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Meshless calculation method for performance of medium-deep buried double-pipe heat exchanger

A calculation method and heat exchanger technology, applied in geothermal energy, geothermal energy power generation, geothermal collectors, etc., can solve problems such as calculation methods that have not yet appeared in engineering application value, and achieve the effect of reducing calculation time and high economic benefits

Active Publication Date: 2019-06-07
XI AN JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

However, in the current process of using buried tube heat exchangers for geothermal energy utilization, there is no calculation method with engineering application value.

Method used

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  • Meshless calculation method for performance of medium-deep buried double-pipe heat exchanger
  • Meshless calculation method for performance of medium-deep buried double-pipe heat exchanger
  • Meshless calculation method for performance of medium-deep buried double-pipe heat exchanger

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Embodiment

[0067] like figure 2 As shown, a meshless calculation method for the performance of casing heat exchangers buried in medium and deep layers includes the following steps:

[0068] The specific method of the initial parameter setting part is: to obtain the number of control units of different diameter pipe sections of the ground-buried casing heat exchanger, the length of each pipe section, and the corresponding inner diameter of the inner pipe, outer diameter of the inner pipe, inner diameter of the outer pipe, outer pipe outside diameter. Obtain the thermophysical parameters of the inner and outer tubes of the buried casing heat exchanger, and the geotechnical thermophysical parameters of the location where the heat exchanger is located, including the main components of each rock layer, geothermal gradient, thermal conductivity, specific heat capacity, density, and distribution of aquifers.

[0069] The calculation method consists of an initial parameter setting part and a c...

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Abstract

The invention discloses a meshless calculation method for the performance of a medium-deep buried double-pipe heat exchanger. The meshless calculation method comprises an initial parameter setting part and a loop iteration calculation part. The loop iteration calculation part comprises the steps that parameters of a middle-deep buried heat exchanger structure are determined according to an actualheat exchange well structure, and meanwhile initial value calculation conditions are set according to the initial parameter setting part; the whole pipeline is divided into a plurality of control unitbodies along the length direction of the pipeline according to the actual length of the pipeline section, the position coordinates of the control unit bodies are determined, the total time length andthe time step length of the operation period are determined, and finally the setting of iteration conditions is completed; 4, the loop iteration calculation convergence judgment and result output arecarried out. The method is helpful for people to obtain integral understanding of physical parameters of all parts in the system operation process before engineering development, and theoretical guidance is provided for actual engineering. Application of the method can be completed before actual engineering development, and the method has the advantage of being easy to implement.

Description

technical field [0001] The invention relates to the technical field of heat exchanger design, in particular to a gridless calculation method for the performance of casing heat exchangers buried in middle and deep layers. Background technique [0002] With the increasingly prominent energy problems, the utilization of clean energy has attracted more and more attention. As a clean and sustainable energy, geothermal energy has been widely used. However, in the current process of using buried tube heat exchangers for geothermal energy utilization, there is no calculation method with engineering application value. Contents of the invention [0003] The purpose of the present invention is to provide a gridless calculation method for the performance of middle and deep buried casing heat exchangers with clear structure, perfect function and flexible input. This method is a calculation method suitable for simulation using computer language , to provide design parameters for pract...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50F24T10/17
CPCF24T10/17F24T2201/00Y02E10/10
Inventor 金立文蔡志强贾国圣孟祥兆赵民张联英马真迪
Owner XI AN JIAOTONG UNIV
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