Numerical Model Establishment Method of Shell-and-Tube Heat Exchanger in Nuclear Power System under Motion Conditions

Abstract

A method for establishing a numerical model of a shell-and-tube heat exchanger in a nuclear power system under motion conditions, which is applicable to the establishment of a three-dimensional numerical calculation model for large-scale heat exchange equipment in a nuclear power system under certain external forces and different forms of motion; The three-dimensional numerical calculation model is mainly based on the three-dimensional thermal-hydraulic numerical calculation model of the shell-and-tube heat exchanger under static operation. The shell heat exchanger performs motion decomposition, single motion force analysis and decomposition, the establishment of additional force source term acting on the momentum equation under single motion, and the synthesis process of compound motion additional force source term, and finally establishes a set that can accurately describe the compound motion. Numerical calculation model of thermal-hydraulic characteristics of shell-and-tube heat exchanger in nuclear power system under motion conditions.

Description

technical field [0001] The present invention relates to the technical field of a numerical calculation model describing a shell-and-tube heat exchanger of a nuclear power system under different motion conditions, in particular to a shell-and-tube heat exchanger capable of operating under three-dimensional six-degree-of-freedom motion conditions. A numerical model establishment method for calculating the thermal-hydraulic operating characteristics of the heater. Background technique [0002] Nuclear power systems, especially small nuclear power systems, are increasingly being used in various working conditions due to their small size, high energy density, high stability and reliability. In the design process of typical offshore floating nuclear power system stations and miniaturized mobile nuclear power system equipment, the influence of sea wind and waves and the form of transportation on its internal nuclear power system should be fully considered. Secondly, due to natural ...

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Problems solved by technology

However, most of them only consider the influence of ocean conditions on the flow momentum equation, and further research is needed in the coupling calculation of convection and heat transfer. Secondly, there are few studies on the performance of shell-and-tube heat exchangers under ocean conditions.

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