CN108872304B - A kind of steam generator inclination tube bank local heat transfer device and method - Google Patents
A kind of steam generator inclination tube bank local heat transfer device and method Download PDFInfo
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
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Abstract
A kind of steam generator inclination tube bank local heat transfer device and method, the experimental provision includes inclination tube bank, rectangle casing, entrance divergent segment, export converging transition, rectifying component, inlet connection, discharge connection, wherein, entrance divergent segment and inlet connection are successively welded on rectangle casing part, outlet converging transition and discharge connection are successively welded on rectangle casing top, inclination tube bank is downwardly into rectangle casing from external oblique 45 ° by reserved through hole, rectifying component is mounted on rectangle casing part, experimental provision is connected by inlet connection and discharge connection with entire test pipe system, above-mentioned apparatus overall structure is simple, it is easily worked, it is low in cost, simulator is provided for the flowing of steam generator inclination tube bank and the research of heat-transfer character；The present invention also provides the experimental methods of the experimental provision；This method can be carried out the experiment of single-phase water, steam-water two-phase fluid, and the intake condition by changing working medium tilts tube bank heat transfer characteristic test experiments and verification test to steam generator.
Description
Technical field
The present invention relates to Steam Generators in NPP technical fields, and in particular to a kind of steam generator inclination tube bank heat exchange
Experimental provision and method.
Background technique
Steam generator is the hinge of one, secondary circuit in nuclear reactor, and the heat transfer that it generates primary Ioops is given two times
Road generates the power generation of steam drive steamer device.Under nominal situation, the relatively hot coolant of reactor core is flowed through from pressure vessel outlet ozzle stream
Out, enter steam generator by hot pipe section, it is cooling by the water of secondary side in Steam Generator U area under control, later through coupling tube
Section enters main pump, injects reactor core through cold tube section again after being boosted by main pump.The water of secondary side obtains the heat of primary side transmitting, occurs
Vaporization reaches steamer device system, driving steamer device power generation after steam-water separation acts on.If steam generator heat-transfer pipe occurs broken
Damage, primary side coolant will enter secondary side, cause the leakage of radiation, threaten npp safety.The reason of heat-transfer pipe breakage
Mainly there are abrasion, corrosion and fatigue etc., these phenomenons are all closely related with the flowing in steam generator and the feature that exchanges heat, therefore
Test or experimental verification for steam generator heat-transfer pipe development heat transfer characteristic is extremely important.The present invention is based on this need
It asks and provides a kind of dress that can carry out steam generator heat exchange tube beam Experimental Study of Heat Transfer Characteristics under the inclined operating condition of heat-transfer pipe
It sets.It is existing to still have some shortcomings for the experiment of steam generator heat-transfer pipe heat exchange and theory, it can only such as carry out single tube
Experiment can only calculate inclination tube bank heat exchange using approximate and rule-of-thumb relation method, be unable to satisfy or improve nuclear power pass
The reliability requirement of button apparatus.
For example, Chinese Patent Application No. CN 201320188149.8 discloses a kind of outer forced-convection heat transfer experiment dress of pipe
It sets.The device includes ventilation duct, testing tube, experiment tube, pitot tube, expansion pipe, centrifugal induced draught fan with loudspeaker import.Ventilation
It is equipped with lattice structure in pipe, current stabilization strainer is equipped between ventilation duct and testing tube, thermometer is equipped in testing tube, is equipped in experiment tube
Heat-generating pipe takes air hose to be connected with differential manometer.The inventive structure is simple, production maintenance cost it is low, experiment airflow stability it is good and
Turbulivity is also preferable, effectively increases the precision of test.But the device throughput is small, the single tube heat exchange that can only carry out air is real
It tests, single-phase water or steam-aqueous fluid tube bank local heat transfer can not be carried out, can not also carry out the experiment of inclination tube bank.
In another example 202101956 U of Chinese Patent Application No. CN, discloses a kind of single heat exchange tube testing device.The dress
It sets including heat exchanger tube, shell, delivery pump, fluid reservoir and import and export valve, it is characterised in that: the heat exchanger tube is single heat exchange tube
Body, the shell is by connecting end socket and sealing plate including several shell rings, the shell ring positioned at end, and the shell ring is by round tube, shell ring
End flange and bobbin upper and lower part adapter tube composition, each shell ring are sequentially connected via end flange；The import and export of the heat exchanger tube
It is connect respectively through valve with tube side fluid reservoir；The upper connecting tube of each shell ring of the shell is respectively through valve connection shell side flow point
Orchestration, shell side flow distributor are connect with shell side fluid reservoir, and the lower linking tube of each shell ring connects flow mixing device, shell side through valve respectively
Mixed flow orchestration is connect with shell side fluid reservoir.The heat-transfer character that can get real exchanger single heat exchange tube based on the device, into one
Step predicts shell-and-tube heat exchanger node temperature, to determine the node temperature of pipe for shell-and-tube exchanger journey and shell-side fluid.
But the invention is still based on single tube experiment, is not able to satisfy the requirement of tube bank attribute testing.
For example, Chinese Patent Application No. CN201510039037.X discloses a kind of separator tube bundles experiment dress
It sets and method.The experimental provision includes the heat-exchanging tube bundle experimental section of rectangular section, is successively welded on heat-exchanging tube bundle experiment pars infrasegmentalis
Lower rectangular section, entrance divergent segment and inlet connection, be successively welded on heat-exchanging tube bundle experimental section top upper rectangular section, outlet gradually
Contracting section and discharge connection, the experimental provision are connected by inlet connection and discharge connection with test pipe system；Under described
It is equipped with stainless steel cloth in rectangular section, is respectively symmetrically welded with a pair of of temperature measurement component in the lower rectangular section and upper rectangular section
With a pair of of manometric module.The device can outside separator pipe the actual high temperature and high pressure steam work with certain mass dryness fraction
Reheater tube bank heat exchange and pressure fall-off test and verifying are carried out under the conditions of work.But the invention can not carry out single-phase water and water phase accounting
Higher steam-water two-phase fluid local heat transfer, while horizontal tube bundle experiment can only be carried out, inclination tube bundles experiment can not be carried out.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is real that the present invention provides a kind of steam generator inclination tube bank heat exchange
Experiment device and method can carry out steam generator heat exchange tube beam Experimental Study of Heat Transfer Characteristics under the inclined operating condition of heat-transfer pipe.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of steam generator inclination tube bank local heat transfer device, including rectangle casing 6, are successively welded on rectangle casing 6
The entrance divergent segment 3 and inlet connection 1 of lower part are successively welded on the outlet converging transition 9 and discharge connection on 6 top of rectangle casing
10, the experimental provision is connected by inlet connection 1 and discharge connection 10 with test pipe system, inlet connection 1 and outlet
Thermocouple 2 is respectively welded on adapter tube 10；The rectangle casing 6 is by four rectangular steel plates i.e. the first rectangular steel plates 6-1, the second square
Shape steel plate 6-2, third rectangular steel plates 6-3 and the 4th rectangular steel plates 6-4 are welded, the first rectangular steel plates 6-1 and third
Rectangular steel plates 6-3 is the plane of symmetry, and corresponding rectangle short side, the second rectangular steel plates 6-2 and the 4th rectangular steel plates 6-4 are symmetrical
Face, corresponding rectangle long side；Corresponding position is provided with for heating tube bundle 8 on the first rectangular steel plates 6-1 and third rectangular steel plates 6-3
The through-hole of insertion is carved with screw thread, the corresponding through-hole line and the first rectangular steel plates 6-1 and third rectangular steel plates 6- inside through-hole
Angle between 3 long sides is 45 °, tilts tube bank using 8 model steam generator of heating tube bundle of inclination insertion；The rectangular sleeve
6 lower part of pipe is equipped with rectifying component 4；Corresponded on the second rectangular steel plates 6-2 position between heating tube bundle 8 and rectifying component 4 with
And the position between heating tube bundle 8 and outlet divergent segment 9 has a pressure port, is inserted into manometric module 5 in pressure port, uses
To measure the pressure of heating tube bundle inlet and outlet.
The surface of the experimental provision is provided with the insulating layer of preset thickness.
The heating tube bundle 8 is inserted into obliquely from 6 outside reserved through hole of rectangle casing, is passed through between upper part and through-hole
It is screwed, end plug 7 is disposed in lower through-hole, prevents working medium from flowing out, be connected through a screw thread between the end plug 7 and through-hole.
The heating tube bundle 8 takes the mode of interlaced arrangement, arranges 25 rows in total, and the heating tube bundle 8 divides for odd row
It restrains 8-1 and even rows restrains 8-2, the odd row tube bank 8-1 is by each semi-circular tube of three electrically heated rod 8-3 and both sides
It forms, arranges semi-circular tube on 6 inner wall of rectangle casing, it is therefore an objective to reduce the loss of bypass flow, even rows restrain the every row four of 8-2
Root electrically heated rod 8-3；The electrically heated rod 8-3 is single head electrically heated rod, is divided into intermediate bringing-up section region 8-3-1 and both ends
Cold section of region 8-3-2 is not heated；The 6th row of heating tube bundle and the tenth row are corresponded to from lower end number on the second rectangular steel plates 6-2
Position has a pressure port, is inserted into manometric module 5 in pressure port；Electrically heated rod among the odd row tube bank 8-1
Section circumferentially 4 centrosymmetric thermocouples 2 in its center；The thermocouple 2 is arranged in electrically heated rod inner wall, surveys
Inner wall surface thereof temperature is measured, eventually by the thermally conductive derivation of equation outside wall surface temperature of ring wall surface, it is therefore an objective to prevent multiple thermocouple from drawing
Line influences flowing.
The rectifying component 4 is porous plate rectifying component, including three rows totally 24 channels, it is therefore an objective to ensure to enter inclination heat exchanger tube
The axis parallel of the fluid flow direction and rectangle casing (6) in beam region.
The thermocouple 2 and manometric module 5 are connect with the data collection system of entire experimental provision, are inclined for steam generator
The analysis of inclined tube beam heat transfer characteristic provides experiment support.
A kind of experimental method of steam generator inclination tube bank local heat transfer device, the experimental provision are linked at
On the pipeline of pilot system, single-phase water or steam-water two-phase fluid of different temperatures and flow enter experiment by inlet connection 1
Device is rectified by rectifying component 4, flows through 8 region of heating tube bundle and heating tube bundle exchanges heat, then flow out from discharge connection 10；Stream
Body out temperature is measured by the thermocouple 2 for being mounted on entrance sleeve 1 and discharge connection 10, and fluid passes in and out heating tube bundle section
Pressure and pressure difference are measured by the manometric module 5 in insertion pressure port, and the data of thermoelectricity couple 2 and manometric module 5 are by test pipe
The data acquisition device of system records.
Compared to the prior art compared with the present invention has following advantages:
1, experimental provision of the present invention, the experiment invented to tilt tube bank heat exchange area feature for steam generator fill
It sets, is capable of the structure of reasonable model steam generator inclination tube bank, overall structure is simple, is easily worked, low in cost.
2, experimental provision of the invention can carry out the experiment of single-phase water, steam-water two-phase fluid, by changing working medium
Intake condition tilts tube bank heat transfer characteristic to steam generator and tests, and can obtain more detailed experimental data, thus
Tube bank heat transfer theory analysis is tilted for steam generator, and support is provided.
3, the heat-exchanging tube bundle experimental section of experimental provision of the present invention is both the core component of experimental provision, and can replace
Component；For different heat-exchanging tube bundles, method of the invention can be used, it is specific to design heat-exchanging tube bundle experimental section.
4, experimental provision of the invention using electrically heated rod simulation manage in high-temperature high pressure water as heat source medium, avoid for
The huge engineering and assembly difficulty for generating and controlling reliable high-temperature high pressure water heat source medium and need to face.
5, in experimental method of the present invention, using all heat transfer tube wall face temperature extrapolation heat exchanger tube outside wall surface temperature, no
But the average pipe outer wall face temperature of the outer average heat transfer coefficient of computer tube can be provided, and can provide analysis heat exchanger tube meet stream,
Experimental data needed for flow measurement, back stream spot temperature distribution character.
Detailed description of the invention
Fig. 1 is experimental provision entirety assembled front view of the present invention.
Fig. 2 is experimental provision entirety assembling side elevation of the present invention.
Fig. 3 is Fig. 1 along the direction A-A view.
Fig. 4 is Fig. 1 along the direction B-B view.
Fig. 5 is electrically heated rod schematic diagram.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples:
As shown in Figure 1, a kind of steam generator inclination tube bank local heat transfer device, including rectangle casing 6, successively it is welded on
The entrance divergent segment 3 and inlet connection 1 of 6 lower part of rectangle casing are successively welded on 9 He of outlet converging transition on 6 top of rectangle casing
Discharge connection 10, the experimental provision are connected by inlet connection 1 and discharge connection 10 with test pipe system, inlet connection
1 and discharge connection 10 on be respectively welded thermocouple 2；The rectangle casing 6 is by four rectangular steel plates i.e. the first rectangular steel plates 6-
1, the second rectangular steel plates 6-2, third rectangular steel plates 6-3 and the 4th rectangular steel plates 6-4 are welded, the first rectangular steel plates 6-
1 and third rectangular steel plates 6-3 is the plane of symmetry, corresponding rectangle short side, the second rectangular steel plates 6-2 and the 4th rectangular steel plates 6-4
For the plane of symmetry, corresponding rectangle long side；Corresponding position is provided with for adding on the first rectangular steel plates 6-1 and third rectangular steel plates 6-3
The through-hole that heat pipe bundle 8 is inserted into is carved with screw thread, the corresponding through-hole line and the first rectangular steel plates 6-1 and third square inside through-hole
Angle between shape steel plate 6-3 long side is 45 °；6 lower part of rectangle casing is equipped with rectifying component 4；Second rectangular steel plates
The position between heating tube bundle 8 and rectifying component 4 and the position difference between heating tube bundle 8 and outlet divergent segment 9 are corresponded on 6-2
It is provided with a pressure port, is inserted into manometric module 5 in pressure port, for measuring the pressure of test tube bank inlet and outlet.The heating tube
Beam 8 is inserted into obliquely from 6 outside reserved through hole of rectangle casing, is threadably secured between upper part and through-hole, lower through-hole
In be disposed with end plug 7, prevent working medium from flowing out, be connected through a screw thread between the end plug 7 and through-hole.
As shown in Fig. 2, the heating tube bundle 8 takes the mode of interlaced arrangement, 25 rows, four heating rods of every row are arranged in total
8-3；The heating tube bundle 8, which divides, restrains 8-1 and even rows tube bank 8-2 for odd row, and the odd row tube bank 8-1 is by three electricity
Each semi-circular tube of heating rod and both sides forms, and arranges semi-circular tube on 6 inner wall of rectangle casing, it is therefore an objective to reduce bypass flow
Loss, even rows restrain the every four electrically heated rod 8-3 of row of 8-2；The electrically heated rod 8-3 is single head electrically heated rod, is divided into heating
Section and does not heat cold section of region 8-3-2 at region 8-3-1；The 6th row of heat-exchanging tube bundle and the tenth row are corresponded on the rectangular steel plates 6-2
Position have a pressure port, manometric module 5 is inserted into pressure port；Heating rod among the odd row tube bank 8-1
Section circumferentially 4 centrosymmetric thermocouples 2 in its center.The thermocouple 2 is arranged in electrically heated rod inner wall, surveys
Inner wall surface thereof temperature is measured, eventually by the thermally conductive derivation of equation outside wall surface temperature of ring wall surface, it is therefore an objective to prevent multiple thermocouple from drawing
Line influences flowing.
As shown in figure 4, the rectifying component 4 is porous plate rectifying component, including three rows totally 24 channels, it is therefore an objective to ensure to enter
Tilt the axis parallel of the fluid flow direction and rectangle casing 6 in heat-exchanging tube bundle region.
As the preferred embodiment of the present invention, the outer surface of the experimental section is coated with insulating layer.
As shown in Figure 1, the experimental method of steam generator inclination tube bank local heat transfer device of the present invention, the experimental provision
Be linked on the pipeline of pilot system, single-phase water or steam-water two-phase fluid of different temperatures and flow by inlet connection 1 into
Enter experimental provision, rectified by porous plate rectifying component 4, flows through 8 region of heating tube bundle and heating tube bundle exchanges heat, then connect from outlet
Pipe 10 flows out；Fluid inlet and outlet temperature is measured by the thermocouple 2 for being mounted on entrance sleeve 1 and discharge connection 10, fluid disengaging
The pressure and pressure difference for restraining section are measured by the manometric module 5 in insertion pressure port, and the data of thermocouple 2 and manometric module 5 are by trying
Test the data acquisition device record of pipe-line system.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for the ordinary technical staff in the technical field of the invention, as long as
Within spirit of the invention, variation and modification to embodiment described above all be should be considered as in power of the invention
Within the scope of sharp claim.
Claims (7)
1. a kind of steam generator inclination tube bank local heat transfer device, it is characterised in that: including rectangle casing (6), successively weld
Entrance divergent segment (3) and inlet connection (1) in rectangle casing (6) lower part, are successively welded on the outlet on rectangle casing (6) top
Converging transition (9) and discharge connection (10), the experimental provision pass through inlet connection (1) and discharge connection (10) and test pipe system
System is connected, and is respectively welded thermocouple (2) on inlet connection (1) and discharge connection (10)；The rectangle casing (6) is by four
I.e. the first rectangular steel plates of rectangular steel plates (6-1), the second rectangular steel plates (6-2), third rectangular steel plates (6-3) and the 4th rectangular steel plates
(6-4) is welded, and first rectangular steel plates (6-1) and third rectangular steel plates (6-3) are the plane of symmetry, corresponding rectangle short side,
Second rectangular steel plates (6-2) and the 4th rectangular steel plates (6-4) are the plane of symmetry, corresponding rectangle long side；First rectangle steel
Corresponding position is provided with the through-hole for heating tube bundle (8) insertion on plate (6-1) and third rectangular steel plates (6-3), is carved with inside through-hole
Screw thread, the angle between the corresponding through-hole line and the first rectangular steel plates (6-1) and third rectangular steel plates (6-3) long side are
45 °, tube bank is tilted using heating tube bundle (8) model steam generator of inclination insertion；Rectangle casing (6) lower part is equipped with
Rectifying component (4)；Position and the heating between heating tube bundle (8) and rectifying component (4) are corresponded on second rectangular steel plates (6-2)
Tube bank (8) and the position exported between divergent segment (9) have a pressure port, are inserted into manometric module (5) in pressure port, use
To measure the pressure of heating tube bundle inlet and outlet.
2. a kind of steam generator inclination tube bank local heat transfer device according to claim 1, it is characterised in that: the reality
The surface of experiment device is provided with the insulating layer of preset thickness.
3. a kind of steam generator inclination tube bank local heat transfer device according to claim 1, it is characterised in that: described to add
Heat pipe bundle (8) is inserted into obliquely from the external reserved through hole of rectangle casing (6), is threadably secured between upper part and through-hole,
It is disposed with end plug (7) in lower through-hole, prevents working medium from flowing out, is connected through a screw thread between the end plug (7) and through-hole.
4. a kind of steam generator inclination tube bank local heat transfer device according to claim 1, it is characterised in that: described to add
Heat pipe bundle (8) takes the mode of interlaced arrangement, arranges 25 rows in total, the heating tube bundle (8) be divided into odd row tube bank (8-1) and
Even rows restrain (8-2), and the odd row tube bank (8-1) is by each semi-circular tube group of three electrically heated rods (8-3) and both sides
At arranging semi-circular tube on rectangle casing (6) inner wall, it is therefore an objective to reduce the loss of bypass flow, even rows restrain (8-2) every row
Four electrically heated rods (8-3)；The electrically heated rod (8-3) is single head electrically heated rod, is divided into intermediate bringing-up section region (8-3-1)
Cold section of region (8-3-2) is not heated with both ends；Heating tube bundle the 6th is corresponded to from lower end number on second rectangular steel plates (6-2)
The position of row and the tenth row have a pressure port, are inserted into manometric module (5) in pressure port；The odd row restrains (8-
1) intermediate electrically heated rod section circumferentially 4 centrosymmetric thermocouples (2) in its center；Thermocouple (2) cloth
It sets in electrically heated rod inner wall, inner wall surface thereof temperature is measured, eventually by the thermally conductive derivation of equation outside wall surface temperature of ring wall surface, mesh
Be to prevent excessive thermocouple lead from influencing flowing.
5. a kind of steam generator inclination tube bank local heat transfer device according to claim 1, it is characterised in that: described whole
Flowing part (4) is porous plate rectifying component, including three rows totally 24 channels, it is therefore an objective to ensure to enter the fluid in inclination heat-exchanging tube bundle region
The axis parallel of flow direction and rectangle casing (6).
6. a kind of steam generator inclination tube bank local heat transfer device according to claim 1, it is characterised in that: described
Thermocouple (2) and manometric module (5) are connect with the data collection system of entire experimental provision, are changed for steam generator inclination tube bank
The analysis of thermal characteristics provides experiment support.
7. a kind of experimental method of steam generator inclination tube bank local heat transfer device as claimed in any one of claims 1 to 6,
Be characterized in that: the experimental provision is linked on the pipeline of pilot system, the single-phase water or steam-water two of different temperatures and flow
Phase fluid enters experimental provision by inlet connection (1), rectifies by rectifying component (4), flows through heating tube bundle (8) region and heating
Tube bank heat exchange, then flows out from discharge connection (10)；Fluid inlet and outlet temperature is by being mounted on entrance sleeve (1) and discharge connection
(10) thermocouple (2) at measures, and the pressure and pressure difference that fluid passes in and out heating tube bundle section are by the manometric module in insertion pressure port
(5) it measures, the data of thermoelectricity couple (2) and manometric module (5) are recorded by the data acquisition device of test pipe system.
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