CN107192571A - Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device - Google Patents
Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device Download PDFInfo
- Publication number
- CN107192571A CN107192571A CN201710453004.9A CN201710453004A CN107192571A CN 107192571 A CN107192571 A CN 107192571A CN 201710453004 A CN201710453004 A CN 201710453004A CN 107192571 A CN107192571 A CN 107192571A
- Authority
- CN
- China
- Prior art keywords
- condenser
- heat
- tube
- test device
- falling film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The outer refrigeration working medium falling film evaporation of a kind of horizontal tube bundle and single tube, pool boiling and condensation phase change heat exchange test device, the test device can carry out different tube banks (row) and falling film evaporation, film condensation and the test of full-liquid type boiling heat transfer outside single tube, can also carry out the unidirectional forced convertion flow resistance coefficient test in heat-transfer pipe water side.Its feature is that test device includes refrigeration working medium, heating three circulatory systems of water and cooling water.Test device can test any pipe row's spacing (more than 2mm), and any pipe arranges arrangement, the falling film evaporation and film condensation heat transfer of tube bank (row) outside.The phase-change heat transfer coefficient of any one heat-transfer pipe can be restrained simultaneously in.Measurement condition evaporation saturation temperature can change in 10 20 DEG C, condensation saturation temperature in 30 50 DEG C, test pressure in the range of 0 2.5MPa.Falling liquid film distributor can be changed according to demand.The present invention integrates Horizontal single-pipe, restrains outer phase-change heat-exchange and the side pressure fall-off test of single tube water, can meet different Research Requirements.
Description
Technical field
The present invention relates to field of Refrigeration and Air-conditioning, and in particular to the outer refrigeration working medium falling film evaporation of a kind of horizontal tube bundle and single tube,
Pool boiling and condensation phase change heat exchange test device.
Background technology
Downward film evaporator, flooded evaporator and condenser are widely used in refrigerating and air conditioning industry, are large-scale refrigeration
Crucial heat exchanger components inside air-conditioner set.The heat exchange of evaporator and condenser affects the operational efficiency of whole refrigeration unit,
Therefore it is the effective way for improving refrigerated air-conditioning system combination property to develop high performance evaporator and condenser.
Multiple rows of tube bank is disposed with horizontal shell-and-tube evaporator and condenser, pipe row mesh has because of system heat load demand
Difference.Developing the heat exchange property of efficient heat exchanger tube and research novel refrigerant all needs to the heat exchange outside heat transfer single tube and tube bank
Characteristic carries out integration test.Because being located at the heat-exchange performance that diverse location pipe is arranged in falling film evaporation, full-liquid type evaporation and condenser
Can be variant.The heat exchange property of tube bank and single tube must be tested respectively.
The content of the invention
It is it is an object of the invention to provide one kind collection Horizontal single-pipe, the outer phase-change heat-exchange of tube bank and the side pressure fall-off test of single tube water
One, can meet the outer refrigeration working medium falling liquid film of refrigeration air-conditioner manufacturer, the horizontal tube bundle of the different Research Requirements of scientific research institutions and single tube
Evaporation, pool boiling and condensation phase change heat exchange test device.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：Followed including refrigerant circulation, heating water and cooling water
Loop system；
Described refrigerant-cycle systems include the condenser with pressure sensor and the evaporation with pressure sensor
Device, cooling tube bundle, bottom are disposed with condenser top and is disposed with heat-transfer pipe, condenser internal memory contains liquid phase refrigerant, condensation
Device bottom refrigerant exit is connected by being provided with the pipeline of cold medium flux meter and a valve with the liquid film distributor in evaporator,
Test tube bank is arranged at the top of the lower end of liquid film distributor in evaporator, evaporator and bottom refrigerant exit also passes through respective pipe
Road and No. two valves, No. three valves on respective pipeline are connected with condenser；
Described heating water circulating system includes boiler, the electromagnetism exported by the road and on pipeline of boiler
Flowmeter and temperature sensor are connected with the testing tube beam entrance in evaporator, temperature of the test tube bank outlet by the road and on pipeline
Degree sensor is connected with the entrance of boiler；
Valve of the described boiler also by pipeline and on pipeline is connected with condenser thermal transfer pipe constitutes loop；
Described cooling water recirculation system includes cooling water tank, and the outlet of cooling water tank is by the road and on pipeline
Temperature sensor and valve are connected with the cooling tube bundle and the entrance of heat-transfer pipe in condenser, the outlet of cooling tube bundle and heat-transfer pipe
Temperature sensor, valve and cooling water flow meter by the road and on pipeline are connected with cooling water tank.
The installation site of described evaporator is higher than condenser.
Electric heater, described boiler and cooling are separately installed with described condenser, boiler and cooling water tank
Boiler air cooling chiller group and boiler air cooling chiller group are also associated with water tank.
Air bleeding valve is also equipped with described evaporator.
Heating pump and cooling water pump are separately installed with described boiler and cooling water tank export pipeline.
Filling refrigerant inlet and refrigerant recovering valve are additionally provided with described condenser.
Refrigerant pump is also equipped with the refrigerant exit pipeline of described condenser, is also associated with refrigerant pump entrance pipe
The bypass with No. four valves being connected with condenser.
Described cooling water selection cooling medium is water or glycol water；Evaporate saturation temperature be -10-20 DEG C, it is cold
Solidifying saturation temperature is 30-50 DEG C, test pressure is 0-2.5MPa.
The present invention can carry out the outer falling film evaporation of horizontal tube bundle under different operating modes, full-liquid type evaporation and condensation phase change heat transfer process
The test of heat transfer property；Single tube outer different operating mode (- 10-20 DEG C of evaporation saturation temperature and condensation saturation temperature 30-50 can be carried out
DEG C, test pressure 0-2.5MPa) descending film evaporates, full-liquid type evaporates and the heat exchange of condensation is tested；Also single tube water side pressure can be carried out
Drop and resistance coefficient test.Test data can fit exactly falling liquid film single tube, tube bank outside heat transfer correlations.Can basis
Different regulating working conditions thermic loads, and falling liquid film distributor is changed according to demand.
Brief description of the drawings
Fig. 1 is the outer falling film evaporation of horizontal tube bundle of the present invention and condensation heat transfer test system circulation figure；
Fig. 2 is the outer full-liquid type evaporation and heat-exchange experimental system circulation figure of Horizontal single-pipe of the present invention；
The outer full-liquid type evaporation heat transfer coefficient of Fig. 3 experimental system testing levels light pipe and Cooper formula contrasts；
Membranaceous condensation heat transfer coefficient and Nusselt Theory Solutions contrast outside Fig. 4 experimental system testing level light pipes；
Fig. 5 experimental systems test water sidelight pipe internal resistance force coefficient and Filonenko formula contrasts；
The exclusive Heat Transfer in Evaporating Falling Film coefficient of Fig. 6 experimental system testing tubes.
In figure：(1) condenser；(2) evaporator；(3) electromagnetic flowmeter；(4) pressure sensor；(5) cold medium flux meter；
(6) air bleeding valve；(7) refrigerant pump；(8) refrigerant inlet is filled；(9) heating pump；(10) boiler；(11) refrigerant recovering valve；
(12) cooling water pump；(13) cooling water tank；(14) liquid film distributor；(15) cooling water flow meter；(16) condenser heater.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1,2, the present invention includes refrigerant circulation, heating water and cooling water recirculation system；
Refrigerant-cycle systems are including the condenser 1 with pressure sensor and electric heater 16 and with pressure sensor
4 and the evaporator 2 of air bleeding valve 6, the installation site of evaporator 2 is higher than condenser 1, be disposed with the top of condenser 1 cooling tube bundle,
Bottom is disposed with heat-transfer pipe, and the internal memory of condenser 1, which is contained, is additionally provided with the filling He of refrigerant inlet 8 on liquid phase refrigerant, condenser 1
Refrigerant recovering valve 11, the bottom refrigerant exit of condenser 1 is by being provided with the pipeline and evaporator of cold medium flux meter 5 and a valve
The liquid film distributor 14 of 2 inner tops is connected, and test tube bank is arranged on the lower end of liquid film distributor 14 in evaporator 2, and evaporator 2 is pushed up
No. two valves, No. three valves and the condensation of portion and bottom refrigerant exit also by respective pipeline and on respective pipeline
Device 1 is connected；Be also equipped with refrigerant pump 7 on the refrigerant exit pipeline of condenser 1, be also associated with the entrance pipe of refrigerant pump 7 with
The bypass with No. four valves that condenser 1 is connected；
Described heating water circulating system include with electric heater boiler 10, the outlet of boiler 10 by the road and
Heating pump 9, electromagnetic flowmeter 3 and temperature sensor on pipeline are connected with the testing tube beam entrance in evaporator 2,
Temperature sensor of the test tube bank outlet by the road and on pipeline is connected with the entrance of boiler 10；
Valve of the described boiler 10 also by pipeline and on pipeline is connected with the heat-transfer pipe of condenser 1 to be constituted back
Road；
Described cooling water recirculation system includes the cooling water tank 13 with electric heater, and the outlet of cooling water tank 13 is through pipe
Road and cooling water pump 13, temperature sensor and the valve on pipeline and the cooling tube bundle in condenser 1 and heat-transfer pipe
Entrance is connected, the temperature sensor, valve and the cooling water that export by the road and on pipeline of cooling tube bundle and heat-transfer pipe
Flowmeter 15 is connected with cooling water tank 13；The cooling water selection cooling medium of the present invention is water or glycol water；Evaporation is full
Be -10-20 DEG C with temperature, condensation saturation temperature be 30-50 DEG C, test pressure be 0-2.5MPa；
Boiler air cooling chiller group and the air-cooled system of boiler are also associated with described boiler 10 and cooling water tank 13
Cold group.
The outer Heat Transfer in Evaporating Falling Film test refrigerant circulation principle of tube bank：Test tube bank is arranged in evaporator 2.Liquid refrigeration work
Matter is charged in the bottom of condenser 1, and evaporator 2 is flowed into after being pressurizeed through refrigerant pump 7.In test heating surface bank after liquid film distributor 14
Heating water is passed through in outer uniform falling liquid film, test heating surface bank, refrigeration working medium evaporates outside tube bank, is changed into gaseous state from liquid, from top
Portion flows into condenser 1, and the refrigeration working medium not being evaporated returns to condenser 1 from the bottom of evaporator 2.Cooling tube is furnished with condenser 1
Cooling water is passed through in beam, pipe.Condensed outside the gas phase refrigeration working medium tube bank within the condenser that falling film evaporator is flowed into and become liquid
Body is again introduced into the cyclic process of refrigeration working medium.Two pairs of visualization windows, observable are evenly equipped with falling film evaporator and condenser
The distribution situation of diverse location liquid film in Heat Transfer in Evaporating Falling Film test process.Cooling tube bundle is arranged on condenser top, will be evaporated to
The refrigerant of gas phase is stored in condenser bottom after condensing.In test process, the saturation temperature in system remains constant, condenser
Effect is the saturation temperature and pressure needed for falling film evaporation in maintenance system.
Full liquid single tube Pool Boiling Heat Transfer test refrigerant circulation principle：Pool Boiling Heat Transfer test heat-transfer pipe is arranged on condenser
Bottom.Heat-transfer pipe is installed compresses sealing using screw thread, it is easy to mount and dismount.Refrigeration working medium is charged in condenser bottom, boiling
Hot water is passed through in heat-transfer pipe, refrigerant boiling heat transfer outside heat-transfer pipe absorbs heat, gas phase is changed into from liquid phase.Lead in cooling tube bundle
Enter cooling water, the refrigerant for being changed into gas phase becomes liquid phase in outer condense of tube bank, and condenser bottom is returned under gravity.
Heat Transfer in Evaporating Falling Film and pool Boiling Heat Transfer share identical heat cycles water route.It is cold when pool Boiling Heat Transfer is tested
Matchmaker's air pump inoperative, evaporator and condenser connecting pipeline valve are closed, and the heating surface bank current valve for being not involved in heat exchange is closed.
Membranaceous condensation heat transfer test loop principle outside horizontal tube bundle and single tube：Cooling tube bundle is installed within the condenser, liquid
The falling film evaporation outside the horizontal tube bundle of evaporator of phase refrigeration working medium becomes gas, flows into condenser.Gas phase refrigerant is within the condenser
Condensed outside heating surface bank and become liquid.The condensation heat transfer performance of heat-transfer pipe is tested in condensation process.Can be with testing tube row and liquid
Influence of the film thickness for condensation heat transfer.Heating water maintains system institute for the heat needed for system is provided in falling film evaporation pipe row
The condensation saturation temperature needed.Condensation tube bank can be also arranged in evaporator, and liquid phase refrigerant is added by the electricity installed within the condenser
Heat heating becomes steam, and exclusive condensation is managed in evaporator, its heat transfer coefficient is tested.
When testing the film condensation heat transfer outside single tube, water route is closed by valve in remaining pipe row, only stays single tube water flowing i.e.
The condensation heat transfer test outside single tube can be carried out.Test process refrigerant circulation principle is identical with outer condensation heat transfer experiment is restrained.
In an experiment, it is necessary to which the data of test include：In refrigeration working medium gas phase temperature in evaporator, condenser gas phase with
And liquidus temperature, liquid film distributor entrance refrigerant temperature, environment temperature, out temperature, the temperature difference and the flow of cooling water are different
Pressure in out temperature, the temperature difference and the flow of pipe row's heating water, evaporator and condenser, and heat-transfer pipe water side pressure drop
Deng.The experiment data to be obtained include：The overall heat-transfer coefficient of different pipe rows or single tube, pipe interior convection transfer rate, pipe foreign minister
Become the coefficient of heat transfer and water lateral resistance coefficient.The above-mentioned data accuracy to be tested directly influences the not true of heat transfer coefficient measure
Fixed degree, temperature, pressure and the accuracy of flow measurement must be improved as far as possible.In addition, the length of heat exchanger tube should be greater than 0.5m.
Experiment test enters steady-state criterion：Regulating water flow, electrical heating power or heating coolant-temperature gage, coolant water temperature, make be
System reaches predetermined equalization point.If system pressure measured value correspondence saturation temperature value changes are less than 0.1 DEG C within ten minutes, together
When cooling water (or heating water) inlet water temperature determine value changes and be no more than 0.1 DEG C, then it is assumed that system has reached stable state.
Experimental system includes heating two water circulation systems of water and cooling water.Circulation waterway has Insulation along journey.It is logical
Current can be divided equally by crossing water knockout drum, it is ensured that the flow flowed through between different test heat-transfer pipes is identical, and fluctuation is less than ± 0.1m/s.It is cold and hot
Air cooling chiller group and electric heating system are equipped with water tank, can adjust and maintain the temperature in water tank in the range of ± 0.1 DEG C.Root
According to design temperature and heating amount requirement, electrical heating power can be automatically controlled.
When completing falling film evaporation experiment, boiler heats water and pressurizes a part through bypassing reflow tank through water pump, another
Part returns to water tank after flowing through evaporator, and refrigerant heat exchange.Cooling water flows through condenser, is returned after gas phase refrigerant cooling is condensed
Recovery tank.
Water circulation system includes：
(1) boiler and each 1 of cold water storage cistern, volume need to meet system circulation needs, and water tank is 304 stainless steel inner containers, outside
Plus polyurethane insulation coating, insulation thickness is more than 100mm.Water tank intermediate arrangement mixed flow baffle plate, can be achieved Water in Water Tanks stream and fully mixes
Close.If experiment test evaporation saturation temperature requirement is less than 10 degrees Celsius, ethylene glycol can be charged in cold water storage cistern to meet experiment system
System cooling is required.
(2) air cooling chiller group 2.Respectively cold water storage cistern and boiler provide reliable refrigerating capacity.Cold water storage cistern is experiment
System provides chilled water.Boiler provides heating water for system.Cold water storage cistern and pure water tank configure electric heating system, can be continuous
Adjust electrical heating power.Console installs digital electric power Parameters Instrument, can monitor the electrical heating power of water tank.Two water tank temperatures
Can be achieved to automatically control after setting keeps water temperature constant.Boiler lower water temperature excursion：1-60 DEG C, cold water storage cistern temperature：-
5-30℃。
Two water tanks are used simultaneously, and institute is maintained at by refrigeration unit, electric heater heating and temperature controller control water tank temperature
It is required that within the scope of.
Processing for Data Analysis in Physics
Exemplified by restraining outer falling film evaporation heat exchange test：
In falling film evaporation heat exchange, the heat exchange amount of every heat-transfer pipe can be obtained by below equation：
Cooling tube bundle is exchanged heat, the heat exchange amount of every heat-transfer pipe can be obtained by below equation：
WhereinWithThe mass flow of water and cooling water is heated in respectively single tube bank.φe,mAnd φc,nRespectively
For the evaporation and heat-exchange amount and condensing heat-exchange amount of single heat-transfer pipe.te,m,inAnd te,m,outThe import and export of respectively single heating water
Temperature.tc,n,inAnd tc,n,outThe out temperature of respectively single cooling water.cp,mAnd cp,nAdd in respectively managing under average temperature
The constant pressure specific heat of hot water and cooling water is held.
After the heat exchange amount for every heat-transfer pipe for obtaining heating tube and cooling tube, it can check that whole experiment is by below equation
The thermal balance of system：
In above formula, φpFor the power of refrigerant pressurization canned motor pump, m and n are respectively to be arranged in falling film evaporator and condenser
Heat-transfer pipe number, φaFor Average heat transfer amount, calculated by below equation：
The overall heat-transfer coefficient calculation formula of every evaporation heat transfer pipe is：
AoFor the outer surface heat exchange area of single heat transfer, Ao=π doL, doBe respectively with L enhanced tube embryonic tube external diameter and
Effectively exchange heat length.△TmIt is heat transfer temperature difference, its calculating formula is：
For evaporation operating mode：
Wherein, TsIt is evaporation saturation temperature.
The heat flow density of wherein single heat transfer is：
In order to compare evaporation heat transfer coefficient of the different heat transfer pipe under different evaporating temperatures, in addition it is also necessary to obtain pipe inside and outside right
The occurrence of the coefficient of heat transfer is flowed, the composition of heat transfer process thermal resistance is obtained.So, to the improvement of heat-transfer pipe performance, it is possible to there is pin
To property carry out.Therefore, it is necessary to be separated to the thermal resistance inside and outside pipe.
Convection transfer rate is calculated using Gnielinski formula in the pipe of light pipe：
In formula：
F=(1.82lgRe-1.64)-2
For doubly-enhanced tubes, then reinforcing times of the water side heat transfer coefficient with respect to light pipe is obtained by Wilson thermal resistances partition method
Rate.Obtain reinforcing multiplying power after, can outside following two formulas computer tube the coefficient of heat transfer and Nusselt numbers：
Nusselt numbers：
Condensation heat transfer test outside tube bank and single tube is similar with the outer full-liquid type evaporation data processing method of single tube, single tube experiment
Only pipe row in tube bank need to be changed to single tube and calculate thermal balance.
In summary, the phase-change heat transfer coefficient of measuring enhanced tube includes two parts content：Single bilateral is determined first
Reinforcing multiplying power of the single-phase forced convection heat transfer coefficient relative to light pipe in enhanced tube pipe.Tube bank reinforcing multiplying power can be by full outside single tube
Liquid formula or condensation heat transfer are tested to obtain.Secondly measurement enhanced tube single tube and the outer falling film evaporation of tube bank, condensation and full-liquid type evaporation
The coefficient of heat transfer.
By differential pressure transmitter measure it is different in flow rate under water side pressure drop, heat-transfer pipe water lateral resistance coefficient can pass through following public affairs
Formula is calculated：
Wherein △ p are the pressure drop between developmental tube import and export section, and L is then experiment segment length, umFor water flow velocity, ρ is
Water density, diFor heat-transfer pipe embryonic tube internal diameter.
Thin film drainage state is characterized with Renault number of liquid membrane.Renault number of liquid membrane is defined as follows.
Wherein, the mass flow on unit pipe range is the mass flow on Γ (one side), pipe range Lμ is power
Viscosity/kgm-1·s-1。
Fig. 2 is the systematic cyclic graph of the outer full-liquid type evaporation heat transfer coefficient measurement of Horizontal single-pipe.When the 1-4 valves of experimental system
Door is closed, and heating surface bank is not involved in heat exchange in evaporator 2, and experimental system is run under Horizontal single-pipe full-liquid type evaporating state.Survey
Try full-liquid type single tube and be arranged on condenser bottom, be immersed in liquid phase refrigerant, refrigerant charges height than heat-transfer pipe top up to
Few 20mm.Heating moisture goes out to be passed through all the way in the full liquid single tube of test, condenser takes 3 to be passed through cooling water in condensation tube bank, is used for
Condensation evaporation is changed into the refrigerant of gas phase.
Fig. 3 is the outer full-liquid type evaporation heat transfer coefficient of experimental system testing level light pipe and Cooper formula contrasts.In order to test
The reliability of confirmatory test system, can be by full-liquid type boiling heat transfer coefficient outside the smooth single tube of experiment test and Cooper progress pair
Than.In heat flow density 10-40kW/m2In the range of, the deviation of test data of experiment and the formula should be less than ± 15%.
Membranaceous condensation heat transfer coefficient and Nusselt Theory Solutions contrast outside Fig. 4 experimental system testing level light pipes.In order to verify
The reliability of pilot system, can also enter membranaceous condensation heat transfer coefficient and Nusselt Theory Solutions outside the smooth single tube of experiment test
Row contrast.In heat flow density 10-40kW/m2In the range of, the deviation of test data of experiment and the formula should be less than ± 15%.
Fig. 5 experimental systems test water sidelight slip pipe internal resistance force coefficient and Filonenko formula contrasts.For confirmatory experiment system
Unified test tries the reliability of water lateral resistance coefficient, can be public by flow resistance coefficient experimental results in plain tube and Filonenko
Formula is contrasted.In the range of in-pipe flow speed 1.0-4.0m/s, the deviation of test data of experiment and the formula should be less than ±
10%.
The exclusive Heat Transfer in Evaporating Falling Film coefficient of Fig. 6 experimental system testing tubes.It is close that the transformable parameter of experimentation includes hot-fluid
Degree, liquid film flow, in-pipe flow speed.By changing parameter, in heat flow density 20kW/m2, the exclusive falling film evaporation biography of difference pipe
Hot coefficient such as Fig. 6.
Claims (8)
1. horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device, its feature exist
In：Including refrigerant circulation, heating water and cooling water recirculation system；
Described refrigerant-cycle systems include the condenser (1) with pressure sensor and the evaporator with pressure sensor
(2) cooling tube bundle, bottom, are disposed with condenser (1) top and is disposed with heat-transfer pipe, condenser (1) internal memory contains liquid phase refrigeration
Agent, condenser (1) bottom refrigerant exit is interior by the pipeline and evaporator (2) for being provided with cold medium flux meter (5) and a valve
The liquid film distributor (14) at top is connected, and test tube bank is installed in the lower end of the interior liquid film distributor (14) of evaporator (2), evaporator
(2) No. two valves, No. three valves of top and bottom refrigerant exit also by respective pipeline and on respective pipeline
It is connected with condenser (1)；
Described heating water circulating system includes boiler (10), and the outlet of boiler (10) is by the road and on pipeline
Electromagnetic flowmeter (3) and temperature sensor are connected with the testing tube beam entrance in evaporator (2), test tube bank outlet by the road and
Temperature sensor on pipeline is connected with the entrance of boiler (10)；
Valve of the described boiler (10) also by pipeline and on pipeline is connected with condenser (1) heat-transfer pipe to be constituted back
Road；
Described cooling water recirculation system includes cooling water tank (13), and the outlet of cooling water tank (13) is by the road and installed in pipeline
On temperature sensor and valve be connected with the cooling tube bundle and the entrance of heat-transfer pipe in condenser (1), cooling tube bundle and heat transfer
Temperature sensor, valve and cooling water flow meter (15) and cooling water tank (13) of the outlet of pipe by the road and on pipeline
It is connected.
2. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：The installation site of described evaporator (2) is higher than condenser (1).
3. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Electricity is separately installed with described condenser (1), boiler (10) and cooling water tank (13)
Boiler air cooling chiller group is also associated with heater, described boiler (10) and cooling water tank (13) and boiler is air-cooled
Refrigeration unit.
4. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Air bleeding valve (6) is also equipped with described evaporator (2).
5. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Heating is separately installed with described boiler (10) and cooling water tank (13) export pipeline
Water pump (9) and cooling water pump (12).
6. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Filling refrigerant inlet (8) and refrigerant recovering valve are additionally provided with described condenser (1)
(11)。
7. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Refrigerant pump (7) is also equipped with the refrigerant exit pipeline of described condenser (1), in refrigerant
The bypass with No. four valves being connected with condenser (1) is also associated with pump (7) entrance pipe.
8. horizontal tube bundle according to claim 1 and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change are changed
Heat test device, it is characterised in that：Described cooling water selection cooling medium is water or glycol water；Evaporate saturation temperature
For -10-20 DEG C, condensation saturation temperature be 30-50 DEG C, test pressure be 0-2.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453004.9A CN107192571B (en) | 2017-06-15 | 2017-06-15 | Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453004.9A CN107192571B (en) | 2017-06-15 | 2017-06-15 | Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107192571A true CN107192571A (en) | 2017-09-22 |
| CN107192571B CN107192571B (en) | 2019-01-29 |
Family
ID=59878452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710453004.9A Active CN107192571B (en) | 2017-06-15 | 2017-06-15 | Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107192571B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109992846A (en) * | 2019-03-14 | 2019-07-09 | 北京石油化工学院 | The emulation mode of solar cross-season underground pipe accumulation of heat |
| CN110133037A (en) * | 2019-06-12 | 2019-08-16 | 中国核动力研究设计院 | A kind of experimental provision to conduct heat for studying pool boiling under the structure of different heating face |
| CN111189879A (en) * | 2020-03-03 | 2020-05-22 | 航天晨光股份有限公司 | Horizontal pipe external condensation heat exchange test device and test method |
| CN113281074A (en) * | 2021-05-17 | 2021-08-20 | 青岛海信日立空调***有限公司 | Performance degradation diagnosis method for condenser and evaporator of water chilling unit |
| CN114486308A (en) * | 2021-12-30 | 2022-05-13 | 北京动力机械研究所 | Micro-tube bundle heat exchange characteristic experiment method |
| CN116818225A (en) * | 2023-08-30 | 2023-09-29 | 新乡市龙翔精密铜管有限公司 | Heat transfer tube detection device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163351Y (en) * | 1993-06-10 | 1994-04-27 | 神匠实业股份有限公司 | Water cooling cold-air machine |
| US20020050342A1 (en) * | 1999-12-01 | 2002-05-02 | Advanced Mechanical Technology, Inc. | Heat exchanger with internal pin elements |
| CN1460035A (en) * | 2000-09-19 | 2003-12-03 | K·C·科技株式会社 | System for forming aerosols and cooling device incoporated therein |
| CN101576518A (en) * | 2009-06-17 | 2009-11-11 | 中国科学院广州能源研究所 | Experimental device for evaporation, absorption and mass transferring of falling film of vertical tube |
| CN103808757A (en) * | 2014-03-05 | 2014-05-21 | 上海理工大学 | Experimental table for testing heat exchange performance of single tube |
| CN106052190A (en) * | 2016-06-01 | 2016-10-26 | 西安交通大学 | Active-regeneration type thermoelastic refrigeration system |
-
2017
- 2017-06-15 CN CN201710453004.9A patent/CN107192571B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163351Y (en) * | 1993-06-10 | 1994-04-27 | 神匠实业股份有限公司 | Water cooling cold-air machine |
| US20020050342A1 (en) * | 1999-12-01 | 2002-05-02 | Advanced Mechanical Technology, Inc. | Heat exchanger with internal pin elements |
| CN1460035A (en) * | 2000-09-19 | 2003-12-03 | K·C·科技株式会社 | System for forming aerosols and cooling device incoporated therein |
| CN101576518A (en) * | 2009-06-17 | 2009-11-11 | 中国科学院广州能源研究所 | Experimental device for evaporation, absorption and mass transferring of falling film of vertical tube |
| CN103808757A (en) * | 2014-03-05 | 2014-05-21 | 上海理工大学 | Experimental table for testing heat exchange performance of single tube |
| CN106052190A (en) * | 2016-06-01 | 2016-10-26 | 西安交通大学 | Active-regeneration type thermoelastic refrigeration system |
Non-Patent Citations (2)
| Title |
|---|
| 冀文涛 等: "高热通量水平管外池沸腾传热", 《化工学报》 * |
| 张定才 等: "R134a/R125混合工质水平管外凝结换热", 《化工学报》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109992846A (en) * | 2019-03-14 | 2019-07-09 | 北京石油化工学院 | The emulation mode of solar cross-season underground pipe accumulation of heat |
| CN109992846B (en) * | 2019-03-14 | 2022-12-09 | 北京石油化工学院 | Simulation method for solar cross-season buried pipe heat storage |
| CN110133037A (en) * | 2019-06-12 | 2019-08-16 | 中国核动力研究设计院 | A kind of experimental provision to conduct heat for studying pool boiling under the structure of different heating face |
| CN110133037B (en) * | 2019-06-12 | 2021-11-30 | 中国核动力研究设计院 | Experimental device for be used for studying pool boiling heat transfer under different heating surface structures |
| CN111189879A (en) * | 2020-03-03 | 2020-05-22 | 航天晨光股份有限公司 | Horizontal pipe external condensation heat exchange test device and test method |
| CN113281074A (en) * | 2021-05-17 | 2021-08-20 | 青岛海信日立空调***有限公司 | Performance degradation diagnosis method for condenser and evaporator of water chilling unit |
| CN113281074B (en) * | 2021-05-17 | 2023-01-13 | 青岛海信日立空调***有限公司 | Performance degradation diagnosis method for condenser and evaporator of water chilling unit |
| CN114486308A (en) * | 2021-12-30 | 2022-05-13 | 北京动力机械研究所 | Micro-tube bundle heat exchange characteristic experiment method |
| CN114486308B (en) * | 2021-12-30 | 2024-05-10 | 北京动力机械研究所 | Heat exchange characteristic experimental method for micro tube bundle |
| CN116818225A (en) * | 2023-08-30 | 2023-09-29 | 新乡市龙翔精密铜管有限公司 | Heat transfer tube detection device and method |
| CN116818225B (en) * | 2023-08-30 | 2024-02-27 | 新乡市龙翔精密铜管有限公司 | Heat transfer tube detection device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107192571B (en) | 2019-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107192571B (en) | Horizontal tube bundle and the outer refrigeration working medium falling film evaporation of single tube, pool boiling and condensation phase change heat exchange test device | |
| Ji et al. | Effect of vapor flow on the falling film evaporation of R134a outside a horizontal tube bundle | |
| Jain et al. | Experimental studies on the dehumidifier and regenerator of a liquid desiccant cooling system | |
| Jouhara et al. | Thermal performance characteristics of a wraparound loop heat pipe (WLHP) charged with R134A | |
| Islam et al. | Experimental and numerical study of an evaporatively-cooled condenser of air-conditioning systems | |
| CN104966536A (en) | High-temperature working medium heat exchange test system using heat conducting oil as hot fluid and test method | |
| Mancin et al. | R134a flow boiling heat transfer and pressure drop inside a 3.4 mm ID microfin tube | |
| Yashar et al. | Rooftop air-conditioning unit performance improvement using refrigerant circuitry optimization | |
| Chen | An experimental investigation of nucleate boiling heat transfer from an enhanced cylindrical surface | |
| Zhu et al. | Study of convection heat transfer of CO2 at supercritical pressures during cooling in fluted tube-in-tube heat exchangers | |
| Zou et al. | Effect of servers’ arrangement on the performance of a loop thermosyphon system used in data center | |
| Zhang et al. | Experimental investigation on the geometric structure with perforated baffle for thermal stratification of the water tank | |
| Wei et al. | Experimental and computational investigation of the thermal performance of a vertical tube evaporative condenser | |
| Cao et al. | Effect of non-condensable gas on the behaviours of a controllable loop thermosyphon under active control | |
| Schmid et al. | Development of a solar-driven diffusion absorption chiller | |
| Song et al. | Experimental investigation on closed-type heating tower using glycerol solution | |
| Zhao et al. | Heat transfer and fouling characteristics during falling film evaporation in a vertical sintered tube | |
| Yin et al. | Experimental investigation of two-phase thermosyphon loop for passive containment cooling | |
| Castro et al. | Modelling of the heat exchangers of a small capacity, hot water driven, air-cooled H2O–LiBr absorption cooling machine | |
| Olbricht et al. | Experimental investigation of the heat and mass transfer in a tube bundle absorber of an absorption chiller | |
| Fernández-Seara et al. | Experimental heat transfer coefficients of pool boiling and spray evaporation of ammonia on a horizontal plain tube | |
| Cheng et al. | Study of vapor liquid two-phase frictional pressure drop in a vertical heated spirally internally ribbed tube | |
| Andrzejczyk et al. | The performance of H 2 O, R134a, SES36, ethanol, and HFE7100 two-phase closed thermosyphons for varying operating parameters and geometry | |
| CN107246975A (en) | A kind of flow refrigerator with adjustable heat exchanger performance test system | |
| Zheng et al. | Boiling of ammonia/lubricant mixture on a horizontal enhanced tube in a flooded evaporator with inlet vapor quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |