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Heat transfer limit modeling method for composite capillary core thermal column

A modeling method and capillary core technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems affecting real-time performance of simulation, and achieve good robustness.

Inactive Publication Date: 2019-10-08
GUANGDONG TECHN COLLEGE OF WATER RESOURCES & ELECTRIC ENG
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Problems solved by technology

As the number of control volumes increases, the dimension of the model increases more (usually 3 to 4 times the number of control volumes), which affects the real-time performance of the simulation

Method used

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  • Heat transfer limit modeling method for composite capillary core thermal column
  • Heat transfer limit modeling method for composite capillary core thermal column
  • Heat transfer limit modeling method for composite capillary core thermal column

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0020] A heat transfer limit modeling method of a composite capillary core heat column is characterized in that it includes the following steps: Step 1, according to the thermodynamic state equation of the working fluid in the tube, respectively derive the partial differential equation of the enthalpy of the working fluid in the tube with the tube length and time Step 2, bringing the partial differential equation gained in step 1 into the energy conservation equation of working medium in the tube; Step 3, utilizing the dynamic process characteristics of the enthalpy-temperature channel of the single-phase heating tube, simultaneously separating the space-time two-dimen...

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Abstract

The invention discloses a heat transfer limit modeling method for a composite capillary core thermal column, which comprises the following steps of: step 1, respectively exporting partial differentialequations of enthalpy values of working media in a pipe along with pipe length and time according to a thermodynamic state equation of the working media in the pipe; step 2, substituting the partialdifferential equation obtained in the step 1 into an energy conservation equation of the working medium in the pipe; step 3, using dynamic process characteristics of the single-phase heated tube enthalpy-temperature channel to separate space and time two-dimensionally in the equation obtained in step 2; adopting a method of combining analysis and lumped parameters and acquiring a dynamic equationof the heat release amount of the pipe wall to the working medium in the pipe through integration. The method can be used for constructing a single-phase heated pipe simulation mathematical model andeffectively improve the single-section precision of a lumped parameter dynamic mathematical model.

Description

technical field [0001] The invention belongs to the technical field of thermal process modeling, in particular to a modeling method for heat transfer limit of a composite capillary core heat column. Background technique [0002] In the field of thermal process modeling, the equipment is usually simplified to a physical model that is convenient for modeling. The single-phase heat receiving tube is a physical model in which the heat transfer medium does not undergo phase change, including: working medium outside the tube (such as flue gas), Metal tube wall, working medium (such as steam or water) in the tube. During the dynamic process, the temperature of the working fluid and the tube wall changes with time, producing heat storage and exothermic effects, absorbing or releasing a part of additional heat; temperature changes cause changes in the working fluid density and storage capacity in the tube, and also affect the heat transfer process through parameters such as flow rate...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/08G06F30/20
Inventor 陶素连
Owner GUANGDONG TECHN COLLEGE OF WATER RESOURCES & ELECTRIC ENG
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