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Simulation method of plate-fin heat exchanger

A technology of heat exchanger and simulation method, applied in design optimization/simulation, instrumentation, electrical digital data processing, etc., to achieve the effect of reducing experimental work and high precision

Pending Publication Date: 2020-06-19
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

[0004] Aiming at the problem that the Fluent non-thermal equilibrium porous media model in the prior art fails to accurately consider the influence of fluid velocity and temperature changes in different heat dissipation channels on heat transfer, the present invention provides a simulation method for plate-fin heat exchangers

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  • Simulation method of plate-fin heat exchanger
  • Simulation method of plate-fin heat exchanger
  • Simulation method of plate-fin heat exchanger

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Embodiment Construction

[0056] The present invention will be further described below in conjunction with drawings and embodiments.

[0057] The invention provides a simulation method of a plate-fin heat exchanger, which can accurately consider the influence of fluid velocity and temperature changes in different heat dissipation channels on heat transfer, and provides a technical solution for the performance prediction of the plate-fin heat exchanger , to improve thermal simulation accuracy.

[0058] see figure 1 , a simulation method for a plate-fin heat exchanger, comprising:

[0059] S1, select the periodically repeating microstructure in the heat exchanger, and divide the microstructure into grids; select the representative periodic repeating microstructure in the heat exchanger, which is beneficial to reduce the number of grids and the calculation time cost ; When dividing the grid, the height of the first layer grid should be determined according to the specific working conditions, and the gri...

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Abstract

The invention relates to a simulation method for a plate-fin heat exchanger, and the method comprises the steps: S1, selecting a periodic repetitive microstructure in the heat exchanger, and carryingout the mesh generation of the microstructure; s2, simulating the microstructure by using different simulation conditions and corresponding fluid flow models to obtain unit length pressure drop and fin surface heat flux density under each simulation condition; s3, respectively constructing functions of the unit length pressure drop and the fin surface heat flux density relative to simulation conditions by utilizing a numerical fitting method; and based on the written Fluent UDF program, simulating the heat exchanger model under the required working condition to obtain the total pressure drop and the heat exchange amount of the inlet and the outlet. According to the invention, the influence of changes of fluid flow rates and temperatures in different heat dissipation flow channels on pressure drop and heat transfer is comprehensively considered, and compared with experimental data of a plurality of plate-fin heat exchangers, the simulation result has higher precision.

Description

technical field [0001] The invention relates to the technical field of performance prediction of plate-fin heat exchangers, in particular to a simulation method for plate-fin heat exchangers. Background technique [0002] Plate-fin heat exchangers are widely used in power machinery, chemical industry, energy and other fields, so the development of heat exchangers with excellent performance is conducive to energy saving and environmental protection. In the engineering research and development stage, when the CAD model of the heat exchanger is designed, it is always hoped to obtain data such as its resistance and total heat transfer before manufacturing, which is beneficial to know in advance whether the designed heat exchanger meets the performance requirements. Traditionally, some experimental correlations are always used for estimation, but such methods have large errors especially for heat exchangers with new structures. [0003] In recent years, the rapid development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F119/08G06F119/14
Inventor 苏峰华冯文营袁熙
Owner SOUTH CHINA UNIV OF TECH
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