CN107607582A - Shell-and-tube heat exchanger two-phase local heat transfer test platform and method of testing - Google Patents
Shell-and-tube heat exchanger two-phase local heat transfer test platform and method of testing Download PDFInfo
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- CN107607582A CN107607582A CN201711035709.5A CN201711035709A CN107607582A CN 107607582 A CN107607582 A CN 107607582A CN 201711035709 A CN201711035709 A CN 201711035709A CN 107607582 A CN107607582 A CN 107607582A
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Abstract
The invention discloses a kind of shell-and-tube heat exchanger two-phase local heat transfer test platform, including boiler, boiler connects compressed air heater and hot-water heater respectively, hot-water heater connects hot water water knockout drum, compressed air heater and hot water water knockout drum are all connected with blender, blender connects experiment component, experiment component is sequentially connected cooling water tank, cooling tower and cooling water separator, cool down water separator and reconnect experiment component formation loop, experiment component is also sequentially connected separator, hot water and hot-water heater；The present invention is using air and water as working media, and for shell-side by hot water and the mixture of air, pipe side is passed through cooling water, completes heat exchanger thermal property and is tested with flow resistance characteristics.Test platform is built to complete the experiment of shell-and-tube heat exchanger two-phase, easy to operate, flexible modulation can be by changing hot water and cooling water flow velocity, and the content of incoagulable gas and the free air space exchange thermal efficiency of medium carry out many-sided research.
Description
Technical field
The invention belongs to heat exchanger technical field of measurement and test, more particularly to a kind of shell-and-tube heat exchanger two-phase local heat transfer test
Platform and method of testing.
Background technology
As modern science and technology include the hair of computer technology, the communication technology, sensing technology, modern control theory etc.
Exhibition, the gradual maturation of modern detecting, brand-new measuring technology have high accuracy, real-time height, friendly interface, easy to operate etc.
Advantage, it is widely used in actual production and laboratory research；In recent years, as industrial production will for heat exchanger precision
The continuous improvement asked, the development and research of heat exchanger performance test platform develop quickly.
The content of the invention
Goal of the invention：The invention provides a kind of shell-and-tube heat exchanger two-phase local heat transfer test platform and test side
Method, to solve the problems of the prior art.
Technical scheme：To achieve these goals, the present invention uses following technical scheme：
A kind of shell-and-tube heat exchanger two-phase local heat transfer test platform, including boiler 5, the boiler 5 connect compressed air respectively
Heater 4 and hot-water heater 6, the hot-water heater 6 connect hot water water knockout drum 7, the compressed air heater 4 and hot water
Water knockout drum 7 is all connected with blender 8, and the blender 8 connects experiment component 11, and the experiment component 11 is sequentially connected cooling water water
Case 12, cooling tower 13 and cooling water separator 14, cooling water separator 14 reconnect experiment component 11 and form loop, the experiment
Element 11 is also sequentially connected separator 10, hot water 9 and hot-water heater 6；
The compressed air heater 4 is also connected with air accumulator 3, and the air accumulator 3 is sequentially connected free dry machine 2 and air compressor machine 1；
Exhaust apparatus is additionally provided with the separator 10.
Further, it is also respectively provided with steam trap on the compressed air heater 4 and hot-water heater 6.
Further, the dry machine 2 of the sky and air accumulator 3, boiler 5 and compressed air heater 4, boiler 5 and hot water heating
It is all provided between device 6, blender 8 and experiment component 11, experiment component 11 and separator 10, cooling tower 13 and cooling water separator 14
It is equipped with ball valve；Check valve is provided between the experiment component 11 and cooling water tank 12；It is additionally provided with the cooling tower 13
Cooling tower circulating pump.
Further, two groups of ball valves, two range of flows are parallel between the hot water 9 and hot-water heater 6 not
Same water pump and two check valves；Hot water circulating pump is additionally provided with the hot-water heater 6.
Further, two groups of different regulations of open range are parallel between the compressed air heater 4 and blender 8
Valve, two flowmeters and two ball valves, connect again a ball valve and a check valve.
Further, be parallel between the hot water water knockout drum 7 and blender 8 two groups of different regulating valves of open range,
Two flowmeters and two ball valves, a check valve of connecting again.
Further, two groups of ball valves, two range of flows are parallel between the cooling water tank 12 and cooling tower 13 not
Same water pump and two check valves, a ball valve of connecting again；It is parallel between the cooling water separator 14 and experiment component 11
The different regulating valve of two two groups of open ranges, two flowmeters and two ball valves, then connect a check valve and a ball valve.
Further, temperature-measuring port is provided with the air accumulator 3, hot water 9 and cooling water tank 12 and pressure is surveyed
Mouthful；The inlet/outlet pipe road junction of the experiment component 11 is provided with temperature-measuring port and pressure surveys mouth.
Further, the regulating valve is all connected with the pneumatic valve port of air accumulator 3.
A kind of shell-and-tube heat exchanger two-phase local heat transfer method of testing, including compressed air system, vapour system, cooling water
System and test system, comprise the following steps：Start air compressor machine 1 and empty dry machine 2, adjust supply gas pressure, a part is to regulating valve
Supplied, another part enters experiment component 11 by compressed air heater 4 to blender 8.Start the He of cooling tower 13
Cooling tower circulating pump, cooling water arrive experiment component 11 again by cooling down water separator 14；Start hot water circulating pump, hot water is from hot water
Water tank 9 enters hot-water heater 6, then after hot water water knockout drum 7 mixes with pipeline into blender 8 with air, finally enters reality
Test element 11；Last starting trouble 5, steam enter hot-water heater 6 and compressed air heater 4, and water and air is carried out
Heating, steam condensation Cheng Shui, discharged from steam trap；After flow, temperature, pressure stability, start data acquisition, intraductal heat exchange knot
After beam, hot water is sent to separator 10 and returns hot water 9, and cooling water returns to cooling water tank 12, air emptying.
Beneficial effect：Using air and water as working media, shell-side is led to the present invention by hot water and the mixture of air, pipe side
Enter cooling water, complete heat exchanger thermal property and tested with flow resistance characteristics.Test platform is built to complete shell-and-tube heat exchanger
Two-phase is tested, easy to operate, flexible modulation, can be by changing hot water and cooling water flow velocity, the content of incoagulable gas and Jie
The free air space exchange thermal efficiency of matter carries out many-sided research.
In two-phase local heat transfer, keep hot water flow constant, by changing the flow of air, draw air content to two
The influence of the phase coefficient of heat transfer, friction drop, find out the mass gas content rate shell-and-tube heat exchanger shell side coefficient of heat transfer, friction drop
Relation；Because the disturbance that micro void fraction can strengthen fluid has the effect for promoting to exchange heat, increase the coefficient of performance of heat exchanger
Add, but reach to a certain degree, the speedup of pressure drop is more than the speedup of the coefficient of heat transfer, will decline the coefficient of performance, and this experiment can be with
The void fraction for making heat exchanger reach maximum performance coefficient under specific operation is found out, it is significant to strengthening shell-side heat transfer.Keep
Void fraction is constant, by changing the flow of hot water, draws influence of the hot water flow to the two-phase coefficient of heat transfer, friction drop, looks for
Go out hot water flow and the shell-and-tube heat exchanger shell side coefficient of heat transfer, the relation of friction drop；Keep the flow of gas-liquid mixture not
Become, by changing the flow of cooling water, find out the relation of the coefficient of heat transfer in the change and tube bank of cooling water flow.
Because cooling water, hot water and compressed air are equipped with the water pump of two different flow scopes and equipped with two aperture models
The parallel flow paths of different startup regulating valves are enclosed, so being available for the condition range of regulation very wide, adapt to the various specified works of difference
The shell-and-tube heat exchanger of condition different range, it can also provide void fraction excursion larger two-phase experimental study on heat transfer.
In addition, this experiment can be surveyed by each thermometer, pressure gauge and flowmeter temperature, pressure and flow, cooling
The switch conditions of the water level and boiler of water tank and hot water, cooling tower and each water circulating pump, and can enter in Control Room
Row real-time display simultaneously preserves the data related to processing, convenient to find produced problem in concurrency processing system in time.In addition this is
System directly can reach the purpose that regulation flow changes operating mode in the aperture of each pneumatic operated valve of Control Room regulation, operate flexible
Simply, securely and reliably.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is that Fig. 1 is simplification figure；
Wherein：1- air compressor machines, the empty dry machines of 2-, 3- air accumulators, 4- compressed air heaters, 5- boilers, 6- hot-water heaters, 7- heat
Water separator, 8- blenders, 9- hot waters, 10- separators, 11- experiment components, 12- cooling water tanks, 13- cooling towers,
14- cools down water separator.
Embodiment
The present invention is further described with reference to embodiment.
As shown in figure 1, a kind of shell-and-tube heat exchanger two-phase local heat transfer test platform, including boiler 5, the boiler 5 divide
Not Lian Jie compressed air heater 4 and hot-water heater 6, the hot-water heater 6 connects hot water water knockout drum 7, and the compression is empty
Hot-air heater 4 and hot water water knockout drum 7 are all connected with blender 8, and the blender 8 connects experiment component 11, the experiment component 11
Cooling water tank 12, cooling tower 13 and cooling water separator 14 are sequentially connected, cooling water separator 14 reconnects experiment component 11
Loop is formed, the experiment component 11 is also sequentially connected separator 10, hot water 9 and hot-water heater 6；
The compressed air heater 4 is also connected with air accumulator 3, and the air accumulator 3 is sequentially connected free dry machine 2 and air compressor machine 1；Institute
It is screw air compressor to state air compressor machine 1；
Exhaust apparatus is additionally provided with the separator 10.
Steam trap is also respectively provided with the compressed air heater 4 and hot-water heater 6.
The dry machine 2 and air accumulator 3 of the sky, boiler 5 and compressed air heater 4, boiler 5 and hot-water heater 6, blender
Ball valve is provided between 8 and experiment component 11, experiment component 11 and separator 10, cooling tower 13 and cooling water separator 14；
Check valve is provided between the experiment component 11 and cooling water tank 12；Cooling tower circulation is additionally provided with the cooling tower 13
Pump.The boiler 5 is electric heating steam boiler.
Be parallel between the hot water 9 and hot-water heater 6 the different water pump of two groups of ball valves, two range of flows and
Two check valves；Hot water circulating pump is additionally provided with the hot-water heater 6.
Two groups of different regulating valves of open range, two streams are parallel between the compressed air heater 4 and blender 8
Gauge and two ball valves, connect again a ball valve and a check valve.
Two groups of different regulating valves of open range, two flowmeters are parallel between the hot water water knockout drum 7 and blender 8
With two ball valves, a check valve of connecting again.
Be parallel between the cooling water tank 12 and cooling tower 13 the different water pump of two groups of ball valves, two range of flows and
Two check valves, a ball valve of connecting again；Two groups of aperture models are parallel between the cooling water separator 14 and experiment component 11
Different regulating valves, two flowmeters and two ball valves are enclosed, then connect a check valve and a ball valve.
Temperature-measuring port is provided with the air accumulator 3, hot water 9 and cooling water tank 12 and pressure surveys mouth；The reality
The inlet/outlet pipe road junction for testing element 11 is provided with temperature-measuring port and pressure survey mouth.
The regulating valve is all connected with the pneumatic valve port of air accumulator 3.Pneumatic control valve disclosure satisfy that to the sky from air accumulator
The hot water of gas and water case, cooling tower cold water progress flow is more accurate and easily adjusts.
The flow of two water pumps in parallel is respectively 6 m between the cooling water tank 12 and cooling tower 133/ h and 50m3/
H, the flow of two water pumps in parallel is respectively 6 m between hot water 9 and hot-water heater 63/ h and 50 m3/ h, cool down moisture
The open range of two regulating valves in parallel is 0.6-6 m respectively between hydrophone 14 and experiment component 113/ h and 6-60 m3/ h, heat
The open range of two regulating valves in parallel is 1-10m respectively between water separator 7 and blender 83/ h and 5-50 m3/ h, compression
The open range of two regulating valves in parallel is 10-80 m respectively between air heater 4 and blender 83/ h and 30-210m3/
h。
Air compressor machine and empty dry machine can be by the air for drying voltage stabilizing by being smoothly sent into gas-liquid mixed after metering, steam heating
Mixed in device with steam.And as pipe-line system reaches shell-and-tube heat exchanger, then emptied after separation.
Cooling tower possesses the cooling maximum amount of water of other equipment in maximum cooling water inflow and the system met needed for water cooling section.
And corresponding cooling water pump disclosure satisfy that the function of conveying and the recycling of cooling water.
A kind of shell-and-tube heat exchanger two-phase local heat transfer method of testing, including compressed air system, vapour system, cooling water
System and test system, comprise the following steps：Start screw air compressor 1 and empty dry machine 2, adjust supply gas pressure, a part is exchanged
Section valve is supplied, and another part enters the pipe shell type heat exchange of experiment component 11 by compressed air heater 4 to blender 8
Device shell-side.Start cooling tower 13 and cooling tower circulating pump, cooling water arrive the pipe of experiment component 11 by cooling down water separator 14 again
In shell heat exchanger pipe；Starting hot water circulating pump, hot water enters hot-water heater 6 from hot water 9, then through hot water water knockout drum 7
After being mixed with pipeline into blender 8 with air, experiment component 11 is finally entered；Finally start electric heating steam boiler 5, steam enters
Enter to hot-water heater 6 and compressed air heater 4, water and air is heated, steam condensation Cheng Shui, arranged from steam trap
Go out；After flow, temperature, pressure stability, start data acquisition, after intraductal heat exchange terminates, hot water is sent to separator 10 again
Hot water 9 is returned to, cooling water returns to cooling water tank 12, air emptying.
1st, during two-phase local heat transfer, keep hot water flow constant, by changing the flow of incoagulable gas air, pressed
Drop and the relation between mass gas content rate and heat flow density.
2nd, during two-phase local heat transfer, keep incoagulable gas content constant, by changing hot water and cooling water flow, find out
The change of hot water and cooling water flow and the heat exchanger coefficient of heat transfer and the relation of pressure drop.
3rd, during two-phase local heat transfer, keep each rate-of flow constant, by change the qualitative temperature of dry air or hot water come
Compare the influence of the qualitative temperature heat exchanging device coefficient of heat transfer.
4th, when two-phase is tested, keep above measured value constant, by changing heat exchanger structure, such as change the arrangement of tube bank
Mode, increase deflection plate carry out the influence of comparative structure heat exchanging coefficient and pressure drop.
5th, when two-phase is tested, by change the flowing space i.e. tube side of medium and shell side come compared with its to convection transfer rate
With the influence of pressure drop.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. shell-and-tube heat exchanger two-phase local heat transfer test platform, it is characterised in that：Including boiler（5）, the boiler（5） Compressed air heater is connected respectively（4）And hot-water heater（6）, the hot-water heater（6）Connect hot water water knockout drum（7）, The compressed air heater（4）With hot water water knockout drum（7）It is all connected with blender（8）, the blender（8）Connect experiment component （11）, the experiment component（11）It is sequentially connected cooling water tank（12）, cooling tower（13）With cooling water separator（14）, cooling Water separator（14）Reconnect experiment component（11）Form loop, the experiment component（11）Also it is sequentially connected separator（10）、 Hot water（9）And hot-water heater（6）；The compressed air heater（4）It is also connected with air accumulator（3）, the air accumulator（3）It is sequentially connected free dry machine（2）And sky Press（1）；The separator（10）On be additionally provided with exhaust apparatus.
- 2. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The compression Air heater（4）And hot-water heater（6）On be also respectively provided with steam trap.
- 3. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：It is described empty dry Machine（2）And air accumulator（3）, boiler（5）With compressed air heater（4）, boiler（5）And hot-water heater（6）, blender（8） And experiment component（11）, experiment component（11）And separator（10）, cooling tower（13）With cooling water separator（14）Between be all provided with It is equipped with ball valve；The experiment component（11）And cooling water tank（12）Between be provided with check valve；The cooling tower（13）It is upper to go back It is provided with cooling tower circulating pump.
- 4. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The hot water Water tank（9）And hot-water heater（6）Between be parallel with two groups of ball valves, two range of flows different water pump and two check valves； The hot-water heater（6）On be additionally provided with hot water circulating pump.
- 5. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The compression Air heater（4）And blender（8）Between be parallel with two groups of different regulating valves of open range, two flowmeters and two balls Valve, connect again a ball valve and a check valve.
- 6. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The hot water Water knockout drum（7）And blender（8）Between be parallel with two groups of different regulating valves of open range, two flowmeters and two ball valves, One check valve of series connection again.
- 7. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The cooling Water tank（12）And cooling tower（13）Between be parallel with two groups of ball valves, two range of flows different water pump and two check valves, One ball valve of series connection again；The cooling water separator（14）And experiment component（11）Between be parallel with two two groups of open ranges not Same regulating valve, two flowmeters and two ball valves, then connect a check valve and a ball valve.
- 8. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The gas storage Tank（3）, hot water（9）And cooling water tank（12）On be provided with temperature-measuring port and pressure and survey mouth；The experiment component（11） Inlet/outlet pipe road junction be provided with temperature-measuring port and pressure and survey mouth.
- 9. shell-and-tube heat exchanger two-phase local heat transfer test platform according to claim 1, it is characterised in that：The regulation Valve is all connected with air accumulator（3）Pneumatic valve port.
- 10. a kind of shell-and-tube heat exchanger two-phase local heat transfer method of testing, including compressed air system, vapour system, cooling water System and test system, it is characterised in that comprise the following steps：Start air compressor machine（1）With empty dry machine（2）, supply gas pressure is adjusted, A part supplies to regulating valve, and another part passes through compressed air heater（4）To blender（8）Enter experiment component （11）；Start cooling tower（13）With cooling tower circulating pump, cooling water is by cooling down water separator（14）Experiment component is arrived again（11）； Start hot water circulating pump, hot water is from hot water（9）Into hot-water heater（6）, then through hot water water knockout drum（7）Enter with pipeline Blender（8）After being mixed with air, experiment component is finally entered（11）；Last starting trouble（5）, steam enters hot water heating Device（6）With compressed air heater（4）, water and air is heated, steam condensation Cheng Shui, discharged from steam trap；Treat flow, After temperature, pressure stability, start data acquisition, after intraductal heat exchange terminates, hot water is sent to separator（10）Return hot water Water tank（9）, cooling water returns to cooling water tank（12）, air emptying.
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| CN201711035709.5A CN107607582A (en) | 2017-10-30 | 2017-10-30 | Shell-and-tube heat exchanger two-phase local heat transfer test platform and method of testing |
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| CN201711035709.5A CN107607582A (en) | 2017-10-30 | 2017-10-30 | Shell-and-tube heat exchanger two-phase local heat transfer test platform and method of testing |
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| CN102915777A (en) * | 2012-10-10 | 2013-02-06 | 西安交通大学 | Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof |
| CN106370690A (en) * | 2016-08-22 | 2017-02-01 | 上海交通大学 | Pipeline two-phase flow flash evaporation test system and method |
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2017
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| JPH07146263A (en) * | 1993-11-24 | 1995-06-06 | Kurita Water Ind Ltd | Estimation method for fouling coefficient of heat exchanger |
| CN101539535A (en) * | 2009-04-23 | 2009-09-23 | 南京工业大学 | Condensation property testing device of compound wind pipe flange |
| CN102915777A (en) * | 2012-10-10 | 2013-02-06 | 西安交通大学 | Liquid metal sodium boiling two-phase thermal-hydraulic test loop system and test method thereof |
| CN106370690A (en) * | 2016-08-22 | 2017-02-01 | 上海交通大学 | Pipeline two-phase flow flash evaporation test system and method |
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