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Nuclear power station voltage stabilizer electric heating element arrangement method based on three-dimensional transient heat transfer mechanism

A technology of electric heating element and arrangement method, which is applied in the direction of instrument, image data processing, computer-aided design, etc., can solve the lack of guiding role in the arrangement of electric heating element of the voltage stabilizer, and cannot reflect the flow field distribution and thermal stability of the voltage stabilizer. Hydraulic characteristics and other problems, to improve the effect of harsh working environment

Inactive Publication Date: 2020-11-27
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the mathematical model method cannot reflect the flow field distribution and thermal hydraulic characteristics in the voltage stabilizer, and lacks guidance for the arrangement of electric heating elements inside the voltage stabilizer

Method used

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  • Nuclear power station voltage stabilizer electric heating element arrangement method based on three-dimensional transient heat transfer mechanism
  • Nuclear power station voltage stabilizer electric heating element arrangement method based on three-dimensional transient heat transfer mechanism
  • Nuclear power station voltage stabilizer electric heating element arrangement method based on three-dimensional transient heat transfer mechanism

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Embodiment Construction

[0031] In order to verify and analyze the simulation effect of the nuclear power plant voltage stabilizer electric heating element arrangement method based on the three-dimensional transient heat transfer mechanism, the voltage stabilizer fluctuation research experimental device system that is selected to be built is used to verify the validity of the method of the present invention, and its simplified test Some experimental devices, such as figure 1shown. The experimental working conditions come from the thermal functional test data of the nuclear power plant, that is, when the wave enters, 50% of the space of the vertical wave tube and the barrel of the pressurizer is filled with thermal fluid, and the other 50% is the steam space, and the liquid and vapor phases are saturated. In the equilibrium state, the temperature of steam and coolant is equal to the saturation temperature of the rated operating pressure (corresponding to 15.5Mpa is 617.95K). Suddenly at a certain momen...

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Abstract

The invention discloses a nuclear power station voltage stabilizer electric heating element arrangement method based on a three-dimensional transient heat transfer mechanism. The method comprises thefollowing steps: firstly, carrying out reasonable three-dimensional modeling and mesh generation on the voltage stabilizer; cFD-based method, an RKE model is combined with a VOF multi-phase flow heattransfer model to carry out numerical simulation on a mixing phenomenon of cold and hot fluids in the voltage stabilizer during positive fluctuation; and finally, carrying out time-mean-square dimensionless and root-mean-square dimensionless processing on a numerical simulation result to represent the average value and fluctuation condition of the speed and the temperature in the mixing process. The accurate range of reasonable arrangement of the electric heating elements in the lower end socket of the voltage stabilizer is obtained by analyzing the fluctuation intensity of the speed and the temperature; according to the method, the flow characteristics and the heat transfer characteristics of the coolant in the wave-in process of the voltage stabilizer are analyzed from the perspective ofnumerical simulation, the accurate range of reasonable arrangement of the electric heating elements in the lower end socket of the voltage stabilizer is obtained, and reference is provided for arrangement optimization of the electric heating elements in actual engineering.

Description

technical field [0001] The invention relates to a technology in the field of nuclear power plant intelligent control, in particular to a method for arranging electric heating elements of a nuclear power plant voltage stabilizer based on a three-dimensional transient heat transfer mechanism. Background technique [0002] The voltage stabilizer is the main equipment of the pressure safety system of the pressurized water reactor nuclear power plant, and the electric heater is the core component of the voltage stabilizer equipment. High water pressure, instantaneous extreme temperature change, high radiation dose, long-term stable operation and other harsh tests. Once the electric heater fails, it will affect the ability of the power plant to maintain and control the operating pressure of the reactor coolant system, and even cause the primary circuit to shut down due to overpressure. At present, the electric heating elements of the pressurized water reactor voltage regulator of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/00G06F119/08
CPCG06T17/00G06F30/20G06F2119/08
Inventor 张继国陈勇郝达荣殷智峰宋长远陈大玮唐旭张煜坤
Owner SHANGHAI JIAO TONG UNIV
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