CN102332041A - Heat radiating performance analysis and structure design system for tube and fin type radiator - Google Patents

Heat radiating performance analysis and structure design system for tube and fin type radiator Download PDF

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Publication number
CN102332041A
CN102332041A CN201110251690A CN201110251690A CN102332041A CN 102332041 A CN102332041 A CN 102332041A CN 201110251690 A CN201110251690 A CN 201110251690A CN 201110251690 A CN201110251690 A CN 201110251690A CN 102332041 A CN102332041 A CN 102332041A
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module
radiator
heat
design
structure design
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杨学锋
冯振山
沈键
吕杰
武斌
刘磁宁
王庆华
韩庆民
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Shandong Tongchuang Auto Cooling System Co Ltd
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Shandong Tongchuang Auto Cooling System Co Ltd
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Abstract

The invention discloses a heat radiating performance analysis and structure design system for a tube and fin type radiator. The system is characterized by comprising an area calculating module, a radiator design module, a result examination module, a data storage module and a video display module, wherein the area calculating module can be used for selectively calculating the type of the area of the radiator; the radiator design module is used for designing the radiator, performing structure design of the radiator according to input rated heat dissipating capacity and storing a design result meeting the design requirement into the data storage module to look up; the result examination module is used for querying data entered into the data storage module according to input conditions; the data storage module is used for recording information to be stored by the system, which comprises radiator design information, structure parameter information, working condition parameter information and personnel information; and the video display module is used for displaying a three-dimensional model of the radiator.

Description

A kind of pipe rock radiator heat dispersion is analyzed and structure design system
Technical field
The present invention designs pipe rock radiator analysis and structural design field, specifically, relates to analysis of a kind of pipe rock radiator heat dispersion and structure design system.
Background technology
Automobile radiators is the vitals in the engine-cooling system, and its function is that the part heat in the engine cylinder-body is passed to atmosphere through liquid coolant in the cooling system and fan.To the automobile different model, the specification that heating radiator produces also has nothing in common with each other.The cooling effect of heating radiator depends primarily on the design and the rational Match of its service condition and each parts of system, and the rationality of each parts match has very big influence to the usability of heating radiator.
In the automobile radiators product design, design parameter is many, and workload is big, and the subject that relates to is very numerous and diverse, comprising many-sided factors such as thermodynamics, fluid mechanics and mechanics.Because requiring that modern product updates is increasingly high; Adapt with it; Require designer's level professional technology higher, in a series of products of automobile radiators, have the shape and structure of many parts to have common trait simultaneously, just have certain difference dimensionally.Therefore, develop a kind of automobile radiators quick design system and will improve design efficiency greatly, shorten the design cycle, also can improve the design accuracy and the quality of product simultaneously.
Summary of the invention
The technical matters that the present invention will solve provides analysis of a kind of pipe rock radiator heat dispersion and structure design system, has improved Design of for heat sinks efficient, has shortened the design cycle.
The present invention adopts following technological means to realize goal of the invention:
A kind of pipe rock radiator heat dispersion is analyzed and structure design system, it is characterized in that: comprising:
Area computing module: the type that can select to calculate radiator area;
Fansink designs module: carry out fansink designs, carry out the heat spreader structures design, deposit the design result that adheres to specification in data memory module, in order to consulting according to the specified heat dissipation capacity of input;
The result checks module: the data based initial conditions to the logging data memory module is inquired about;
Data memory module: the minute book system needs canned data, comprises fansink designs information, structural parameters information, duty parameter information and personal information;
The video display module: the three-dimensional model to heating radiator is showed.
Further qualification as to the present technique scheme also comprises:
Heating radiator is checked module: the check of carrying out heating radiator is calculated, and according to the heat dissipation capacity of the Design of for heat sinks Structure Calculation heating radiator of importing, meets actual requirement if calculate the heat dissipation capacity of heating radiator, then can be with data logging data memory module;
As the further qualification to the present technique scheme, said area computing module comprises the gentle lateral area computing unit of water lateral area computing unit.
As the further qualification to the present technique scheme, said fansink designs module comprises single design cell and double design cell.
As the further qualification to the present technique scheme, said heating radiator is checked module and is comprised single check unit and double check unit.
As the further qualification to the present technique scheme, said data memory module comprises structural parameters record cell, design information record cell, duty parameter record cell and personal information record cell.
Further qualification as to the present technique scheme also comprises user management module.
Compared with prior art, advantage of the present invention and good effect are: area computing module of the present invention can select to calculate the type of radiator area; The fansink designs module is carried out fansink designs, carries out the heat spreader structures design according to the specified heat dissipation capacity of input, deposits the design result that adheres to specification in data memory module, in order to consulting; Heating radiator is checked the heat dissipation capacity of module according to the Design of for heat sinks Structure Calculation heating radiator of input, meets actual requirement if calculate the heat dissipation capacity of heating radiator, then can be with data logging data memory module; The result checks that module inquires about according to initial conditions the data of logging data memory module; Data memory module minute book system needs canned data, comprises fansink designs information, structural parameters information, duty parameter information and personal information; The video display module is showed the three-dimensional model of heating radiator.The present invention has shortened the automobile radiators design cycle greatly, has improved design efficiency, has alleviated designer's labor capacity greatly, has also improved the precision and the quality of product design simultaneously.
 
Description of drawings
Fig. 1 is the block diagram of the preferred embodiment of the present invention.
Fig. 2 is a radiating tube cross section structure synoptic diagram of the present invention.
Fig. 3 is a fin efficiency schematic diagram of the present invention.
Fig. 4 for the present invention once with secondary heat-transfer area structural representation.
Fig. 5 is a fansink designs process flow diagram of the present invention.
Fig. 6 designs the intermediate parameters process flow diagram for the present invention.
Fig. 7 checks the module process flow diagram for heating radiator of the present invention.
Fig. 8 is a design parameter input window of the present invention.
Fig. 9 is a design result display window of the present invention.
Figure 10 checks window for the present invention designs intermediate parameters.
Figure 11 is a design data logging data library window of the present invention.
Figure 12 is a check result display window of the present invention.
Figure 13 designs and the check result query window for the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the present invention is made detailed description further.
Referring to Fig. 1-Figure 13, the embodiment of the invention is at first introduced the method that radiator heat-dissipation performance evaluation and structural design use, and is specific as follows:
One, pipe rock radiator analysis of Heat Transfer
1.1 physical dimension is calculated
1.1.1 the water lateral area calculates
Fw=perimeter of section * core height * cooling water pipe number
Figure 2011102516904100002DEST_PATH_IMAGE002
(1-1)
Wherein:
Figure 2011102516904100002DEST_PATH_IMAGE004
---water side heat transfer area [m2];
Figure 2011102516904100002DEST_PATH_IMAGE006
---the transversal face length of water pipe [mm]
Figure 2011102516904100002DEST_PATH_IMAGE008
---the transversal face width of water pipe [mm]
Figure 2011102516904100002DEST_PATH_IMAGE010
---water pipe long [mm]
Figure 2011102516904100002DEST_PATH_IMAGE012
---water pipe number
1.1.2 the gas lateral area calculates
The number of plies of distance * heat radiator in the effective width/fin of FA=fin unit girth * fin unit
Figure 2011102516904100002DEST_PATH_IMAGE014
（1－2）
Wherein: ---gas side heat transfer area [m 2]
---fin wave height [mm]
Figure 2011102516904100002DEST_PATH_IMAGE020
---the fin pitch of waves [mm]
---core body thickness [mm]
---gas wing passage number
1.2 the calculating of equivalent diameter
On the free area of total stream, the contact length of fluid and solid wall surface is called wetted perimeter, representes with letter U.The net sectional area A of total stream and the ratio of wetted perimeter U are defined as hydraulic radius; Represent with letter r, i.e.
Figure 2011102516904100002DEST_PATH_IMAGE026
.Heat transfer process in pipe is got ips D, gets tube outer diameter d when outside pipe, forcing fluid interchange, and non-circular pipeline is then got its equivalent diameter De.
For the pipeline of round section, when representing with hydraulic radius, its equivalent diameter can be expressed as d=4R, and promptly the pipeline geometric diameter of round section is 4 times a hydraulic radius.
For with circular pipe analogy mutually, the equivalent diameter D of noncircular cross section pipeline also can show with 4 times hydraulic radius, promptly
Figure 2011102516904100002DEST_PATH_IMAGE028
(1-3)
In the formula: A: the actual internal area of fluid;
U: wetted perimeter limit or hot Zhou Bianchang.When calculating resistance, it is the fluid wets periphery; When Calculation of Heat Transfer, be the periphery of participating in heat transfer.
1.2.1 water wing passage (rectangle) equivalent diameter
Figure 2011102516904100002DEST_PATH_IMAGE030
（1－4）
1.2.2 gas wing passage equivalent diameter
The passage equivalent diameter of a fin and a heat-transfer area composition
Figure 2011102516904100002DEST_PATH_IMAGE032
（1－5）
1.3 the calculating of mean temperature difference (MTD)
In the ordinary course of things, the heat transfer temperature difference between two kinds of fluids is not wait in heat exchanger everywhere, and so-called mean temperature difference (MTD) is meant the whole heat exchanger mean value of the temperature difference everywhere.The different averaging method of its computing application just has different titles.
Fluid flows in heat exchanger, and its temperature changing process is the simplest with PARALLEL FLOW.Following current and adverse current just belong to the simplest type of flow, but on the practical applications often owing to need to transmit a large amount of heat and receive the restriction in space, so will adopt multipaths, cross-flow and the heat exchanger that flows of complex way more.
The calculating of the mean temperature difference (MTD) of mixed flow and cross-flow passes is more complicated than following current and adverse current, but after the assumed condition of more additional simplification, all available mathematical method derives.But these mathematical formulaes are very loaded down with trivial details; Thereby often the fluid inlet and outlet temperature of these types of flow is calculated log-mean temperature difference by adverse current earlier; Multiply by then owing to its type of flow is different from the correction factor ψ that adverse current is introduced; Read up the literature and find that flat value is between the 0.95-0.98, generally gets 0.98 in calculating.Case hot fluid import and export temperature is respectively th1, th2, and the import and export temperature of cold fluid is respectively tc1, tc2, then:
Figure 2011102516904100002DEST_PATH_IMAGE034
（1－6）
△ tmax represents △ t ' (△ t '=
Figure 2011102516904100002DEST_PATH_IMAGE036
) and △ t " (△ t "=
Figure 2011102516904100002DEST_PATH_IMAGE038
in the formula) the maximum among both, and
△ tmin represents △ t ' and △ t " reckling among both.
 
1.4 the calculating of fin efficiency and fin surface total efficiency
Fin is the primary element of tube-strip style heat exchanger.Heat interchange between the cold fluid and hot fluid is most of through fin, and fraction directly carries out through radiating tube.In the normal design, the long-pending 67%--88% that is approximately the heat exchanger total heat conduction area of fin heat transfer surfaces.Being connected between fin and the radiating tube is perfect soldering, and therefore most of heat is passed to fin and passed to cold fluid by fin through radiating tube.After fin is welded on the light pipe surface; Under the situation of in by pipe, outside pipe, conducting heat; Heat will outwards transmit along fin height from the fin root, the fluid around constantly passing to simultaneously with the mode of convection heat transfer, and its result just makes the fin temperature descend gradually along short transverse.As shown in Figure 3.The fin temperature descends along short transverse gradually, explains that the difference of fin temperature and surrounding fluid temperature is being dwindled gradually, and the heat of unit area is being dwindled gradually.Like this, fin surface is long-pending is descending to the validity that strengthens heat exchange.Fin is high more, and the area heat exchanging role of its increase is just more little.Therefore, need to introduce the notion of fin efficiency.The numerical value of fin efficiency depends on the shape of fin, thickness, and highly, material more importantly also depends on the heat transfer outside a tube coefficient.
The not such direct heat transfer of astigmatism heat pipe because fin conducts heat, but pass to tube wall by the radiating tube tube wall, pass to cold fluid by fin again, so fin has the title of " two subsurfaces " again.The secondary heat-transfer area generally heat transfer efficiency than a heat-transfer area is low; But experiment proof; The heat-sinking capability of secondary heating surface has very significant effects to the heat-sinking capability of heating radiator; Particularly on the secondary heating surface, go out a series of blinds fenestras, in order to upset the laminar flow of fin surface, this measure can make heat transfer property improve.
From heat-transfer mechanism; The principal feature of pipe rock radiator is to have the secondary heat-transfer area; So diabatic process is not only at heat-transfer area but also on the secondary heat-transfer area, carry out simultaneously, its total heat transfer capacity equals heat-transfer area heat transfer capacity and secondary heat-transfer area heat transfer capacity sum.One time heat-transfer area refers to the water pipe wall, and the secondary heat-transfer area refers to the surface of fin.As shown in Figure 4:
(1-7)
Figure 2011102516904100002DEST_PATH_IMAGE042
(1-8)
Figure 2011102516904100002DEST_PATH_IMAGE044
: a heat that heat-transfer area transmits;
Figure 2011102516904100002DEST_PATH_IMAGE046
: secondary heat that heat-transfer area transmits;
Figure 2011102516904100002DEST_PATH_IMAGE048
: a heat transfer surface area;
Figure 2011102516904100002DEST_PATH_IMAGE050
: secondary heat transfer surface area;
Surface coefficient of heat transfer between heat-transfer area of h1 and air;
H2: surface coefficient of heat transfer between secondary heat-transfer area and air;
Tw: water wall surface temperature; Ta: the temperature of air; Tm: fin surface medial temperature.
Because fin height is more much bigger than fin thickness direction; So thinking, we can ignore in fin wall thickness direction thermograde; Then have thermograde along the fin height direction, the temperature of fin root is higher than water wall surface temperature tw most, and the medial temperature of fin will be lower than tw.For more convenient calculating total heat transfer, the secondary heat transfer capacity is done following the conversion:
Figure 2011102516904100002DEST_PATH_IMAGE052
(1-9)
Then equate to try to achieve fin efficiency η f with (formula 1-9) by formula (1-8):
Figure 2011102516904100002DEST_PATH_IMAGE054
（1－10）
Comparison expression (1-8) is visible with formula (1-9); If regard the heat transfer temperature of secondary heat-transfer area as equal with the heat transfer temperature of a heat-transfer area; All be
Figure 2011102516904100002DEST_PATH_IMAGE056
; In requisition for the secondary heat transfer area being multiply by a coefficient, promptly be multiplied by the fin efficiency
Figure 2011102516904100002DEST_PATH_IMAGE058
of secondary heat-transfer area.Fin efficiency
Figure 966213DEST_PATH_IMAGE058
numerically equals the ratio of heat transfer temperature difference of the actual average temperature difference and a heat-transfer area of secondary heat-transfer area.
Fin efficiency
Figure 883354DEST_PATH_IMAGE058
is found the solution:
Figure 2011102516904100002DEST_PATH_IMAGE060
(1-11)
Wherein: m is
Figure 2011102516904100002DEST_PATH_IMAGE062
; is surface film thermal conductance;
Figure 2011102516904100002DEST_PATH_IMAGE066
is the coefficient of heat conductivity of material, and
Figure 2011102516904100002DEST_PATH_IMAGE068
is the thickness of fin.
Be the heat transfer distances on the fin.
 
Total heat transfer is:
Figure 2011102516904100002DEST_PATH_IMAGE070
(1-12)
In the formula: F=F1+F2, h=h1=h2, then:
Figure 2011102516904100002DEST_PATH_IMAGE072
(1-13)
It is thus clear that; The physical significance of fin surface total efficiency is; Treat the secondary heat-transfer area is the same with heat-transfer area; Think and the following time of heat transfer temperature difference
Figure 2011102516904100002DEST_PATH_IMAGE074
that all is in a heat-transfer area total heat-transfer area F multiply by a coefficient.
1.5 the calculating of heat transfer capacity
The heat transfer equation formula of cold and hot fluid is following in the pipe rock radiator:
(1-14)
Figure DEST_PATH_IMAGE078
(1-15)
In the formula:
Figure DEST_PATH_IMAGE080
: wall is to the thermal discharge of cold fluid;
Figure DEST_PATH_IMAGE082
: hot fluid is to the thermal discharge of wall;
: surface coefficient of heat transfer between cold fluid and wall;
Figure DEST_PATH_IMAGE084
: surface coefficient of heat transfer between hot fluid and wall;
: cold fluid pass fin surface total efficiency;
Figure DEST_PATH_IMAGE088
: the temperature of cold fluid;
Figure DEST_PATH_IMAGE090
: the temperature of hot fluid;
Under the steady heat transfer situation;
Figure DEST_PATH_IMAGE092
=
Figure DEST_PATH_IMAGE094
=
Figure DEST_PATH_IMAGE096
; And ignore fin and dividing plate thermal resistance, formula (1-14) and formula (1-15) conversion, addition can be got:
Figure DEST_PATH_IMAGE098
(1-16)
Because in heat exchanger; The temperature of fluid normally longshore current journey changes; So two fluid temperature differences in formula (1-16) formula are taken as log-mean temperature difference
Figure DEST_PATH_IMAGE100
, then:
Figure DEST_PATH_IMAGE102
（1－17）
Formula (1-17) can be written as:
Figure DEST_PATH_IMAGE104
(1-18)
Figure DEST_PATH_IMAGE106
（1－19）
In the formula:
Figure DEST_PATH_IMAGE108
: the heat transfer coefficient when cold passage total heat conduction area is benchmark;
: the heat transfer coefficient when passage of heat total heat conduction area is benchmark.
 
Figure DEST_PATH_IMAGE110
(1-20)
Figure DEST_PATH_IMAGE112
(1-21)
The basis that exchanger heat calculates is heat balance equation and heat transfer equation formula.
The heat transfer equation formula is:
Figure DEST_PATH_IMAGE114
(1-22)
Heat balance equation is:
Figure DEST_PATH_IMAGE116
(1-23)
In the formula (1-23):
Figure DEST_PATH_IMAGE118
,
Figure DEST_PATH_IMAGE120
: be respectively the flow of cold fluid and the flow of hot fluid, unit all is [kg/s];
Figure DEST_PATH_IMAGE122
,
Figure DEST_PATH_IMAGE124
: be respectively the specific heat at constant pressure of cold fluid and the specific heat at constant pressure of hot fluid, unit all is [kJ/ (kg a ℃)];
Figure DEST_PATH_IMAGE126
: the thermal capacitance flow of cold fluid;
Figure DEST_PATH_IMAGE128
: the thermal capacitance flow of hot fluid, unit all are [kJ/ (s ℃)];
Q: heat dissipation capacity, unit is [w].
1.6 heat transfer coefficient calculates
Can know heat transfer coefficient by formula (1-20) KCalculating, all other constants all draw than being easier to, and come down to surface coefficient of heat transfer , Calculating.Heat transfer coefficient KCalculating be a suitable complicated problems, when needs were known more accurately numerical value, heat transfer coefficient can only calculate.But heat transfer coefficient that calculates and reality also have gap, mainly be owing to the formula that calculates coefficient of heat transfer not exclusively accurately and dirtiness resistance also be not easy reasons such as accurately estimation, each influence factor changes all a little can influence its value.
 
1.6.1 hot fluid (water side) surface coefficient of heat transfer h hCalculating:
(1-24)
In the formula : the coefficient of heat conductivity of water;
Dw: the equivalent diameter of water side rectangular channel;
Nu: Nusselt number;
Nusselt number can be obtained by document, is a strong and weak dimensionless number of reflection convection heat transfer' heat-transfer by convection.Be the dimensionless number of the product of heat transfer coefficient h and characteristic length L divided by fluid thermal conductance λ gained.Be defined as: Nu=hL/ λ.
For Rew≤2300, fluid belongs to Laminar Flow, and Nu is decided wall temperature rectangular channel theoretical solution and tried to achieve by full-blown:
Figure DEST_PATH_IMAGE138
(1-25)
It in the formula water pipe xsect length-width-ratio.
In an interim state when flowing, promptly when 2300 < Rew≤10,000 scope is interior, use Ge Nilinsiji (Gnielinski) formula:
Figure DEST_PATH_IMAGE140
(1-26)
Be in disturbed flow condition, i.e. Rew > when flowing; 10,000 (inertial force is to the dimensionless number of viscous force ratio in fluid motion Re=vU/ υWherein vBe the velocity characteristic yardstick, UBe the length characteristic yardstick, υBe the kinematics viscosity coefficient.) time, the petukhov formula is used to calculate water side surface heat transfer coefficient:
Figure DEST_PATH_IMAGE142
(1-27)
Calculate by the Filonenko formula for formula (1-26), formula (1-27) pipe coefficient of interal friction:
Figure DEST_PATH_IMAGE144
(1-28)
Because heating radiator fluid in the water pipe when work generally is in transition or disturbed flow condition, and the heat transfer rate of laminar condition is too low, so in calculating, laminar condition is not discussed.
1.6.2 the surface coefficient of heat transfer of cold fluid (gas side) h aCalculating:
Figure DEST_PATH_IMAGE146
(1-29)
In the formula: ha: the surface coefficient of heat transfer of cold fluid (being air side), [w/ (m2 ℃)];
Cp: the specific heat at constant pressure of air side, [J/ (kg ℃)];
Ga: MAF (its value is the product of flow velocity and atmospheric density), [kg/ (m2s)];
J: the surface heat transfer factor, promptly nondimensional surface coefficient of heat transfer.Expression formula by the defined heat transfer factor j of Ke Erpeng (Colburn) law of analogy is:
Figure DEST_PATH_IMAGE148
(1-30)
In the formula: is thermal diffusivity;
St: Si Tandeng number,
Figure DEST_PATH_IMAGE152
.
Friction factor f is defined as: on flow direction, and the ratio of the shearing force on the fluid unit of the flowing through heat transfer area and the mobile kinetic energy of unit volume, that is:
Figure DEST_PATH_IMAGE154
(1-31)
By the experiment measuring side pressure difference △ P that gives vent to anger, then gas side surface friction factor f is:
Figure DEST_PATH_IMAGE156
(1-32)
In the formula:
Ac: cross-sectional flow area;
△ P: the wind wall pressure is poor before and after the heating radiator;
Rea: air Reynolds number,
Figure DEST_PATH_IMAGE158
Figure DEST_PATH_IMAGE160
; δ is flow area Ac and the ratio of front face area Afr,
Figure DEST_PATH_IMAGE162
.
Gas side nusselt number is:
Can be found out with dimensionless j and f by above expression formula and to represent heat transfer characteristic and rubbing characteristics, j is big more, and f is more little, and promptly heat-transfer surface obtains bigger heat-transfer effect under the condition that consumes smaller power, and heat transfer property is good more.
When carrying out pipe rock radiator calculating; Not only should be according to fin form, fin parameter, and count Re and heat transfer factor j according to the Reynolds.criterion that manufacturer's trial provided, Reynolds.criterion is counted the graph of a relation of Re and friction factor f; Check in the value of j and f, conduct heat and fluid resistance calculating.
Fan power P:
Figure DEST_PATH_IMAGE166
(1-33)
Afr: front face area.
1.7 the physical parameter of fluid
1.7.1 qualitative temperature
Reasonably qualitative temperature can accurately show the characteristic of fluid, on the basis of comprehensive existing qualitative temperature method for expressing, gets under the condition of different qualitative temperatures; The calculating of being correlated with; And result of calculation analyzed, comparative result shows that the rerum natura of fluid is obvious with temperature variation.Physical parameter in the similarity criterion number all changes with the variation of fluid temperature (F.T.), thereby all criterion equation have all indicated the physical parameter that is as the criterion with which temperature, is qualitative temperature in order to the temperature of confirming physical parameter.Following the example of of qualitative temperature roughly has three kinds: the medial temperature of a, fluid is a qualitative temperature; B, to get wall surface temperature be qualitative temperature; C, the medial temperature of getting fluid and wall are qualitative temperature.
For oils and other full-bodied fluid because heating or cooling procedure medium viscosity can change a lot, at this moment if with the arithmetic mean temperature of fluid import and export as qualitative temperature, tend to make the very big error of coefficient of heat transfer appearance.Because the viscosity of water is little, therefore confirm that with a kind method the qualitative temperature of water gets final product.
(1) qualitative temperature of water:
Figure DEST_PATH_IMAGE168
(1-34)
(2) qualitative temperature of air:
Figure DEST_PATH_IMAGE170
(1-35)
1.7.2 physical parameter polynomial expression
(1) physical parameter of water:
Figure DEST_PATH_IMAGE174
Figure DEST_PATH_IMAGE176
Figure DEST_PATH_IMAGE178
(2) air physical parameter:
Figure DEST_PATH_IMAGE180
Figure DEST_PATH_IMAGE182
In above-mentioned each polynomial expression: subscript w, a represent water and air respectively.
λ: coefficient of heat conductivity, [W/ (m ℃)];
υ: kinematic viscosity, [m2/s];
Pr: Prandtl number;
ρ: density, [kg/m3].
1.8 checking, calculates heat
Figure DEST_PATH_IMAGE186
(1-36)
Where
Figure DEST_PATH_IMAGE188
,
Figure DEST_PATH_IMAGE190
are the water side and gas side of the heat dissipation.
Figure DEST_PATH_IMAGE192
(1-37)
(1-38)
In formula (1-37), the formula (1-38); Air
Figure DEST_PATH_IMAGE194
=1.005kw/ (kg ℃) is not with temperature variation, and
Figure DEST_PATH_IMAGE196
,
Figure DEST_PATH_IMAGE198
,
Figure DEST_PATH_IMAGE200
, w are determined by the qualitative temperature of empty G&W.
A kind of pipe rock radiator heat dispersion is analyzed and structure design system, it is characterized in that: comprising:
Area computing module: the type that can select to calculate radiator area;
Fansink designs module: carry out fansink designs, carry out the heat spreader structures design, deposit the design result that adheres to specification in data memory module, in order to consulting according to the specified heat dissipation capacity of input;
The result checks module: the data based initial conditions to the logging data memory module is inquired about;
Data memory module: the minute book system needs canned data, comprises fansink designs information, structural parameters information, duty parameter information and personal information;
The video display module: the three-dimensional model to heating radiator is showed, utilizes SolidWorks software that heating radiator is carried out three-dimensional display;
Also comprise:
Heating radiator is checked module: the check of carrying out heating radiator is calculated, and according to the heat dissipation capacity of the Design of for heat sinks Structure Calculation heating radiator of importing, meets actual requirement if calculate the heat dissipation capacity of heating radiator, then can be with data logging data memory module;
Said area computing module comprises the gentle lateral area computing unit of water lateral area computing unit; As required; The transversal face length of input calculating parameter water pipe, the transversal face width of water pipe, long, the water pipe number of water pipe; Carry out water side heat transfer area and calculate,, carry out gas side heat transfer area and calculate according to input calculating parameter fin wave height, the fin pitch of waves, the gentle wing passage number of core body thickness.
Said fansink designs module comprises single design cell and double design cell.Single design cell is the fansink designs of row's radiating tube, and double design cell is the fansink designs of two row's radiating tubes.
Said heating radiator is checked module and is comprised single check unit and double check unit.Single check unit is that the heating radiator of row's radiating tube is checked, and double check unit is that the heating radiator of double-row heat dissipation pipe is checked.
Said data memory module comprises structural parameters record cell, design information record cell, duty parameter record cell and personal information record cell.
The fansink designs module: before calculating, at first will import known conditions, known conditions has structural parameters, duty parameter and the specified heat dissipation capacity of heating radiator.
The structural parameters of heating radiator comprise: core body height H 1 (being the long H1 of water pipe), core body thickness LL, core body length L, pipe number N1, the long L1 of tube section, the wide w1 of tube section, fin wave height HH, fin pitch of waves w, fin thickness δ f.H1 wherein, LL, L are the shaping sizes of heating radiator.L1, w1, HH, w, δ f are existing specifications in the actual production, so can directly choose.Duty parameter has: inflow temperature tw1, EAT ta1, the specific heat at constant pressure Cpw of water; Pressurization by compressed air specific heat Cpa, air pressure difference qyPa, speed ufr facings the wind; Discharge Gw, air quantity (air mass flow) Ga, material (aluminium) coefficient of heat conductivity λ and specified heat dissipation capacity Qed:, safety coefficient η aq
Computation process and result treatment:
(1) according to the specified heat dissipation capacity of heating radiator needs of input, the counter gentle lateral area of water lateral area of asking heating radiator draws the physical dimension of radiating tube and heat-radiation belt.
(2) as requested duty parameter is obtained the qualitative temperature transitivity parameter of water and wind, calculates each intermediate parameters and criterion numeral.
(3) according to the gentle side coefficient of heat transfer of design size, operating mode and water side, draw the heat dissipation capacity of design heating radiator, compare with the specified heat dissipation capacity that requires, if error is in allowed limits then meet the requirements, on the contrary undesirable.
The computation process that heating radiator is checked module is:
(1) according to the structural parameters of input, calculate the gentle lateral area of water lateral area of heating radiator, and the water side, the equivalent diameter of gas side.
(2) calculate leaving water temperature, leaving air temp according to specified heat dissipation capacity, inflow temperature, EAT, specific heat and heat calculation formulas, and then calculate the qualitative temperature transitivity parameter of water and wind.
(3) calculate the gentle side coefficient of heat transfer of water side coefficient of heat transfer, calculate heat dissipation capacity then, through with the comparison of specified heat dissipation capacity, if error is in allowed limits then adhere to specification.
(4) can check the final calculation result and the results of intermediate calculations of design, with the data logging data memory module that adheres to specification.

Claims (7)

1. a pipe rock radiator heat dispersion is analyzed and structure design system, it is characterized in that: comprising:
Area computing module: the type that can select to calculate radiator area;
Fansink designs module: carry out fansink designs, carry out the heat spreader structures design, deposit the design result that adheres to specification in data memory module, in order to consulting according to the specified heat dissipation capacity of input;
The result checks module: the data to the logging data memory module are inquired about according to initial conditions;
Data memory module: the minute book system needs canned data, comprises fansink designs information, structural parameters information, duty parameter information and personal information;
The video display module: the three-dimensional model to heating radiator is showed.
2. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: also comprise:
Heating radiator is checked module: the check of carrying out heating radiator is calculated, and according to the heat dissipation capacity of Design of for heat sinks Structure Calculation heating radiator, meets actual requirement if calculate the heat dissipation capacity of heating radiator, then can be with data logging data memory module.
3. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: said area computing module comprises the gentle lateral area computing unit of water lateral area computing unit.
4. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: said fansink designs module comprises single design cell and double design cell.
5. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: said heating radiator is checked module and is comprised single check unit and double check unit.
6. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: said data memory module comprises structural parameters record cell, design information record cell, duty parameter record cell and personal information record cell.
7. analyze and structure design system according to the said pipe rock radiator heat dispersion of claim 1, it is characterized in that: also comprise user management module.
CN201110251690A 2011-08-30 2011-08-30 Heat radiating performance analysis and structure design system for tube and fin type radiator Pending CN102332041A (en)

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CN104748612A (en) * 2013-12-31 2015-07-01 中国石油天然气股份有限公司 Method and device for acquiring structural size of spiral baffle heat exchanger
CN104748612B (en) * 2013-12-31 2017-04-12 中国石油天然气股份有限公司 Method and device for acquiring structural size of spiral baffle heat exchanger
CN104069645A (en) * 2014-06-24 2014-10-01 韩慧聪 Film scraping distiller
CN104069645B (en) * 2014-06-24 2016-08-24 韩慧聪 A kind of scraped film type distillator
CN107526890A (en) * 2017-08-23 2017-12-29 美度汽车零部件股份有限公司 A kind of automobile radiators hyperboloid of one sheet radiating tube flow Field Design and structural optimization method
CN109614712A (en) * 2018-12-12 2019-04-12 东北大学 A kind of spiral winding tube type heat exchanger HEAT EXCHANGE ANALYSIS system
CN111353231A (en) * 2020-03-05 2020-06-30 闽南师范大学 Genetic algorithm-based LED radiator design method and system
CN111353231B (en) * 2020-03-05 2023-04-07 闽南师范大学 Genetic algorithm-based LED radiator design method and system
CN112345582A (en) * 2020-11-05 2021-02-09 福州大学至诚学院 Semiconductor refrigerating sheet performance parameter testing method
CN112345582B (en) * 2020-11-05 2024-05-28 福州大学至诚学院 Method for testing performance parameters of semiconductor refrigeration sheet
CN112989611A (en) * 2021-03-18 2021-06-18 北京理工大学 Radiator design calculation platform for vehicle battery heat dissipation
CN114662237A (en) * 2022-03-22 2022-06-24 中国核动力研究设计院 Method, system, terminal and medium for analyzing and correcting heat transfer characteristics of regenerative heat exchanger
CN114662237B (en) * 2022-03-22 2023-09-05 中国核动力研究设计院 Regenerative heat exchanger heat transfer characteristic analysis and correction method, system, terminal and medium

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