CN106339535A - Method for calculating pore diameter of in-built throttling pore plate of U-shaped tube type heat exchanger - Google Patents
Method for calculating pore diameter of in-built throttling pore plate of U-shaped tube type heat exchanger Download PDFInfo
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- CN106339535A CN106339535A CN201610690573.0A CN201610690573A CN106339535A CN 106339535 A CN106339535 A CN 106339535A CN 201610690573 A CN201610690573 A CN 201610690573A CN 106339535 A CN106339535 A CN 106339535A
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- shaped tube
- restricting orifice
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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Abstract
The invention relates to a method for calculating the pore diameter of an in-built throttling pore plate of a U-shaped tube type heat exchanger. The U-shaped tube type heat exchanger is widely applied in petroleum, chemical and electric power industries. In order to guarantee that the amount of water passing through the U-shaped tube type heat exchanger is proper, a method for using an external throttling pore plate and the U-shaped tube type heat exchanger in parallel is adopted in the design. The method for calculating the pore diameter of the in-built throttling pore plate of the U-shaped tube type heat exchanger comprises the following steps: firstly, calculating the pressure loss of a U-shaped tube by a fluid mechanics on-way resistance formula; secondly, establishing a U-shaped tube type heat exchanger tube pass fluid domain model in CFX software, dividing grids and giving boundary conditions; thirdly, defining the range of the pore diameter of the throttling pore plate (1) as variable, and defining 'the simulated U-shaped tube pressure loss is equal to the theoretically calculated U-shaped tube pressure loss' and 'the flow distribution proportion of the simulated U-shaped tube and the in-built throttling pore plate reaches a design value' as two constraint conditions. The method is applied to calculation of the pore diameter of the throttling pore plate in the tube type heat exchanger.
Description
Technical field:
The present invention relates to a kind of computational methods in the built-in restricting orifice aperture of u-type heat exchanger.
Background technology:
U-type heat exchanger is widely used in oil, chemical industry and power industry.In order to ensure by u-type heat exchanger
The water yield is suitable, can be by the way of external restricting orifice and u-type heat exchanger are used in parallel in design.Although this mode can
To guarantee the performance of u-type heat exchanger and whole loop, but easily cause u-type heat exchanger bypass greatly
The waste of pipeline；Meanwhile, this arrangement also makes system become relative complex, difficult in maintenance, increased the budget of user
Expenditure.For ensureing overal system design rationally, heat transfer effect reaches design requirement, cost-effective, using the built-in restricting orifice of band
U-type heat exchanger, to solve the deficiency that external restricting orifice exists.But, the built-in throttle orifice for u-type heat exchanger
The Size calculation of panel aperture, there is no suitable theoretical calculation method.Present invention seek to address that this problem.
Content of the invention:
It is an object of the invention to provide a kind of computational methods in the built-in restricting orifice aperture of u-type heat exchanger.
Above-mentioned purpose is realized by following technical scheme:
A kind of computational methods in the built-in restricting orifice aperture of u-type heat exchanger, this step includes: first, by hydrodynamics edge
Journey resistance formula calculates the pressure loss of u-shaped pipe；Secondly, cfx software is set up u-type heat exchanger tube side fluid domain mould
Type, grid division given boundary condition, again, the scope defining restricting orifice aperture, as variable, defines ' the u-shaped of simulation
Pipe pressure loses equal with the u-shaped pipe pressure loss of theoretical calculation ' and ' the u-shaped pipe of simulation and the flow of built-in restricting orifice
Allocation proportion reaches design load ' as two constraintss, finally, repeatedly call cfx software to carry out not using isight software
With the simulation in aperture, until being met the pore size of the built-in restricting orifice of constraints.
The computational methods in described u-type heat exchanger built-in restricting orifice aperture, on-way resistance formula is darcy-Wei Si
Bach's formula.
The computational methods in described u-type heat exchanger built-in restricting orifice aperture, the simulation that cfx software is completed exists
Realize on ansys workbench platform.
The computational methods in the built-in restricting orifice aperture of described u-type heat exchanger, using isight software and cfx software
In conjunction with solving the problems, such as that built-in restricting orifice aperture there is no theoretical calculation method.
Beneficial effects of the present invention:
1. the present invention there is no suitable theoretical calculation method for the size in u-type heat exchanger built-in restricting orifice aperture, this
Invent with Fluid Mechanics Computation and optimized algorithm as theoretical foundation, with cfdrc and optimization software as instrument, can
Accurately to obtain the size in u-type heat exchanger built-in restricting orifice aperture；Meanwhile, this calculating is made using porous media simulation
Method can adapt to a fairly large number of situation of u-shaped pipe.
Isight of the present invention is a large-scale optimization software, can call office software, three-dimensional software and simulation software
Deng；The simulation that cfx is completed is realized on ansys workbench platform, using isight software optimization function to whole
Calculating process is controlled, and when heat exchanger tube quantity is more, can complete to calculate using the method for porous media simulation.
Brief description:
Accompanying drawing 1 u-type heat exchanger tube side fluid fluidal texture schematic diagram.
Accompanying drawing 2 is the schematic flow sheet of the inventive method.
Specific embodiment:
Embodiment 1:
A kind of computational methods in the built-in restricting orifice aperture of u-type heat exchanger, this step includes: first, by hydrodynamics edge
Journey resistance formula calculates the pressure loss of u-shaped pipe；Secondly, cfx software is set up u-type heat exchanger tube side fluid domain mould
Type, grid division given boundary condition, again, the scope defining restricting orifice 1 aperture, as variable, defines ' the u-shaped of simulation
Pipe pressure loses equal with the u-shaped pipe pressure loss of theoretical calculation ' and ' the u-shaped pipe of simulation and the flow of built-in restricting orifice
Allocation proportion reaches design load ' as two constraintss, finally, repeatedly call cfx software to carry out not using isight software
With the simulation in aperture, until being met the pore size of the built-in restricting orifice of constraints.
Embodiment 2:
The computational methods in the built-in restricting orifice of the u-type heat exchanger according to embodiment 1 aperture, on-way resistance formula is to reach
West-Wei's Si Bahe formula.
Embodiment 3:
The computational methods in the built-in restricting orifice of the u-type heat exchanger according to embodiment 1 or 2 aperture, cfx software is completed
Simulation realize on ansys workbench platform.
Embodiment 4:
The computational methods in the u-type heat exchanger built-in restricting orifice aperture according to embodiment 1 or 2 or 3, using isight
The combination of software and cfx software solves the problems, such as that built-in restricting orifice aperture there is no theoretical calculation method.
Embodiment 5:
The computational methods in the u-type heat exchanger built-in restricting orifice aperture according to embodiment 1 or 2 or 3 or 4, isight
It is a large-scale optimization software, office software, three-dimensional software and simulation software etc. can be called；The simulation that cfx is completed exists
Realize on ansys workbench platform.
Embodiment 6:
The computational methods in the u-type heat exchanger built-in restricting orifice aperture according to embodiment 1 or 2 or 3 or 4 or 5. push away
The large artificial integrating various analysis modules (as structural analysis, fluid analysis, heat analysis and emi analysis etc.) going out is put down
Platform, an integrated fluid analysis module of cfx.
Embodiment 7:
Darcy-Wei's Si Bahe formula:
λ in formula is referred to as frictional resistant coefficient, and dimensionless is relatively crude with the wall of the viscosity, Reynolds number re and pipeline of fluid
Rugosity is relevant；L is the length of pipe, and d is the diameter (for on-circular cross-section pipe, d is equivalent diameter) of pipe, and v is having of pipe
Mean flow rate on effect section.
Claims (4)
1. the computational methods in the built-in restricting orifice aperture of a kind of u-type heat exchanger, is characterized in that: this step includes: first, by
Hydrodynamics on-way resistance formula calculates the pressure loss of u-shaped pipe；Secondly, cfx software is set up u-type heat exchanger tube side
Fluid domain model, grid division given boundary condition, again, the scope defining restricting orifice aperture, as variable, defines ' mould
The u-shaped pipe pressure loss intended is equal with the u-shaped pipe pressure loss of theoretical calculation ' and ' the u-shaped pipe of simulation and built-in restricting orifice
Assignment of traffic ratio reach design load ' as two constraintss, finally, repeatedly call cfx software using isight software
Carry out the simulation of different pore size, until being met the pore size of the built-in restricting orifice of constraints.
2. the computational methods in the built-in restricting orifice aperture of u-type heat exchanger according to claim 1, is characterized in that: edge
Journey resistance formula is darcy-Wei Si Bahe formula ().
3. the computational methods in the built-in restricting orifice aperture of u-type heat exchanger according to claim 1 and 2, is characterized in that:
The simulation that cfx software is completed is realized on ansys workbench platform.
4. the computational methods according to claim 1 or the built-in restricting orifice of u-type heat exchanger described in 2 or 3 aperture, its feature
It is: solve the problems, such as that built-in restricting orifice aperture there is no theoretical calculation method using the combination of isight software and cfx software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610690573.0A CN106339535A (en) | 2016-08-20 | 2016-08-20 | Method for calculating pore diameter of in-built throttling pore plate of U-shaped tube type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610690573.0A CN106339535A (en) | 2016-08-20 | 2016-08-20 | Method for calculating pore diameter of in-built throttling pore plate of U-shaped tube type heat exchanger |
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| CN106339535A true CN106339535A (en) | 2017-01-18 |
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| CN201610690573.0A Pending CN106339535A (en) | 2016-08-20 | 2016-08-20 | Method for calculating pore diameter of in-built throttling pore plate of U-shaped tube type heat exchanger |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013110145A1 (en) * | 2012-01-27 | 2013-08-01 | Mindcet Bvba | Method and system for calculating model parameters for a coil to be modelled |
| CN104236340A (en) * | 2014-09-05 | 2014-12-24 | 常熟市佳泰金属材料有限公司 | U-shaped pipe heat exchanger with easily-dismounted pipe bundle |
| CN105202948A (en) * | 2015-10-14 | 2015-12-30 | 东南大学 | Reverse flow type spiral baffle plate U-shaped pipe bundle heat exchanger |
-
2016
- 2016-08-20 CN CN201610690573.0A patent/CN106339535A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013110145A1 (en) * | 2012-01-27 | 2013-08-01 | Mindcet Bvba | Method and system for calculating model parameters for a coil to be modelled |
| CN104236340A (en) * | 2014-09-05 | 2014-12-24 | 常熟市佳泰金属材料有限公司 | U-shaped pipe heat exchanger with easily-dismounted pipe bundle |
| CN105202948A (en) * | 2015-10-14 | 2015-12-30 | 东南大学 | Reverse flow type spiral baffle plate U-shaped pipe bundle heat exchanger |
Non-Patent Citations (1)
| Title |
|---|
| 王志坚等: ""蒸汽冷却器内置节流孔板孔径设计方法初探"", 《电站辅机》 * |
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Application publication date: 20170118 |