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Full three-dimensional coupling simulation method of shell and tube heat exchanger based on finite volume theory

A heat exchanger, limited volume technology, applied in the field of full three-dimensional coupled simulation of shell-and-tube heat exchangers, can solve problems such as the difficulty of fine simulation of heat exchangers, achieve flexible structural design and optimization, reduce the amount of calculation, and reduce the difficulty of building Effect

Active Publication Date: 2022-03-22
XI AN JIAOTONG UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

Although computer computing power has greatly improved in recent years, it is still difficult to perform detailed simulations of heat exchangers based on finite volume theory

Method used

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  • Full three-dimensional coupling simulation method of shell and tube heat exchanger based on finite volume theory
  • Full three-dimensional coupling simulation method of shell and tube heat exchanger based on finite volume theory
  • Full three-dimensional coupling simulation method of shell and tube heat exchanger based on finite volume theory

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Embodiment Construction

[0037] The following combination figure 1The flow chart shown in the figure takes the simulation of the shell-and-tube Chinese experimental fast reactor intermediate heat exchanger as an example to further describe the present invention in detail. The CFD software here uses Fluent, and the user uses other CFD software.

[0038] A full three-dimensional coupled simulation method for shell-and-tube heat exchangers based on finite volume theory, including a solid modeling method for shell-and-tube heat exchangers, and a data exchange method for the primary shell side and the secondary tube side of the shell-and-tube heat exchanger 1. There are three parts to the calculation method of the heat transfer capacity of the shell and tube heat exchanger. The specific steps are as follows:

[0039] Step 1: First, geometrically simplify the heat transfer tube bundle area of ​​the shell-and-tube heat exchanger, ignoring the dense heat exchange tube bundles, baffles, and small structures of...

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Abstract

The invention discloses a full three-dimensional coupling simulation method of a shell-and-tube heat exchanger based on finite volume theory, which comprises the following steps: using geometric modeling software to perform geometric modeling on the shell-and-tube heat exchanger; using grid division software to The geometric model of the shell-and-tube heat exchanger is meshed to form a mesh model; the mesh model is imported into the CFD software, and the mesh of the heat transfer tube bundle area is copied in situ as the mesh of the secondary tube side, and the splicing surface method is used to The grid on the secondary tube side and the grid on the secondary side inlet and outlet area are connected; set user-defined variables in the CFD software, and use user-defined functions to establish a mapping relationship between the grids on the primary and secondary sides; The flow field information of the grid control body on the secondary side is used to calculate the heat transfer between the corresponding grid control bodies; the user-defined function of the CFD software is used to return the heat transfer to the source term of the energy equation; finally, the CFD software is used for iterative calculation. The invention can realize the coupling heat transfer calculation of the primary and secondary sides of the shell and tube heat exchanger with relatively low calculation cost.

Description

technical field [0001] The invention relates to the technical field of shell-and-tube heat exchanger simulation, in particular to a full three-dimensional coupled simulation method for shell-and-tube heat exchangers based on finite volume theory. Background technique [0002] Heat exchangers are widely used in engineering and technical fields such as energy, power, nuclear energy, petroleum, manufacturing, chemical and processing, such as feed heat exchangers, evaporators, condensers, reboilers, regenerators, etc. The shell-and-tube heat exchanger is a wall-type heat exchanger that uses the wall of the tube bundle enclosed in the shell as the heat transfer surface. The heat exchanger has a simple structure, low cost, and a wide flow section, which is easy to clean scale and can be used at high temperature and high pressure It is used under the environment, accounting for about 30% of the entire heat exchanger market, and is one of the most widely used types of heat exchanger...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/367G06F119/08
Inventor 张大林王心安周磊王式保秋穗正田文喜苏光辉
Owner XI AN JIAOTONG UNIV
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