipe are provided with by-pass valve control, described vacuum pump is connected with described reaction vessel and for vacuumizing, described compound type vacuum meter is for detecting the vacuum tightness of described vacuum pump, described temperature sensor is for monitoring the bath temperature in described constant temperature water bath, described heating plate is placed in the lower floor in described reaction vessel, described condenser and described pressure transducer are all placed in the upper strata in described reaction vessel, described adjustable D. C regulated to be connected with described heating plate and for heating by described power measurement instrument, described refrigerant liquid storing ball to be connected with described condenser by described condenser pump and for providing cold to maintain the saturated vapor pressure in described reaction vessel, described pressure transducer is for measuring the saturated vapour pressure in described reaction vessel, the signal output part of described temperature sensor is connected with the signal input part of described data acquisition recorder respectively with the signal output part of described pressure transducer, described weighing instrument is placed in the below of described reaction vessel and the weight for measuring described reaction vessel.
2. integrated hold-up vapour pressure according to claim 1 and latent heat of vaporization combined test system, is characterized in that: described liquid pool system, described extract system, described temperature control system, described heating-condensing system and described measuring system are all placed in a housing.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865968A (en) * | 2016-05-20 | 2016-08-17 | 北京大学 | Device for measuring saturated vapor pressure of liquid in porous medium |
| CN107632117A (en) * | 2017-09-11 | 2018-01-26 | 深圳冠亚水分仪科技有限公司 | A kind of measurement sensor of quick detection water activity |
| CN108983846A (en) * | 2018-06-21 | 2018-12-11 | 南方电网科学研究院有限责任公司 | Medium parameter measurement and control method |
| CN110044764A (en) * | 2019-05-10 | 2019-07-23 | 哈尔滨工业大学 | One kind measuring CO based on the grand equation of Clausius carat shellfish2The method and system of the latent heat of vaporization |
| CN112285152A (en) * | 2020-09-27 | 2021-01-29 | 西安交通大学 | High-temperature heat pipe alkali metal working medium evaporation and condensation measuring system and method |
| CN114002375A (en) * | 2021-09-27 | 2022-02-01 | 浙江泰林医学工程有限公司 | Hydrogen peroxide concentration sensor calibration device and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0661529A2 (en) * | 1993-12-28 | 1995-07-05 | INTECU Gesellschaft für Innovation, Technologie und Umwelt mbH | Procedure and device for leak testing of a volume and for determining the leaking amount |
| CN101174703A (en) * | 2006-10-18 | 2008-05-07 | 奥林巴斯映像株式会社 | Fuel battery margin testing method and device |
| US20110174070A1 (en) * | 2010-01-20 | 2011-07-21 | Envicor Incorporated | Storage tank assembly and system for storing waste cooking oil |
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| KR101427341B1 (en) * | 2013-05-29 | 2014-08-06 | (주) 예스티 | Temperature Sensor Box |
| CN104406715A (en) * | 2014-12-15 | 2015-03-11 | 重庆市勘测院 | Precision evaluation method and system for remote sensing estimation of surface sensible heat/latent heat flux |
| CN204649346U (en) * | 2015-05-26 | 2015-09-16 | 中国工程物理研究院总体工程研究所 | A kind of integrated hold-up vapour pressure and latent heat of vaporization combined test system |
-
2015
- 2015-05-26 CN CN201510272744.3A patent/CN104865003B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0661529A2 (en) * | 1993-12-28 | 1995-07-05 | INTECU Gesellschaft für Innovation, Technologie und Umwelt mbH | Procedure and device for leak testing of a volume and for determining the leaking amount |
| EP0661529A3 (en) * | 1993-12-28 | 1996-05-29 | Intecu Ges Fuer Innovation Tec | Procedure and device for leak testing of a volume and for determining the leaking amount. |
| CN101174703A (en) * | 2006-10-18 | 2008-05-07 | 奥林巴斯映像株式会社 | Fuel battery margin testing method and device |
| US20110174070A1 (en) * | 2010-01-20 | 2011-07-21 | Envicor Incorporated | Storage tank assembly and system for storing waste cooking oil |
| CN102607993A (en) * | 2012-04-09 | 2012-07-25 | 上海化工研究院 | Modularized vacuum system of saturated vapor pressure and solid density of tested substance and applications |
| KR101427341B1 (en) * | 2013-05-29 | 2014-08-06 | (주) 예스티 | Temperature Sensor Box |
| CN104406715A (en) * | 2014-12-15 | 2015-03-11 | 重庆市勘测院 | Precision evaluation method and system for remote sensing estimation of surface sensible heat/latent heat flux |
| CN204649346U (en) * | 2015-05-26 | 2015-09-16 | 中国工程物理研究院总体工程研究所 | A kind of integrated hold-up vapour pressure and latent heat of vaporization combined test system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865968A (en) * | 2016-05-20 | 2016-08-17 | 北京大学 | Device for measuring saturated vapor pressure of liquid in porous medium |
| CN105865968B (en) * | 2016-05-20 | 2018-11-23 | 北京大学 | The saturated vapor pressure measuring device of liquid in a kind of porous media |
| CN107632117A (en) * | 2017-09-11 | 2018-01-26 | 深圳冠亚水分仪科技有限公司 | A kind of measurement sensor of quick detection water activity |
| CN108983846A (en) * | 2018-06-21 | 2018-12-11 | 南方电网科学研究院有限责任公司 | Medium parameter measurement and control method |
| CN110044764A (en) * | 2019-05-10 | 2019-07-23 | 哈尔滨工业大学 | One kind measuring CO based on the grand equation of Clausius carat shellfish2The method and system of the latent heat of vaporization |
| CN110044764B (en) * | 2019-05-10 | 2021-10-15 | 哈尔滨工业大学 | CO measurement based on Clausis Claberon equation2Method and system for latent heat of vaporization |
| CN112285152A (en) * | 2020-09-27 | 2021-01-29 | 西安交通大学 | High-temperature heat pipe alkali metal working medium evaporation and condensation measuring system and method |
| CN112285152B (en) * | 2020-09-27 | 2021-08-13 | 西安交通大学 | High-temperature heat pipe alkali metal working medium evaporation and condensation measuring system and method |
| CN114002375A (en) * | 2021-09-27 | 2022-02-01 | 浙江泰林医学工程有限公司 | Hydrogen peroxide concentration sensor calibration device and method |
| CN114002375B (en) * | 2021-09-27 | 2024-05-17 | 浙江泰林医学工程有限公司 | Calibration device and method for hydrogen peroxide concentration sensor |
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