CN110489835A - Gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software - Google Patents
Gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 52
- 238000009423 ventilation Methods 0.000 title claims abstract description 44
- 238000009825 accumulation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 16
- 239000004035 construction material Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 6
- 230000001052 transient effect Effects 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000001808 coupling effect Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000005477 standard model Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000005338 heat storage Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
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- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a kind of gravity-flow ventilations based on Ansys software and wall accumulation of heat coupled simulation method, the following steps are included: (1), establish using the Designer model module in Ansys workbench software the three-dimensional simulation model of room building and entrance, rebreather, and set relevant parameter；(2), three-dimensional simulation model is subjected to grid dividing；(3), the good three-dimensional simulation model of grid dividing is imported into Ansys Fluent module and be configured；(4), test point and detection faces are set, and carries out simulation calculating and obtains simulation result；(5), under the conditions of identical setting, pass through setting different parameters and repeat step (1)-(4), calculated with carrying out repeatedly simulation.The present invention can determine that the heat storage capacity of wall, can preferably measure heat storage capacity, can reduce experimental cost.
Description
Technical field
The present invention relates to building energy conservation, fluid structurecoupling analogy method field, specifically a kind of natures based on Ansys software
Ventilation and wall accumulation of heat coupled simulation method.
Background technique
In recent years, energy problem had attracted more and more attention from people, and there is 16,000,000,000 square metres of newly constructed house face in China every year
Product be energy utilization rate only 33% highly energy-consuming building, building total energy consumption accounts for the one third of national total energy consumption, develops green and build
It builds very urgent.Energy utilization rate can be increased substantially using passive type technology.
Gravity-flow ventilation is to promote air by hot pressing caused by wind pressure and indoor and outdoor air temperature difference caused by outdoor wind-force
Flowing, so that the outer air exchange of architecture indoor.Since the factor for influencing gravity-flow ventilation is more, and mostly uncertain factor, it is existing
Some is in the theoretical primary stage for the research of gravity-flow ventilation influence factor, is coupled by gravity-flow ventilation with wall accumulation of heat
Simulation, is arranged different Variable Conditions, analyzes the effect that ventilation is coupled with accumulation of heat under a variety of situations.
In order to solve the problems, such as that experiment is difficult, data are inadequate, pass through method and the practical operation phase of Computer Numerical Simulation
In conjunction with establishing the factors such as Different climate area, different construction material, different ventilation time section combinations and macro property
Relational model theoretically predicts the influence of ventilation time section, Different climate area, different construction materials to building accumulation of heat.
So as to reduce experimental cost, optimization design provides theories integration to reduce building energy consumption, also grinds for relevant numerical simulation
Offer foundation is provided.
Summary of the invention is the purpose of the present invention is overcoming the energy-saving and environment-friendly deficiency of prior art architectural design, not based on China
With climatic province characteristic feature, in conjunction with different building types, to different buildings, whether there is or not gravity-flow ventilations to carry out energy-saving potential research, provides
A kind of gravity-flow ventilation based on Ansys software and wall accumulation of heat coupled simulation method.
In order to achieve the above object, the technical scheme adopted by the invention is as follows:
Gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: the following steps are included:
(1), the three of room building and entrance are established using the Designer model module in Ansys workbench software
Simulation model is tieed up, while establishing the three-dimensional simulation model of rebreather in room building, and set all three-dimensional simulation models
Relevant parameter；
(2), to be transmitted to Ansys workbench soft for the three-dimensional simulation model of the room building and rebreather established step (1)
In the mechanical module of part, net is carried out to three-dimensional simulation model using Multizone mode in mechanical module
Lattice divide；
(3), the good three-dimensional simulation model of step (2) grid dividing is imported to the Ansys of Ansys workbench software
Fluent module, and Ansys Fluent module is configured；
(4), test point and detection faces are set in the Results module in Ansys workbench software, and are emulated
Operation obtains simulation result, couples index with wall accumulation of heat in this, as gravity-flow ventilation；
(5), under the conditions of identical setting, by by three-dimensional simulation model be arranged different parameters and repeat step (1)-(4), with into
Row repeatedly simulation calculate, by the temperature variation curve of indoor test point, the temperature cloud picture of detection faces, detection faces air current composition cloud
Scheme the index being distributed as evaluation ventilation with wall accumulation of heat coupling effect and air current composition, determines that the wall of optimization stores with this
Thermal energy power and Airflow Pattern Designing.
The gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: step
(1) relevant parameter set in includes at least: room shape, room-sized, wall wall thickness, air return method, air inlet size, row
Air ports size.
The gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: step
(3) in, the process being configured to Ansys Fluent module is as follows:
(3.1), the customized temperature parameter worked out according to climatic province is imported in User Defined option；
(3.2), in General option, by the direction y Gravitational Acceleration according to requiring to be set as pre-
If value, time option are set as Transient Transient Heat Transfer；
(3.3), the Energy in Models option is chosen into Energy Equation, is chosen in Viscous Models option
K-epsilon Standard model；
(3.4) air is selected in Materials Fluid option portion, Solid option is set as selected construction material；
(3.5), the part Fluid is set as air in Cell Zone Conditions option, the part Solid is set as selected
Construction material；
(3.6), inlet porting boundary condition is velocity-inlet in Boundary Conditions option, and will
Velocity Magnitude is set as preset value according to actual requirement, and Thermal option is set as UDF tm-inlet, setting
Export boundary condition is pressure-outlet, sets heat convection face for a side walls, UDF defines inner wall per hour
Air comprehensive temperature value, convection transfer rate are set as preset value according to actual requirement, other wall surfaces are set as adiabatic wall；
(3.6), it is calculated after selecting check case.
The gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: step
(4) in, select the central point of room building three-dimensional simulation model as test point, detection faces were the x direction plane of central point.
The gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: step
(4) simulation result described in includes: the temperature variation curve of test point, the speed cloud atlas of detection faces, the temperature cloud picture of detection faces.
Compared with prior art, advantage of the present invention are as follows:
(1) the problem of coupling about gravity-flow ventilation with wall accumulation of heat, previous method are usually all single carry out wall tests.
The present invention creatively determines wall using the temperature variation curve and the temperature cloud pictures of detection faces of monitoring point, speed cloud atlas
Heat storage capacity, can preferably measure heat storage capacity.
(2) method combined by numerical simulation with practical operation establishes Wall model, material parameter, different ventilations
The relational model of the factors such as period and macro property, theoretically prediction ventilation period, different accumulation of heat materials for walls, difference are divulged information
Influence of the speed to indoor thermal environment, so as to reduce experimental cost.
(3) method of the present invention can obtain different time sections gravity-flow ventilation and wall accumulation of heat coupling, gravity-flow ventilation and different materials
Temperature, the speed distribution regularities of the coupling of accumulation of heat wall are expected, thus for the selection in gravity-flow ventilation period, construction to material
Reference is provided.
Detailed description of the invention
Fig. 1 is the threedimensional model schematic diagram established in analogy method of the present invention.
Fig. 2 is the selection schematic diagram of monitoring point of the present invention, detection faces.
Fig. 3 is the temperature cloud picture schematic diagram of different ventilation time detection faces of the invention.
Fig. 4 is the monitoring face velocity cloud atlas schematic diagram of different ventilation time sections of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment is described with reference to Fig. 1, the Ansys Fluent's described in present embodiment based on Ansys Fluent
Gravity-flow ventilation and wall accumulation of heat coupled simulation method.
Step 1: the Designer model module in Ansys workbench software establishes room and entrance
Model.(as shown in Figure 1) wherein, room is rectangle, and length, width and height size, wall wall thickness are set etc., there is rebreather in inside, uses
The mode of sidewall air supply lower part return air.Under the premise of not influencing to test accuracy, zoomed in and out according to realistic model, Ke Yiji
The earth reduction actual conditions, reduce experiment difficulty.
Step 2: room building and the three-dimensional simulation model of rebreather are transmitted to Ansys workbench software
In mechanical module；
Grid dividing is carried out to model, CFD Multizone mode is chosen and grid dividing is carried out to model, so that result is more smart
Really.
Step 3: the good model of grid dividing is imported into Ansys Fluent module, Fluent module is configured；
1, the customized temperature parameter worked out according to climatic province is imported in User Defined；
2, the direction y Gravitational Acceleration in General is set, and time is set as Transient transient state biography
Heat；
3, it is arranged in Models and energy state equation is set, and selects turbulence model for k-epsilon Standard model；
4, the part setting Materials Fluid selection air, Solid are set as selected construction material；
5, the part Fluid is set as air by setting Cell Zone Conditions, and the part Solid is set as selected building wall
Body material；
6, setting Boundary Conditions inlet porting boundary condition is that Velocity is arranged in velocity-inlet
Magnitude(can be according to the setting of experiment concrete condition), Thermal is set as UDF tm-inlet, and export boundary condition is arranged
It is set as heat convection face for pressure-outlet, Jiang Dongqiang, UDF defines inner wall air comprehensive temperature value per hour；
7, it is calculated after check case.
Step 4；It carries out simulation calculating and obtains simulation result, couple index with wall accumulation of heat in this, as gravity-flow ventilation；
Monitoring point and detection faces (as shown in Figure 2) are set in Results, and the simulation result includes: that the temperature change of monitoring point is bent
Line, the speed cloud atlas of detection faces, the temperature cloud picture of detection faces.
Step 5: different ventilation time sections, wall different materials and different wind speed are respectively set, in identical setting condition
It is lower progress repeatedly simulation calculate, by the temperature variation curve of indoor test point, the temperature cloud picture of detection faces, detection faces air-flow group
The index that cloud atlas is distributed as evaluation ventilation with wall accumulation of heat coupling effect and air current composition is knitted, the wall of optimization is determined with this
Body heat storage capacity and Airflow Pattern Designing.
Ventilation time section is defined by udf, materials for wall, entrance boundary velocity- are selected in Materials
Change wind speed size in inlet it can be concluded that changing rule under gravity-flow ventilation is coupled with wall accumulation of heat under different variable.Comparison three
Kind material, temperature variation curve trend is identical, but different materials building heat storage capacity is different.To sum up, add gas material to temperature
Variation has time-lag action, it will be seen that gas material is added to have good heat insulation effect.Compared with brick setting, fly ash material,
Heat storage performance is more superior；It is shown from the temperature cloud picture schematic diagram (as shown in Figure 3) of different ventilation time detection faces warm in room
Degree is obviously unevenly distributed.The regional temperature difference is larger；From the speed cloud atlas schematic diagrames of different ventilation time section detection faces (such as Fig. 4 institute
Show) display ventilation and all there is indoor central point and room quadrangle speed air flow are lower and almost nil when not divulging information
Situation, illustrating the air current composition in the room, there are unreasonable places.For the simulation result for verifying Ansys, should repeatedly simulate, than
Compared with analysis experimental result, the preferred plan that gravity-flow ventilation is coupled with wall accumulation of heat is obtained.
Embodiment of the present invention is only the description carried out to the preferred embodiment of the present invention, not to the present invention
Conception and scope is defined, and under the premise of not departing from design philosophy of the present invention, engineers and technicians are to this hair in this field
The all variations and modifications that bright technical solution is made should all fall into protection scope of the present invention, the claimed skill of the present invention
Art content, is all described in the claims.
Claims (5)
1. gravity-flow ventilation and wall accumulation of heat coupled simulation method based on Ansys software, it is characterised in that: the following steps are included:
(1), the three of room building and entrance are established using the Designer model module in Ansys workbench software
Simulation model is tieed up, while establishing the three-dimensional simulation model of rebreather in room building, and set all three-dimensional simulation models
Relevant parameter；
(2), to be transmitted to Ansys workbench soft for the three-dimensional simulation model of the room building and rebreather established step (1)
In the mechanical module of part, net is carried out to three-dimensional simulation model using Multizone mode in mechanical module
Lattice divide；
(3), the good three-dimensional simulation model of step (2) grid dividing is imported to the Ansys of Ansys workbench software
Fluent module, and Ansys Fluent module is configured；
(4), test point and detection faces are set in the Results module in Ansys workbench software, and are emulated
Operation obtains simulation result, couples index with wall accumulation of heat in this, as gravity-flow ventilation；
(5), under the conditions of identical setting, by by three-dimensional simulation model be arranged different parameters and repeat step (1)-(4), with into
Row repeatedly simulation calculate, by the temperature variation curve of indoor test point, the temperature cloud picture of detection faces, detection faces air current composition cloud
Scheme the index being distributed as evaluation ventilation with wall accumulation of heat coupling effect and air current composition, determines that the wall of optimization stores with this
Thermal energy power and Airflow Pattern Designing.
2. the gravity-flow ventilation according to claim 1 based on Ansys software and wall accumulation of heat coupled simulation method, feature
Be: the relevant parameter set in step (1) includes at least: room shape, room-sized, wall wall thickness, air return method, air inlet
Mouth size, exhaust outlet size.
3. the gravity-flow ventilation according to claim 1 based on Ansys software and wall accumulation of heat coupled simulation method, feature
Be: in step (3), the process being configured to Ansys Fluent module is as follows:
(3.1), the customized temperature parameter worked out according to climatic province is imported in User Defined option；
(3.2), in General option, by the direction y Gravitational Acceleration according to requiring to be set as pre-
If value, time option are set as Transient Transient Heat Transfer；
(3.3), the Energy in Models option is chosen into Energy Equation, is chosen in Viscous Models option
K-epsilon Standard model；
(3.4) air is selected in Materials Fluid option portion, Solid option is set as selected construction material；
(3.5), the part Fluid is set as air in Cell Zone Conditions option, the part solid is set as selected
Construction material；
(3.6), inlet porting boundary condition is velocity-inlet in Boundary Conditions option, and will
Velocity Magnitude is set as preset value according to actual requirement, and Thermal option is set as udf tm-inlet, setting
Export boundary condition is pressure-oulet, sets heat convection face for a side walls, inner wall is empty per hour for UDF definition
Gas integrated temperature value, convection transfer rate are set as preset value according to actual requirement, other wall surfaces are set as adiabatic wall；
(3.6), it is calculated after selecting check case.
4. the gravity-flow ventilation according to claim 1 based on Ansys software and wall accumulation of heat coupled simulation method, feature
It is: in step (4), selects the central point of room building three-dimensional simulation model as test point, detection faces were the X of central point
Direction plane.
5. the gravity-flow ventilation according to claim 1 based on Ansys software and wall accumulation of heat coupled simulation method, special
Sign is: simulation result described in step (4) includes: the temperature variation curve of test point, the speed cloud atlas of detection faces, detection faces
Temperature cloud picture.
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Cited By (7)
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| CN111400958A (en) * | 2020-04-15 | 2020-07-10 | 天华化工机械及自动化研究设计院有限公司 | ANSYS-based simulation method for oxygen content distribution of high-temperature carbonization furnace |
| CN111400934A (en) * | 2020-04-15 | 2020-07-10 | 天华化工机械及自动化研究设计院有限公司 | Method for simulating oxygen content distribution of low-temperature carbonization furnace based on WORKBENCH |
| CN111651908A (en) * | 2020-07-17 | 2020-09-11 | 天华化工机械及自动化研究设计院有限公司 | ANSYS-based multi-field coupling stress distribution simulation method for high-temperature carbonization furnace |
| CN112446177A (en) * | 2020-11-16 | 2021-03-05 | 天华化工机械及自动化研究设计院有限公司 | Simulation method for heat insulation performance of external heat insulation material of high-temperature carbonization furnace |
| CN112528380A (en) * | 2020-12-18 | 2021-03-19 | 深圳供电局有限公司 | Method and system for optimizing ventilation environment of electric room |
| CN113591410A (en) * | 2021-08-06 | 2021-11-02 | 哈尔滨工业大学 | Monitoring data assimilation method for visualization of museum exhibition space airflow organization |
| WO2022099716A1 (en) * | 2020-11-16 | 2022-05-19 | 天华化工机械及自动化研究设计院有限公司 | Method for simulating thermal insulation property of external thermal insulation material of high-temperature carbonization furnace |
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| CN111400958A (en) * | 2020-04-15 | 2020-07-10 | 天华化工机械及自动化研究设计院有限公司 | ANSYS-based simulation method for oxygen content distribution of high-temperature carbonization furnace |
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| CN112446177A (en) * | 2020-11-16 | 2021-03-05 | 天华化工机械及自动化研究设计院有限公司 | Simulation method for heat insulation performance of external heat insulation material of high-temperature carbonization furnace |
| WO2022099716A1 (en) * | 2020-11-16 | 2022-05-19 | 天华化工机械及自动化研究设计院有限公司 | Method for simulating thermal insulation property of external thermal insulation material of high-temperature carbonization furnace |
| CN112446177B (en) * | 2020-11-16 | 2023-01-03 | 天华化工机械及自动化研究设计院有限公司 | Simulation method for heat insulation performance of external heat insulation material of high-temperature carbonization furnace |
| CN112528380A (en) * | 2020-12-18 | 2021-03-19 | 深圳供电局有限公司 | Method and system for optimizing ventilation environment of electric room |
| CN113591410A (en) * | 2021-08-06 | 2021-11-02 | 哈尔滨工业大学 | Monitoring data assimilation method for visualization of museum exhibition space airflow organization |
| CN113591410B (en) * | 2021-08-06 | 2024-03-19 | 哈尔滨工业大学 | Monitoring data assimilation method for visualization of museum exhibition space airflow organization |
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