CN107664450B - A kind of electric heating coil heat pipe - Google Patents
A kind of electric heating coil heat pipe Download PDFInfo
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- CN107664450B CN107664450B CN201610608893.7A CN201610608893A CN107664450B CN 107664450 B CN107664450 B CN 107664450B CN 201610608893 A CN201610608893 A CN 201610608893A CN 107664450 B CN107664450 B CN 107664450B
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- heat
- lower collector
- upper header
- heat exchanger
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- 238000005485 electric heating Methods 0.000 title abstract description 8
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 230000005494 condensation Effects 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims abstract description 14
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims description 11
- 239000013529 heat transfer fluid Substances 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 235000021186 dishes Nutrition 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000010025 steaming Methods 0.000 claims 1
- 238000002207 thermal evaporation Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 18
- 238000002474 experimental method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003416 augmentation Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a kind of heat pipes, including lower collector pipe, upper header, coil pipe and return pipe, the coil pipe is connected with lower collector pipe and upper header, the lower collector pipe is evaporation ends, the condensation end includes at least part of upper header and coil pipe, and the fluid is in lower collector pipe interior suction thermal evaporation, after at least part of coil pipe and upper header are exchanged heat, it is condensed in upper header, the fluid of condensation returns to lower collector pipe by return pipe；Coil pipe is one or more, and each coil pipe includes more arc-shaped heat exchanger tubes, and the end connection of adjacent heat exchange tubes makes more heat exchanger tubes form cascaded structure, and the end of heat exchanger tube is made to form heat exchanger tube free end, and electric heater unit is arranged in the lower collector pipe.The present invention provides a kind of new-type electric heating heat pipes to be exchanged heat, be had wide range of applications using electric energy, achieve the purpose that environmental protection and energy saving by the way that electric heater unit is arranged in heat pipe.
Description
Technical field
The invention belongs to heat pipe field more particularly to a kind of coil pipe heat pipes.
Background technique
Hot pipe technique is George Ge Luofo of U.S. Los Alamos (Los Alamos) National Laboratory in 1963
One kind of (George Grover) invention is known as the heat transfer element of " heat pipe ", it takes full advantage of heat-conduction principle and phase transformation is situated between
The heat of thermal objects is transmitted to outside heat source rapidly by the quick thermal transport property of matter through heat pipe, and the capacity of heat transmission is more than to appoint
The capacity of heat transmission of what known metal.
The industries such as aerospace, military project were widely used in front of hot pipe technique, since being introduced into radiator manufacturing, so that
People change the mentality of designing of traditional heat sinks, get rid of the list for obtaining more preferable heat dissipation effect by high air quantity motor merely
One radiating mode makes radiator obtain satisfied heat transfer effect using hot pipe technique, opens heat dissipation industry new world.At present
Heat pipe is widely used in various heat exchange equipments, including nuclear power field, such as the UTILIZATION OF VESIDUAL HEAT IN of nuclear power etc..
Heat pipe in the prior art is all stationary state in heat transfer process, relies solely on the heat dissipation of condensation end of heat pipe, perhaps
Multiple bright improving also is only the improvement of the structure of the augmentation of heat transfer of condensation end.On the other hand, such heat pipe does not also use
Electric heating.
In view of the above-mentioned problems, the present invention provides a kind of new heat pipes, thus the heat exchange in the case where solving heat pipe heat exchanging
Coefficient is low and its non-uniform problem of heat exchange.
Summary of the invention
The present invention provides a kind of new heat pipes, to solve the technical issues of front occurs.
To achieve the goals above, technical scheme is as follows:
A kind of heat pipe, including lower collector pipe, upper header, coil pipe and return pipe, the coil pipe are connected with lower collector pipe and upper header
Logical, the lower collector pipe is evaporation ends, and the condensation end includes at least part of upper header and coil pipe, and the fluid is in next part
Pipe interior suction thermal evaporation condenses in upper header after at least part of coil pipe and upper header are exchanged heat, the fluid of condensation
Lower collector pipe is returned to by return pipe；Coil pipe is one or more, and each coil pipe includes more arc-shaped heat exchanger tubes, adjacent to change
The end of heat pipe is connected to, and more heat exchanger tubes is made to form cascaded structure, and the end of heat exchanger tube is made to form heat exchanger tube free end.
Preferably, the center line of more arc-shaped heat exchanger tubes is the circular arc of concentric circles.
Preferably, the position of return pipe connection lower collector pipe and the both side ends of upper header.
Preferably, the concentric circles is using the center of the cross section of upper header as the circle in the center of circle.
Preferably, the caliber of the lower collector pipe is less than the caliber of upper header.
Preferably, the internal diameter of lower collector pipe is R1, the internal diameter of upper header is R2, then 0.45 < R1/R2 < 0.88.
Preferably, the coil pipe be it is multiple, the multiple coil pipe be parallel-connection structure.
Preferably, the distance between adjacent heat exchange tubes are increasing as the center apart from lower collector pipe is remoter.
Preferably, the internal diameter of lower collector pipe is R1, the internal diameter of upper header is R2, and the outer diameter of heat exchanger tube is D, adjacent heat exchange tubes
The distance of center line be L, meet following relationship:
10*(R1/R2)=a-b*Ln (5*D/L), wherein Ln is logarithmic function, and a, b are coefficients,
Wherein 17.03 < a < 18.12,9.15 <b < 10.11；
55mm<R1<100mm；95mm<R2<145mm；
25mm<D<80mm；40mm<L<120mm；
0.45<R1/R2<0.84；
0.5<D/L<0.7。
Preferably, a=17.54, b=9.68.
Compared with prior art, plate heat exchanger of the invention and its heat exchange tube wall have the advantage that
1) the present invention provides a kind of new-type electric heating heat pipes to utilize electric energy by the way that electric heater unit is arranged in heat pipe
It exchanges heat, avoids single and its heat source the limitation of the application range of conventional heat pipe, so that the application field of heat pipe is more
Extensively, it can achieve the purpose that environmental protection and energy saving, improve the utilization efficiency of heat pipe.
2) by setting control device, so that can more meet actual needs in the use process of heat pipe, user can
To control the application temperature of heat pipe as needed, can not the carrying out temperature control well of conventional heat pipe is avoided and the mistake that generates
Heat or surfusion, are furthermore achieved the automation of heat pipe equipment and its popularity of application field.
3) by the heating power of setting electrically heated rod and its variation of structure size, heating effect is further improved
Rate improves the heat exchange efficiency of heat pipe.
4) present invention firstly provides the heat pipe structures of coiled, also, by setting coil pipe, meeting after heat exchanging fluid is heated
Volume expansion is generated, induction coil pipe free end generates vibration.So that surrounding fluid forms further flow-disturbing, further strengthen
Heat transfer.
5) distance change of center line of the present invention to the pipe diameter size and tube spacing of coil heat exchange pipe apart from lower collector pipe
Setting, further improve the heat transfer effect of heat pipe.
6) present invention optimizes the best relation of the parameter of heat pipe, to further increase heat exchange by largely testing
Efficiency.
Detailed description of the invention
Fig. 1 is heat-pipe apparatus front schematic view.
Fig. 2 is the Section A-A view in Fig. 1.
Fig. 3 is the scale diagrams of Fig. 2 structure.
Fig. 4 is the structural schematic diagram of the setting electric heater unit of Fig. 1.
Fig. 5 is the structural schematic diagram optimized in Fig. 4.
Fig. 6 is the structural schematic diagram of the electric heater unit of parabolic sectional shape.
In figure: 1, lower collector pipe, 2, upper header, 3, coil pipe, 4, heat exchanger tube, 5, return pipe, 6, free end, 7, free end, 8,
Electric heater unit, 9 vacuum evacuation devices, 10 power supplys.
Specific embodiment
Specific embodiments of the present invention will be described in detail with reference to the accompanying drawing.
Herein, if without specified otherwise, it is related to formula, "/" indicates that division, "×", " * " indicate multiplication.
As shown in Fig. 1, a kind of heat pipe, including lower collector pipe 1, upper header 2, coil pipe 3 and return pipe 5, the coil pipe 3 is under
Collector 1 is connected with upper header 2, and the lower collector pipe 1 is evaporation ends, the condensation end include upper header 2 and coil pipe 3 at least
A part, the fluid is in 1 interior suction thermal evaporation of lower collector pipe, after at least part of coil pipe 3 and upper header 2 are exchanged heat,
It is condensed in upper header 2, the fluid of condensation returns to lower collector pipe 1 by return pipe 5.
Preferably, coil pipe 3 is one or more, for example, Fig. 1 illustrates multiple coil pipes 3.
As shown in Figure 1, upper header 2 is located at the top of lower collector pipe 1.
As shown in Fig. 2, each coil pipe 3 includes more arc-shaped heat exchanger tubes 4, the end of adjacent heat exchange tubes 4 is connected to, makes more
Root heat exchanger tube 4 forms cascaded structure, and the end of heat exchanger tube 4 is made to form heat exchanger tube free end 6,7.
Heat pipe exchanges heat when being worked, through upper header 2 and coil pipe 3 with other fluids.Other fluids can be with
Only a part with coil pipe 3 exchanges heat, such as the part of the coil pipe 3 connecting with lower collector pipe 1 in Fig. 2 is not involved in heat exchange.
Preferably, being not involved in the part of heat exchange is insulation end.I.e. heat pipe includes evaporation ends, condensation end and insulation at this time
End, wherein evaporation ends are lower collector pipes 1, and insulation end is a part for the coil pipe 3 connecting with lower collector pipe 1, and rest part is condensation end.
Preferably, only regarding lower collector pipe 1 as evaporation ends, upper header 2 and coil pipe are not insulated end as condensation end.
The present invention provides a kind of heat pipes of new structure can generate volume after heat exchanging fluid is heated by the way that coil pipe is arranged
Expansion, so that steam is formed, and the volume of steam is far longer than water, therefore the steam formed can carry out quick washing in coil pipe
The flowing of formula.Because of volume expansion and the flowing of steam, 1 free end 6,7 of coil pipe can be induced to generate vibration, heat exchanger tube is free
The vibration is transferred to heat exchanging fluid around during vibration by end 6,7, and fluid can also generate disturbance between each other, to make
Heat exchanging fluid around obtaining forms flow-disturbing, boundary layer is destroyed, to realize the purpose of augmentation of heat transfer.
It is found through experiments that, the heat pipe for being constantly in static condition compared with the existing technology, heat exchange efficiency improves 25-
35%.
Preferably, the lower collector pipe 1, upper header 2 and coil pipe 3 are all circular tube structures.
Preferably, return pipe 5 connects the position of the both side ends of lower collector pipe 1 and upper header 2.Guarantee fluid upper in this way
Flow path in collector 2 is long, can further increase heat-exchange time, improves heat exchange efficiency.
Preferably, heat exchanger tube 4 is elastic heat exchanger tube.Elastic heat exchanger tube is arranged in heat exchanger tube 4, can be further increased certainly
By the flow-disturbing held, the coefficient of heat transfer can be further improved.
Preferably, the center line of more arc-shaped heat exchanger tubes 4 is the circular arc of concentric circles.
Preferably, the concentric circles is using the center of upper header 2 as the circle in the center of circle.I.e. the heat exchanger tube 4 of coil pipe 3 around
The center line of upper header 2 is arranged.
As shown in Fig. 2, heat exchanger tube 4 not instead of one is completely justified, an oral area is reserved, to form oneself of heat exchanger tube
By holding.Angle where the circular arc of the oral area is 70-120 degree, i.e. the sum of Fig. 3 angle b and c is 70-120 degree.
Preferably, the caliber of the lower collector pipe 1 is less than the caliber of upper header 2.
The internal diameter of lower collector pipe is R1, and the internal diameter of upper header is R2, as preferably then 0.45 < R1/R2 < 0.88.
By above-mentioned setting, can further augmentation of heat transfer, improve the heat exchange efficiency of 8-15%.
Preferably, the distance between adjacent heat exchange tubes 4 are increasing as the center apart from upper header 2 is remoter.Such as
As shown in Fig. 2, along upper header 2 center be the center of circle radial direction, the distance between heat exchanger tube BC be greater than AB between away from
From the distance between heat exchanger tube CD is greater than the distance between BC.
Preferably, the increasing amplitude of the distance between adjacent heat exchange tubes 4 constantly increases.
It is preferably provided with by above-mentioned, can be further improved heat exchange efficiency, increase the uniformity of the heat distribution of heat exchange.
It is found through experiments that, the heat exchange efficiency of 8-12% can be improved by above-mentioned setting.
Preferably, the diameter of heat exchanger tube 4 is increasing as the center apart from upper header 2 is remoter.
Preferably, the increasing amplitude of the diameter of heat exchanger tube 4 constantly increases.
It is preferably provided with by above-mentioned, can be further improved heat exchange efficiency, increase the uniformity of heat exchange.It is sent out by experiment
It is existing, 10% or so heat exchange efficiency can be improved by above-mentioned setting.
Preferably, as shown in Figure 1, the coil pipe 4 be it is multiple, the multiple coil pipe 4 be parallel-connection structure.
In experiments it is found that the distance between lower collector pipe 1, upper header 2 and heat exchanger tube 4 relationship can exchange the thermal efficiency with
And uniformity has an impact.If distance is excessive between heat exchanger tube 4, heat exchange efficiency is too poor, and the distance between heat exchanger tube 4 is too
Small, then the distribution of heat exchanger tube 4 is too close, also will affect heat exchange efficiency, the liquid that the pipe diameter size influence of collector and heat exchanger tube accommodates
Or the volume of steam, then the vibration of free end 6,7 can be had an impact, to influence to exchange heat.Therefore lower collector pipe 1, upper collection
The distance between the size of the caliber of pipe 2 and heat exchanger tube 4 have certain relationship.
The present invention is the optimal size relationship summed up by the test data of the heat pipe of multiple and different sizes.From heat exchange
Heat exchange amount maximum in effect is set out, and nearly 200 kinds of forms are calculated.The size relationship is as follows:
The internal diameter of lower collector pipe is R1, and the internal diameter of upper header is R2, and the outer diameter of heat exchanger tube is D, the center line of adjacent heat exchange tubes
Distance be L, meet following relationship:
10*(R1/R2)=a-b*Ln (5*D/L), wherein Ln is logarithmic function, and a, b are coefficients,
Wherein 17.03 < a < 18.12,9.15 <b < 10.11；
55mm<R1<100mm；95mm<R2<145mm；
25mm<D<80mm；40mm<L<120mm；
0.45<R1/R2<0.88；Preferably 0.5-0.8, further preferably 0.59 < R1/R2 < 0.71；
0.5<D/L<0.7；It is preferred that 0.58 < D/L < 0.66.
Preferably, 17.32 < a < 17.72,9.45 <b < 9.91；
Further preferably, a=17.54, b=9.68.
Preferably, the quantity of heat exchanger tube be 3-5 root, preferably 3 or 4.
Preferably, the numerical value of a constantly increases with the increase of R1/R2, the numerical value of b constantly reduces.By this
Variation, so that the structural parameters of heat pipe more optimize rationally, the data of calculating are more accurate.
The distance of 2 center line of lower collector pipe 1 and upper header is 320-380mm；Preferably 340-360mm.
Preferably, the radius of heat exchanger tube is preferably 10-40mm；Preferably 15-35mm, further preferably 20-
30mm。
If the diameter of adjacent heat exchanger tube is different, the diameter D value of heat exchanger tube is being averaged for adjacent heat exchanger tube diameter
Value.
Further preferably, the center line of same coil heat exchange pipe 4 is in the same plane.Preferably, the plane is hung down
The plane formed as the center line of lower collector pipe 1 and upper header 2.Preferably, what the center line of different coil heat exchange pipes 4 was formed
Plane is parallel to each other.
Further preferably, the distance between adjacent coil pipe 3 is 2.8-3.6 times of 4 outer dia of coil heat exchange pipe.Adjacent disc
The distance between pipe 3 is calculated with the distance between plane where the center line of coil heat exchange pipe 4.
Further preferably, if coil heat exchange pipe diameter is different, the average value of the diameter of the heat exchanger tube of same coil pipe is taken
As the average diameter of coil pipe.Such as the average value of heat pipe A-D is taken shown in Fig. 2.Then two adjacent coil pipes 3 is straight
Diameter average value calculates the distance of adjacent coil pipe.
Preferably, end part aligning of the heat exchanger tube in the free end 6,7 of the same side, in the same plane, end is prolonged
Middle line of the long line (or plane where end) Jing Guo lower collector pipe 1, as shown in Figure 3.
Preferably, as shown in Fig. 2, the first end of the inside heat exchanger tube of coil pipe 3 is connect with upper header 2, second end and phase
Adjacent outside heat exchanger tube one end connection, one end of the outermost heat exchanger tube of coil pipe 3 are connect with lower collector pipe 1, adjacent heat exchanger tube
End connection, to form a concatenated structure.
Preferably, the plane where the line at the center of lower collector pipe 1 and upper header 2 is vertical direction.
As shown in figure 3, the folder that the plane where first end 6 is formed with the plane where 2 center line of lower collector pipe 1 and upper header
Angle c is 40-65 degree.
The angle b that the plane where plane and 2 center line of lower collector pipe 1 and upper header where second end 7 is formed is 55-
65 degree.
By the design of above-mentioned preferred angle, so that the vibration of free end reaches most preferably, so that heat exchange efficiency reaches
To optimal.
As shown in Fig. 2, the heat exchanger tube 4 of coil pipe is 4, heat exchanger tube A, B, C, D connection.Certainly, four are not limited to, it can be with
It is set as needed multiple, specific connection structure is identical as Fig. 2.
The coil pipe 3 be it is multiple, multiple floating coiled pipes 1 independently connect lower collector pipe 1 and upper header 2, i.e., multiple floatings
Coil pipe 1 is parallel-connection structure.
It is an object of the present invention to provide an electrically heated heat pipes, such as Figure 4-Figure 6.
Lower collector pipe 1, upper header 2 and the coil pipe 3 of heat pipe constitute the channel of fluid circulation.It is provided with and is taken out very on upper header 2
The inner cavity of lower collector pipe 1, upper header 2 and coil pipe 3 is evacuated by vacuum orifice pipe 9, then passes through pumping by blank pipe 9, vacuum pump
Vacuum tube 9 pours into suitable heat-transfer fluid, and heat-transfer fluid is finally flowed into lower collector pipe 1.Injection rate to heat-transfer fluid reaches
After normal capacity, then vacuum-pumping tube 9 is sealed.
Preferably, electric heater unit 8 is arranged in the lower collector pipe 1, heated using electric heating feeder apparatus 8 in lower collector pipe 1
Fluid.The fluid absorbs electric heating evaporation in lower collector pipe 1, exchanges heat by least part and upper header 2 of coil pipe 3
Afterwards, it is condensed in upper header 2, the fluid of condensation returns to lower collector pipe 1 by return pipe 5.
Preferably, 8 cross section of electric heater unit is preferably circular.
Preferably, electric heater unit 8 is electrically heated rod.
Preferably, the electric heater unit 8 is located at the medium position of lower collector pipe 1 hereinafter, the i.e. described electric heater unit position
Position between the medium position and bottom of lower collector pipe.
Preferably, the center line of the electric heater unit 8 is in the pipe of lower collector pipe 1 at a distance from the center line of lower collector pipe
The 1/4-1/3 of radius.
It is found through experiments that, this position can reach the optimal of heating effect, to reach the optimal of heat transfer effect.
Preferably, the heat pipe further includes temperature control system, the temperature control system is for controlling in heat pipe
Vapor (steam) temperature.Temperature sensor is set in the coil pipe 3, for measuring the temperature of the steam generated in coil pipe.Heating rod is powered
Heating, heated rear fluid are atomized rapidly under vacuum conditions, riddle each coil pipe, upper header, lower collector pipe.When temperature sensor is surveyed
The temperature of amount reaches scheduled first temperature, and temperature controller controls heater stop heating, when temperature sensor measurement
Temperature is lower than scheduled second temperature, and temperature controller control heating rod is heated.
Preferably, first temperature is identical with second temperature.
Preferably, the first temperature is higher than 5-20 degrees Celsius of second temperature.Preferably 8-13 degrees Celsius.
Preferably, the electric heater unit is from the middle part (such as position M in Fig. 5) of lower collector pipe 1 to the two of lower collector pipe
It holds (such as position E, F in Fig. 5), heating power is constantly reduced.That is 8 medium position heating power highest of electric calorifie installation, two
The heating power at end is minimum.
Preferably, from the middle part of lower collector pipe 1 to the both ends of lower collector pipe, the heating power of electric heater unit is constantly reduced
Amplitude it is increasing.
By the design of above-mentioned optimization, heat exchange efficiency can be further improved.It is found through experiments that, passes through above-mentioned setting
Heat exchange efficiency can be improved.
Preferably, the electric heater unit 8 divides for multistage, from the middle part (such as position M in Fig. 5) of lower collector pipe 1 to
The heating power at the both ends (such as position E, F in Fig. 5) of lower collector pipe, the electric heater unit of the difference section is constantly reduced.
I.e. 8 medium position heating power highest of electric calorifie installation, the heating power at both ends are minimum.
Preferably, the heating power of the electric heater unit of different sections is not from the middle part of lower collector pipe 1 to the both ends of lower collector pipe
The amplitude of disconnected reduction is increasing.
It is on the one hand easy to process by the design of above-mentioned optimization, it can be further improved heat exchange efficiency.It is sent out by experiment
It is existing, 15% or so heat exchange efficiency can be improved by above-mentioned setting.
Fig. 5 illustrates electric heater unit 8 and divides structure for multistage.
The electric heater unit is by the way of resistance heating.
Preferably, the electric heater unit is rod resistance.Preferably, quantity is one or more.
Preferably, the electric heater unit is resistance wire.Preferably, quantity is one or more.
Preferably, the electric heater unit (as one or more preferred rod resistance or one or more
Resistance wire) from the middle part of lower collector pipe 1 to the both ends of lower collector pipe, the outer diameter of electric heater unit is increasing, i.e., electric heater unit is got over
Come thicker.That is electric calorifie installation medium position is most thin, both ends it is most thick.Such as shown in Figure 5,6, by above-mentioned optimal setting,
The heating power for reaching electric heater unit different location is different, to improve electrically heated efficiency.
Preferably, the amplitude that electric heater unit outer diameter becomes larger is increasingly from the middle part of lower collector pipe 1 to the both ends of lower collector pipe
Greatly.
Change by using outer diameter, so that intermediate resistance is maximum, heat generation rate is maximum, so that fluid evaporator, is opened to both ends
It originates heating rate to gradually decrease, cold fluid is flowed down from both ends, to improve the heat exchange efficiency of heat pipe.
It is found through experiments that, by above-mentioned optimal setting, so that electrically heated utilization efficiency highest, so that heat pipe reaches
Optimal electric heating utilization efficiency, can be improved 10% or so heat utilization efficiency.
Preferably, the outer shape of electric heater unit is parabolical shape, as shown in Figure 6.
Preferably, fluid is water.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel can make various changes or modifications, therefore protection scope of the present invention is answered without departing from the spirit and scope of the present invention
When being defined by the scope defined by the claims..
Claims (3)
1. a kind of heat pipe, including lower collector pipe, upper header, coil pipe and return pipe, the coil pipe are connected with lower collector pipe and upper header,
The lower collector pipe is evaporation ends, and condensation end includes at least part of upper header and coil pipe, and fluid absorbs heat steaming in lower collector pipe
Hair, after at least part of coil pipe and upper header are exchanged heat, condenses, the fluid of condensation passes through return pipe in upper header
Return to lower collector pipe；Coil pipe is one or more, and each coil pipe includes more arc-shaped heat exchanger tubes, the end of adjacent heat exchange tubes
Connection makes more heat exchanger tubes form cascaded structure, and the end of heat exchanger tube is made to form heat exchanger tube free end, the lower collector pipe
Middle setting electric heater unit；The center line of more arc-shaped heat exchanger tubes is the circular arc of concentric circles；The concentric circles is the above collection
The center of the cross section of pipe is the circle in the center of circle；
The internal diameter of lower collector pipe is R1, and the internal diameter of upper header is R2, and the outer diameter of heat exchanger tube is D, the center line of adjacent heat exchange tubes away from
From being L, meet following relationship:
10*(R1/R2)=a-b*Ln (5*D/L), wherein Ln is logarithmic function, and a, b are coefficients,
Wherein 17.03 < a < 18.12,9.15 <b < 10.11；
55mm<R1<100mm；95mm<R2<145mm；
25mm<D<80mm；40mm<L<120mm；
0.45<R1/R2<0.88；
0.5<D/L<0.7。
2. heat pipe as described in claim 1, which is characterized in that the electric heater unit is electrically heated rod.
3. heat pipe as described in claim 1, which is characterized in that be provided with vacuum-pumping tube on upper header, vacuum pump is true by taking out
It eats dishes without rice or wine pipe, the inner cavity of lower collector pipe, upper header and coil pipe is evacuated, suitable heat transfer stream is then poured by vacuum-pumping tube
Body, heat-transfer fluid are finally flowed into upper header, after the injection rate of heat-transfer fluid reaches normal capacity, then by vacuum-pumping tube into
Row sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608893.7A CN107664450B (en) | 2016-07-29 | 2016-07-29 | A kind of electric heating coil heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610608893.7A CN107664450B (en) | 2016-07-29 | 2016-07-29 | A kind of electric heating coil heat pipe |
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| Publication Number | Publication Date |
|---|---|
| CN107664450A CN107664450A (en) | 2018-02-06 |
| CN107664450B true CN107664450B (en) | 2019-03-05 |
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| CN201610608893.7A Expired - Fee Related CN107664450B (en) | 2016-07-29 | 2016-07-29 | A kind of electric heating coil heat pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108801010B (en) * | 2018-03-09 | 2020-03-17 | 青岛吉云德和商贸有限公司 | Loop heat pipe steam generator with large heat exchange area |
| CN109631642B (en) * | 2019-01-29 | 2020-06-16 | 青岛佰腾科技有限公司 | Liquid medicine electric heating loop heat pipe for heating fumigation |
| CN109654927B (en) * | 2019-01-29 | 2020-03-17 | 青岛吉云德和商贸有限公司 | Optimization design method of loop heat pipe for heating medicament liquid |
| CN112665447B (en) * | 2019-10-15 | 2022-04-22 | 国网山东省电力公司潍坊供电公司 | Temperature descaling control method |
| CN112665425B (en) * | 2019-10-15 | 2022-03-15 | 山东大学 | Shell-and-tube heat exchanger with multi-tube box water level difference control |
| CN112665448B (en) * | 2019-10-15 | 2022-06-24 | 国网山东省电力公司潍坊供电公司 | Flow velocity vibration control method for heat exchanger |
| CN112665426B (en) * | 2019-10-15 | 2022-06-21 | 山东大学 | Shell-and-tube heat exchanger of many casees pressure difference control |
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| CN101738129A (en) * | 2009-12-10 | 2010-06-16 | 山东大学 | Vibration inducing device for strengthening heat exchange of elastic tube bundle heat exchanger |
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| CN2466594Y (en) * | 2001-02-27 | 2001-12-19 | 天津宝成集团有限公司 | Flexible tube bundle steam-water (water-water) heat exchanger |
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| CN101738129A (en) * | 2009-12-10 | 2010-06-16 | 山东大学 | Vibration inducing device for strengthening heat exchange of elastic tube bundle heat exchanger |
| CN102954719A (en) * | 2011-08-26 | 2013-03-06 | 陕西桥上桥锅炉容器制造有限责任公司 | Integrated heat pipe |
| CN104791892A (en) * | 2013-10-16 | 2015-07-22 | 中北大学 | Vacuum tube radiator |
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