Rectangular-section straight channel warm water discharge lateral diffusion section area calculation method

Abstract

The invention relates to a rectangular-section straight channel warm water discharge lateral diffusion section area calculation method. The method includes the steps of analysis, calculation of temperature rise distribution; obtaining of the largest temperature rise isoline in the vertical direction and the average temperature rise isoline in the vertical direction; obtaining of the temperature rise isoline lateral diffusion largest section area; conduction of nondimensionalization; fitting of a dimensionless characteristic quantity curve, so that a temperature rise isoline largest section relative envelope area formula is obtained. Main parameters of the largest section relative envelope area for influencing the warm water discharge temperature rise isoline lateral diffusion are utilized, according to the principle that the change laws of the largest section relative envelope areas of the breadth depth ration and the coming flow ratio diffusing within a certain range along with characteristic parameters of the coming flow ratio and an environmental flow freund's number are basically the same, through the obtained calculation formula of the straight channel warm water discharge temperature rise isoline largest section relative envelope area, the calculation method of the warm water discharge lateral diffusion largest section area is found, and a practical reference basis is provided for plant site selection and environment influence evaluation on inland nuclear power warm water discharge.

Description

technical field [0001] The invention relates to a calculation method for the cross-sectional area of ​​the lateral diffusion of temperature and drainage in a straight river channel with a rectangular section, which is an environmental hydraulics calculation method and a calculation method for the maximum lateral diffusion area in the river channel suitable for the discharge of inland nuclear power temperature drainage. Background technique [0002] The thermal pollution of warm water discharge from power plants is one of the main environmental problems faced in the process of nuclear power construction. The discharge of hot water from power plants will cause the temperature of local waters to rise, endanger aquatic organisms, and affect the ecological environment. Due to the small water volume, slow water movement, and weak water exchange capacity of the inland plant site, and the dense population and environmental sensitive points around the site, the constraints are more c...

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Problems solved by technology

The method described aims at the research object of the rectangular cross-section along the straight river, establishes a three-dimensional mathematical model suitable for inland plant site waters, studies the mixing and dilution laws of warm drainage in different environmental waters, and solves the temperature rise line for the environmental protection requirements of inland nuclear power plants Calculation of maximum cross-sectional area

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