扩散系数对温排水海域使用面积的敏感度分析

Sensitivity Analysis of Temperature Diffusion Coefficient in Warm Water Drainage Area

海洋部门对沿海火(核)电站温排水海域使用面积的审批根据数学模型或物理模型确定的温升4℃的最大包络面积来确定。对特定的瞬时点源的二维扩散情况和连续点源的二维扩散情况理论解进行了探讨,并将水质模块RMA4模型在实际海区中进行了运用。结果表明:温度扩散系数E是循环冷却水温排放数值模拟的一个重要参数,不同扩散系数产生不同的海域使用面积。因此,在温排水的数值模拟中应增加参数敏感度分析,并采用实测资料率定和验证。

When planning to build a power plant, marine managing departments usually decide the sea-using area by the 4℃ temperature rise determined by the numerical or physical model. Simu- lations of the temperature diffusion and dissipation are without calibration and verification because of some reasons. It is educed that the temperature diffusion coefficient E is an important parame- ter when simulating the movement of cooling water of a power plant based on actual application of the RMA4 model and the analytical solution of the specific instantaneous point source and contin- uous point source of warm water drainage. Therefore, it is necessary to add parameter sensitivity analysis and calibration in the numerical simulation.