CN109654927A - A kind of optimum design method of electric heating loop circuit heat pipe - Google Patents
A kind of optimum design method of electric heating loop circuit heat pipe Download PDFInfo
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- CN109654927A CN109654927A CN201910086119.8A CN201910086119A CN109654927A CN 109654927 A CN109654927 A CN 109654927A CN 201910086119 A CN201910086119 A CN 201910086119A CN 109654927 A CN109654927 A CN 109654927A
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- evaporation
- heating element
- electric heating
- loop circuit
- heat pipe
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- 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
- F28D15/04—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 with tubes having a capillary structure
-
- 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
- F28D15/0266—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 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
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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)
- Physical Or Chemical Processes And Apparatus (AREA)
- Resistance Heating (AREA)
Abstract
The present invention provides a kind of optimum design methods of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid absorbs heat in evaporation part and evaporates, enter condensation part heat release by riser portions, then evaporation part is returned to by falling portion, the evaporation part includes electric heating element, and the power of electric heating element takes following method to design: the center apart from evaporation part is remoter, then the heating power of the electric heating element of unit length is bigger on evaporation tube extending direction.The present invention provides a kind of loop circuit heat pipe optimum design method of Novel structure, and the rule by heating power apart from evaporation part center designs, and can further improve heating efficiency.
Description
Technical field
The present invention relates to a kind of loop circuit heat pipes, more particularly, to a kind of electrically heated loop circuit heat pipe.
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 can use a variety of heat pipes, including solar energy, fume afterheat or other thermal energy in the prior art, can also
To use electric energy.But in the case where using electric energy, be generally employed alone in evaporation part and electric heating element is simply set, but
It is that electrical heating efficiency is lower in such cases, the prior art does not take specific structure or corrective measure to further increase
Heating efficiency.
In view of the above-mentioned problems, the present invention is improved on the basis of invention in front, a kind of new loop heat is provided
Pipe, thus in the case where solving the problems, such as loop circuit heat pipe heating existing heating is uneven, heating efficiency is low.The present invention is in pipe
Interior setting heating fluid flow heating element flows the shape of heating element by setting fluid, so that fluid is in evaporation tube
It is sufficiently heated, improves heat transfer effect.
Summary of the invention
The object of the present invention is to provide a kind of loop circuit heat pipes of Novel structure, pass through this kind of structure loop circuit heat pipe, Neng Goushi
Existing heating in the case where existing loop circuit heat pipe heating is uneven.The low problem of heating efficiency.
To achieve the goals above, technical scheme is as follows:
A kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid
Body absorbs heat in evaporation part and evaporates, and enters condensation part heat release by riser portions, then returns to evaporation part, the evaporation by falling portion
Portion includes electric heating element, which is characterized in that the power of electric heating element takes following method to design: the center apart from evaporation part
Remoter, then the heating power of the electric heating element of unit length is bigger on evaporation tube extending direction.
Preferably, the center apart from evaporation part is remoter, then on evaporation tube extending direction unit length electric heating element
The bigger amplitude of heating power constantly increase.
A kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, institute
It states liquid and absorbs heat in evaporation part and evaporate, enter condensation part heat release by riser portions, evaporation part is then returned to by falling portion, it is described
Evaporation part includes electric heating element, which is characterized in that loop circuit heat pipe takes following method to design: the evaporation tube is taken along steaming
The direction of the flowing of tube fluid is sent out, the caliber of evaporation tube constantly becomes larger.
Preferably, the direction of the flowing along evaporation tube fluid, the caliber of evaporation tube 6 constantly get over by increased amplitude
Come bigger.
A kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, institute
It states liquid and absorbs heat in evaporation part and evaporate, enter condensation part heat release by riser portions, evaporation part is then returned to by falling portion, it is described
Evaporation part includes electric heating element, which is characterized in that the distance of distance evaporation tube inlet is K1, adjacent fluid flow heating element
Between spacing be S, S=T1(K1), i.e. S is using distance K1 as the function of variable, and S ' is the first order derivative of S, and satisfaction is wanted as follows
It asks:
S’<0。
Preferably, i.e. S " is the second derivative of S, meet following require:
S”>0。
A kind of optimum design method of loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid
It absorbs heat and evaporates in evaporation part, enter condensation part heat release by riser portions, evaporation part, the evaporation part are then returned to by falling portion
Including electric heating element, which is characterized in that the same electrically heated rod in the same fluid flowing heating element is divided into multistage, edge
Fluid flow direction in evaporation tube, the heating power of the unit length of different sections it is different；Wherein along evaporation tube fluid stream
Dynamic direction, the heating power of the unit length of different sections constantly increase.
Preferably, increased amplitude constantly increases.
A kind of optimum design method of loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid
It absorbs heat and evaporates in evaporation part, enter condensation part heat release by riser portions, evaporation part, the evaporation part are then returned to by falling portion
Including electric heating element, which is characterized in that the side length of regular quadrangle is K2, and fluid flows the side in heating element regular quadrangle section
A length of B2, meet following require: with the increase of B2, K2 is also continuously increased.
Preferably, the ever-increasing amplitude of K2 is smaller and smaller with the increase of B2.
Compared with prior art, of the invention to have the advantage that
1) present invention provides a kind of loop circuit heat pipe optimum design method of Novel structure, by heating power apart from evaporation part center
Rule design, can further improve heating efficiency.
2) present invention devises a kind of loop circuit heat pipe of the fluid flowing heating element of Novel structure, and in loop circuit heat pipe
Fluid, which flows, is arranged heating element in heating element, by such structure, can be realized and quickly provide hot fluid, and the loop
Heat pipe have the function of heating rapidly, it is uniformity of temperature profile, safe and reliable, improve heating efficiency.
3) the heating function in the direction that the present invention is flowed in evaporation tube along fluid by heating element in setting evaporation tube
The variation of rate further improves homogeneous heating degree and heating efficiency.
4) present invention devise evaporation tube fluid flowing heating element along in evaporation tube along fluid flow side
Rule distribution to interval, can further improve heating efficiency.
5) present invention devises heating element heating power different in evaporation tube along the variation of evaporation tube length direction,
The security performance and heating properties of device can be further increased.
6) present invention passes through numerical simulation and many experiments, it is determined that the optimal ratio of the electrical heating power of different layers is closed
System, further improves homogeneous heating degree and heating efficiency, and also the design for the evaporation tube of such structure provides one most preferably
Reference frame.
7) present invention passes through numerical simulation and many experiments, it is determined that fluid flows the optimal of each size of heating element
Relationship further improves homogeneous heating degree and heating efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of loop circuit heat pipe of the invention；
Fig. 2 is that the fluid flowing heating element of loop circuit heat pipe of the invention is spaced apart structural schematic diagram；
Fig. 3 is evaporation pipe fluid flowing heating element Structure of cross section schematic diagram.
Fig. 4 is Fig. 3 evaporation tube fluid flowing heating element Section A-A schematic diagram.
Fig. 5 is evaporation tube transverse direction section schematic diagram.
Fig. 6 is the schematic diagram that separating device of the present invention is arranged in evaporation tube.
Appended drawing reference is as follows: evaporation part 1, riser portions 2, condensation part 3, falling portion 4, and fluid flows heating element 5, evaporation tube
6, heating element 7, power supply 8, diamond shape through-hole 51, octagon through-hole 52, side 53, shell 61, main element 62.
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.
A kind of loop circuit heat pipe as shown in Figure 1, the loop circuit heat pipe include evaporation part 1, condensation part 3, riser portions 2 and decline
Portion 4, the liquid absorb heat in evaporation part 1 and evaporate, and enter 3 heat release of condensation part by riser portions 2, are then returned to by falling portion 4
Evaporation part 1, the evaporation part 1 include electric heating element 7, and the evaporation part includes evaporation tube 6 and the stream that is arranged in evaporation tube
Body flows heating element 5, and the fluid flowing heating element 5 is upwardly extended in the side that evaporation tube 6 extends；The fluid flowing adds
Thermal part 5 includes shell 61 and the intracorporal main element 62 of shell, and the main element 62 is that diamond shape through-hole 51 and octagon are logical
Hole 52 forms, and the side length of the diamond shape through-hole 51 is equal to the side length of octagon through-hole 52, four sides of the diamond shape through-hole 51
It is the side of four different octagon through-holes 52 respectively, four mutual unconnected sides 53 that octagon leads to 52 holes are respectively
The side of four different diamond shape through-holes；The electric heating element 7 is arranged in diamond shape through-hole 51.Four angles of diamond shape through-hole are all
90 degree, i.e. this diamond shape is regular quadrangle.
The present invention passes through the loop circuit heat pipe that new-type electric heating device is arranged, which is evenly distributed on heating element
Around multiple octagon channel, fluid is entered in octagon channel and is uniformly heated by heating element,
By such structure, it can be can be realized by a device and the hot fluid of different temperatures is quickly provided, and the loop circuit heat pipe
Have the function of heating rapidly, it is uniformity of temperature profile, safe and reliable, improve heating efficiency.
Preferably, the evaporation tube 6 is arranged in the horizontal direction.
Preferably, the outer tube of evaporation tube is exactly the outside wall surface of fluid flowing heating element.Preferably, evaporation tube and stream
It is to be integrated that body, which flows heating element,.
Preferably, the cross section of the evaporation tube 6 is regular quadrangle.
Preferably, the heating element is resistance heater.
Preferably, insulating layer is arranged outside evaporation tube 1.
Preferably, capillary structure is arranged in falling portion 4.By the way that capillary structure is arranged, liquid is promoted to enter evaporation as early as possible
Portion.
Preferably, liquid is, ammonium hydroxide, methanol, acetone or heptane.
Preferably, condensation part is arranged in cabinet, insecticide liquid is set, such as smokes and wash the medical fluid used in cabinet.With
It is smoked in heating and washes the medical fluid used.
Preferably, groove is arranged in 6 inner wall of evaporation tube, the outside wall surface setting of the fluid flowing heating element 5 exists
In groove.By the way that the fastness that can be further improved fluid and flow heating element installation is arranged such.
Preferably, evaporation tube 6 is welded for multi-segment structure, the junction setting fluid of multi-segment structure flows heating part
Part 5.By so set, easy to process, saving cost can be made.
Preferably, the heating element 7 is resistance heater.
Preferably, resistance heater 7 fills entire regular quadrangle channel.It can guarantee heating element by being arranged such
It is contacted with the wall surface in regular quadrangle channel, further increases heating efficiency.
Preferably, the center of the centre distance fluid flowing heating element 5 of diamond shape through-hole is remoter, then evaporation tube extension side
The heating power of the resistance heater of upward unit length is bigger.For example, the heating power of first layer is less than the second layer in Fig. 3
Heating power, but the heating power of the second layer is also different, and particularly the heating power of four apex angles is greater than non-apex angle
Heating power.By simulating and testing discovery vertically, distance center is remoter, then because the area that is related to of heating is bigger, needs
More heating powers are wanted, especially in outermost layer, because also wanting the liquid outside heating evaporation pipe, it is therefore desirable to evaporation tube
The heating power of unit length is bigger on extending direction.The present invention is added by heating element in setting evaporation tube apart from fluid flowing
The variation of the heating power at thermal part center further improves homogeneous heating degree and heating efficiency.
Preferably, the center of the centre distance fluid flowing heating element 5 of diamond shape through-hole is remoter, then evaporation tube extension side
The amplitude that the heating power of the resistance heater of upward unit length is increasing constantly increases.The change of above-mentioned heating amplitude
Changing is also to obtain by a large amount of numerical simulation and experiment, not the common knowledge of this field.Pass through the variation of above-mentioned amplitude, energy
Enough further increase heating efficiency and homogeneous heating degree.
Preferably, the fluid flowing heating element 5 is octagon core flow flowing heating element, octagon
Through-hole is located at the center of fluid flowing heating element.As shown in Figure 3.
Further preferably, the fluid flowing 5 center of heating element is octagon channel, and the regular quadrangle channel is
Around the double-layer structure of fluid flowing heating element, outermost layer is octagon channel, and the side length of the outer tube is positive the eight of 8 times
The side length of side shape through-hole.
By a large amount of numerical simulation with experiment it is known that the different ability of the heating power requirement of different layers heating element
Reaching uniformly heated purpose, regular quadrangle side length is longer, then since it is desired that the volume of heating is bigger, exterior space is also bigger,
The heating power ratio of the ectonexine then needed is bigger；And the length of evaporation tube extending direction upper fluid flowing heating element is got over
Long, then because the heating surface (area) (HS in whole length is bigger, the distribution of heating is more uniform, therefore the heating function of caused ectonexine
Rate proportion requirement is smaller.Therefore the present invention by a large amount of vertical simulation and tests the heating power for each layer and its side
Length has highly carried out a large amount of research, has obtained optimal heating power relationship.And for the structure of above-mentioned Fig. 3, most
The ratio of the heating power of outer layer heating power and innermost layer is to meet following require:
Preferably, the heating power of each heating element of the first layer is P1, each heating element of the second layer adds
Thermal power is P2, and the fluid flowing heating element length is K1, and the side length in regular quadrangle channel is K2, then meets following
It is required that:
P2/P1=a-b*LN(K1/K2)；Wherein a, b are parameter, 3.25 < a < 3.30,0.92 <b < 0.93；
1.3<P2/P1<1.8；5.0< K1/K2<8.5；
The first layer of single evaporation tube and total heating power of the second layer are M, 1500W < M < 3500W.
Preferably, a=3.28, b=0.923.
Preferably, 1.5 < P2/P1 < 1.7；7.0< K1/K2<7.5；
120<B2<280mm；
8<K2<30mm；
First layer and the second layer are internal layer and outer layer respectively.
Preferably, a is gradually reduced as K1/K2 increases, b is gradually increased.By be arranged such can further such that
Homogeneous heating improves heating efficiency.
Preferably, the direction of the flowing along evaporation tube fluid, the caliber of evaporation tube 6 constantly become larger.It is main former
Because as follows: 1) passing through the caliber for increasing evaporation tube 6, it is possible to reduce the resistance of evaporation tube fluid flowing, so that adding in evaporation tube 6
The fluid of heat is constantly moved towards the increased direction of caliber, to further promote fluid flowing.2) because with fluid
Continuous flowing, liquid continuous heating evaporation in evaporation tube 6, so that fluid volume is increasing, pressure is also more next
It is bigger, therefore meet the variation of ever-increasing steam volume and pressure by increasing caliber, so that pressure on the whole
It is evenly distributed.
Preferably, the direction of the flowing along evaporation tube fluid, the caliber of evaporation tube 6 constantly get over by increased amplitude
Come bigger.The amplitude variation of above-mentioned caliber is that the applicant obtains with numerical simulation through a large number of experiments as a result, by upper
The setting stated further can promote fluid to flow, it is integrally uniform to reach pressure.
Preferably, the multiple fluids of setting flow heating element 5 in evaporation tube 6, the multiple fluid flows heating element 5
Interval setting.Multiple fluids are set by interval and flow heating element 5, so that fluid heats in fluid flowing heating element
Afterwards, it is mixed into nonfluid flowing heating element region, guarantees homogeneous heating.Fluid flowing is respectively enterd after mixing again to add
Thermal part is heated.
Preferably, the multiple fluids of setting flow heating element 5 in evaporation tube 6, from the entrance of evaporation tube 6 to evaporation tube 6
Outlet, fluid flow heating element 5 between spacing it is smaller and smaller.If the distance apart from 6 entrance of evaporation tube is K1, adjacent flow
It is S, S=T that body, which flows the spacing between heating element,1(K1), i.e. S is using distance K1 as the function of variable, and S ' is once leading for S
Number meets following require:
S'<0；
Main cause is further augmentation of heat transfer.By above-mentioned setting, can to get over along fluid flow direction heating power
Come bigger, the countercurrent movement of loop circuit heat pipe is similarly to, so that the heating temperature of pipe outlet is higher and higher.Go out similar to pipeline
The heat source temperature of mouth is higher and higher, so that liquid is sufficiently heated.
It is found through experiments that, by above-mentioned setting, can both keep the whole uniform of heating to the full extent, while can
To improve heating effect.
Further preferably, from the entrance of evaporation tube 6 to the outlet of evaporation tube 6, between adjacent fluid flow heating element
It is continuously increased apart from increasing amplitude.That is S " is the second derivative of S, meets following require:
S”>0;
It is found through experiments that, by so set, heating effect can be further increased.It should be noted that above-mentioned rule is
The rule that applicant obtains with numerical simulation through a large number of experiments is not the common knowledge or conventional means of this field.
Preferably, the multiple fluids of setting flow heating element in evaporation tube 6, from the entrance of evaporation tube 6 to evaporation tube 6
The heating power of outlet, the interior heating element arranged of each regular quadrangle of different fluid flowing heating element gradually increases.If
Distance apart from 6 entrance of evaporation tube is K1, the heating element arranged in each regular quadrangle of adjacent fluid flow heating element
Power is W, S=T3(K1), i.e. W is using distance K1 as the function of variable, and W ' is the first order derivative of W, meets following require:
W’>0;
Main cause is further augmentation of heat transfer.By above-mentioned setting, can to get over along fluid flow direction heating power
Come bigger, the countercurrent movement of loop circuit heat pipe is similarly to, so that the heating temperature of pipe outlet is higher and higher.Go out similar to pipeline
The heat source temperature of mouth is higher and higher, so that liquid is sufficiently heated.
It is found through experiments that, by above-mentioned setting, can both keep the whole uniform of heating to the full extent, while can
To improve heating effect.
Further preferably, from the entrance of evaporation tube 6 to each of the outlet of evaporation tube 6, adjacent fluid flow heating element
The amplitude that the heating element power arranged in regular quadrangle becomes smaller is continuously increased.That is W " is the second derivative of S, and satisfaction is wanted as follows
It asks:
W">0；
Be found through experiments that, by so set, can further keep heating it is whole uniformly, while heating effect can be improved
Fruit.It should be noted that above-mentioned rule is the rule that applicant obtains with numerical simulation through a large number of experiments, it is not ability
The common knowledge or conventional means in domain.
Preferably, the multiple fluids of setting flow heating element in evaporation tube 6, from the entrance of evaporation tube 6 to evaporation tube 6
Outlet, the side length of regular quadrangle are smaller and smaller.Distance apart from 6 entrance of evaporation tube is K1, and the side length of regular quadrangle is C, C=T2
(K1), C ' is the first order derivative of C, meets following require:
C'<0；
Main cause is then to manufacture more difficult because regular quadrangle side length is smaller, but the uniformity integrally heated is better.Because
More arrive evaporation tube outlet, it should which the whole homogeneous heating for keeping liquid avoids partially dryouting caused by heating is uneven.Pass through
Above-mentioned setting can save cost, and reach best homogeneous heating and hot fluid output efficiency.
Further preferably, the entrance of evaporation tube 6 is to the outlet of evaporation tube 6, the smaller and smaller amplitude of the side length of regular quadrangle
It is continuous to increase.C " is the second derivative of C, meets following require:
C”>0。
Preferably, the distance between adjacent fluid flow heating element remains unchanged.
Be found through experiments that, by so set, can further keep heating it is whole uniformly, while can be improved plus
Thermal effect.It should be noted that above-mentioned rule is the rule that applicant obtains with numerical simulation through a large number of experiments, it is not
The common knowledge or conventional means of this field.
Preferably, center of the diamond shape through hole center apart from fluid flowing heating element is remoter, then evaporation tube extending direction
The heating power of the resistance heater of upper unit length is bigger.
Because by experiment and numerical simulation it is known that outward, then the volume for needing to heat is bigger, especially most
Outside needs to heat the liquid in inner tube.The present invention flows heating element apart from fluid by heating element in setting evaporation tube
The variation of the heating power at center further improves homogeneous heating degree and heating efficiency.
Preferably, center of the diamond shape through-hole apart from fluid flowing heating element is remoter, then it is single on evaporation tube extending direction
The amplitude that the heating power of the resistance heater of bit length is increasing constantly increases.By so rule setting, further
Improve homogeneous heating degree and heating efficiency.
Preferably, the heating power of the unit length of heating element 16 is continuous along fluid flow direction in evaporation tube
Increase.Main cause is further augmentation of heat transfer.By above-mentioned setting, can make along fluid flow direction heating power
It is increasing, it is similarly to the countercurrent movement of loop circuit heat pipe, so that the heating temperature of pipe outlet is higher and higher.Similar to pipeline
The heat source temperature of outlet is higher and higher, so that liquid is sufficiently heated.By largely testing and numerical simulation, process are above-mentioned
Evaporation tube heating power variation, can further increase 10% or so heating efficiency, save heating time.
Preferably, along short transverse, the amplitude of the continuous reduction of the heating power of the unit length of electrically heated rod 16
It is continuous to increase.
By largely testing and numerical simulation can by the variation of above-mentioned 16 heating power amplitude of electrically heated rod
5% heating efficiency is further increased, further saves heating time.
Preferably, the same electrically heated rod 16 in same fluid flowing heating element divides for multistage, along evaporation
The heating power of tube fluid flow direction, the unit length of different sections is different.Wherein along fluid flow direction in evaporation tube,
The heating power of the unit length of different sections constantly increases.Further preferably, increased amplitude constantly increases.
Preferably, every section of length is identical.
Preferably, the heating power of every section of unit length is identical.
Specific reason is as above.
It is segmented by setting, it can be further such that being simple to manufacture conveniently.
It is learnt by analyzing and testing, the spacing that evaporation tube extending direction fluid flows between heating element cannot mistake
Greatly, the effect for causing hot fluid to generate if excessive is bad, while can not be too small, causes to be easy burning in inner tube if too small
Dry, similarly, the side length of regular quadrangle can not be too large or too small, excessive to cause heating uneven, too small to lead to regular quadrangle
It is overstocked with octagon distribution, cause flow resistance increase and processing cost to increase.Therefore the present invention is through a large number of experiments,
In the case where preferentially meeting hot fluid quantity of steam, so that being optimal of resistance, has arranged the optimal relationship of parameters.
Preferably, the distance between adjacent fluid flow heating element is S1, the side length of regular quadrangle is K2, fluid stream
Dynamic heating element is positive quadrangular section, and the side length that fluid flows heating element regular quadrangle section is B2, meets following require:
S1/B2=a-b* (10*K2/B2)；
Wherein a, b are parameters, wherein 0.735 < a < 0.740,2.67 <b < 2.68；
180<B2<360mm；
12<K2<45mm；
45<S1<170mm。
Further preferably, a=0.734, b=2.675;
Further preferably, with the increase of K2/B2, a is increasing, and b is smaller and smaller.
Preferably, the side length K2 of diamond shape through-hole is the average value of side length and outer side length in diamond shape through-hole, fluid flowing adds
The side length B2 in thermal part regular quadrangle section is that side length and outer side length are averaged in fluid flowing heating element regular quadrangle section
Value.
The distance between adjacent fluid flow heating element is that S1 is the face opposite with adjacent fluid flow heating element
Distance.Such as right part fluid flowing heating element left side and left part fluid flowing heating element right side between away from
From.
Preferably, with the increase of B2, K2 is also continuously increased.But with the increase of B2, the ever-increasing amplitude of K2
It is smaller and smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, and the variation of above-mentioned rule, Neng Goujin are passed through
One step improves heat transfer effect, reduces noise.
Preferably, with the increase of B2, S1 constantly reduces.But with the increase of B2, the ever-reduced amplitude of S1 is got over
Come smaller.This rule variation is obtained by a large amount of numerical simulation and experiment, can be into one by the variation of above-mentioned rule
Step improves heat transfer effect, reduces noise.
Preferably, the side length in fluid flowing heating element regular quadrangle section is equal to the side length of the inner wall of evaporation tube.
It is preferably 50-300mm that fluid, which flows heating element length K1, is further selected as 100-150mm.
Preferably, evaporation length of tube is between 3000-3500mm.Further preferably, between 3200-3300mm.
By the preferred of the optimal geometric scale of above-mentioned formula, can be realized under the conditions of meeting normal flow resistance,
Damping noise reduction reaches optimum efficiency.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
For parameters such as other parameters, such as tube wall, shell wall thickness according to normal standard setting.
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 (10)
1. a kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, described
Liquid absorbs heat in evaporation part and evaporates, and enters condensation part heat release by riser portions, then returns to evaporation part, the steaming by falling portion
Hair portion includes electric heating element, which is characterized in that the power of electric heating element takes following method to design: in evaporation part
The heart is remoter, then the heating power of the electric heating element of unit length is bigger on evaporation tube extending direction.
2. the method as described in claim 1, which is characterized in that the center apart from evaporation part is remoter, then evaporation tube extending direction
The amplitude that the heating power of the electric heating element of upper unit length is bigger constantly increases.
3. a kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, described
Liquid absorbs heat in evaporation part and evaporates, and enters condensation part heat release by riser portions, then returns to evaporation part, the steaming by falling portion
Hair portion includes electric heating element, which is characterized in that loop circuit heat pipe takes following method to design: the evaporation tube is taken along evaporation
The caliber in the direction of the flowing of tube fluid, evaporation tube constantly becomes larger.
4. the method as described in claim 1, which is characterized in that along evaporation tube fluid flowing direction, evaporation tube 6
Constantly increased amplitude is increasing for caliber.
5. a kind of optimum design method of electric heating loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, described
Liquid absorbs heat in evaporation part and evaporates, and enters condensation part heat release by riser portions, then returns to evaporation part, the steaming by falling portion
Hair portion includes electric heating element, which is characterized in that distance evaporation tube inlet distance be K1, adjacent fluid flow heating element it
Between spacing be S, S=T1(K1), i.e. S is using distance K1 as the function of variable, and S ' is the first order derivative of S, meets following require:
S’<0。
6. the optimum design method of electric heating loop circuit heat pipe as described in claim 1, which is characterized in that i.e. S " is the secondary of S
Derivative meets following require:
S”>0。
7. a kind of optimum design method of loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid exist
Evaporation part heat absorption evaporation, enters condensation part heat release by riser portions, then returns to evaporation part, the evaporation part packet by falling portion
Including electric heating element, which is characterized in that the same electrically heated rod in the same fluid flowing heating element is divided into multistage, along
The heating power of fluid flow direction in evaporation tube, the unit length of different sections is different；Wherein along evaporation tube fluid flowing
The heating power in direction, the unit length of different sections constantly increases.
8. the optimum design method of loop circuit heat pipe as claimed in claim 7, increased amplitude constantly increases.
9. a kind of optimum design method of loop circuit heat pipe, including evaporation part, condensation part, riser portions and falling portion, the liquid exist
Evaporation part heat absorption evaporation, enters condensation part heat release by riser portions, then returns to evaporation part, the evaporation part packet by falling portion
Include electric heating element, which is characterized in that the side length of regular quadrangle is K2, and fluid flows the side length in heating element regular quadrangle section
For B2, meet following require: with the increase of B2, K2 is also continuously increased.
10. the optimum design method of loop circuit heat pipe as claimed in claim 9, with the increase of B2, the ever-increasing amplitude of K2
It is smaller and smaller.
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