温排水对水环境影响的数值模拟

Numerical study of the cooling water impact on water environment

以华电湛江煤电项目为背景,建立基于水动力及对流-扩散方程的二维潮流及温度扩散数学模型,模拟了电厂温排水扩散的范围,统计了取水口附近的温升,分析了温排水对周边水环境的影响,为排水口平面布局优化提供了参考。结果表明:取排水工程的实施,对周边保护区及水环境不会产生明显的热影响;1.0℃温升线在西侧将超出安铺港工业与城镇用海边界,顺岸超出距离在1.6 km左右;取水口最大温升基本出现在低潮位时刻,最大温升约1.87℃。

Taking Zhanjiang power plant project as background,based on the hydrodynamics and advection diffusion equation,a 2-D numerical model for tidal current and temperature diffusion was set up,using the model to simulate the temperature diffusion range caused by the cooling water discharged after the project,made statistics on the temperature rise of the intake,then analyzed the influence on the water environment nearby.Results show the construction of the intake-outlet project will not have obvious thermal effects on the surrounding protected areas;temperature rise more than 1.0℃ in the west will diffuse beyond Anpu port industrial border,longshore beyond distance is about 1.6 km;the maximum temperature rise of the intake always occur at the low water level,and the maximum temperature rise is about 1.87 ℃.