长江水域电厂温排水数值模拟

对电厂环境水域温排水进行预测有助于合理地布置电厂取排水工程,使电厂取到低温水,使废热在水环境中得到充分的消散。针对常熟电厂附近水域水流和污染物的对流扩散特点,采用Delft-3D软件平面二维水流温度场数学模型对电厂温排水进行数值模拟,在水位和流速测点验证的基础上,考察温度场的分布情况。分析结果显示:冬季小潮条件比冬季大潮条件下的温升影响面积更大,且向下游和离岸方向扩散的距离更远;两种条件下取水口处的温升均较小。

Numerical Simulation on Thermal Discharge of Yangtze River Power Plant

Prediction of the thermal discharge of water environment of a power plant can reasonably arrange the water intake and drainage project of the power plant, which can help the power plant obtain the low-temperature water and fully dissipate the waste heat into the water environment. In this study, a power plant in Changshu City was chosen. According to the convection-diffusion characteristics of flow and contaminants in the water environment of the power plant, the 2-D flow mathematical model in the Delft-3D software was used to simulate the thermal discharge of the power plant. On the basis of the verification of water depths and flow velocities, the distribution of temperature field was evaluated. The results showed that the affected area of temperature rise and the diffusion distance to downstream and offshore are larger under neap tide conditions than that under spring tide conditions, while the temperature rise at the water intake area is small under the two tide conditions.