铁山湾内电厂温排水累积热影响数值模拟  

Numerical simulation of accumulated effect of thermal discharge from power plants in Tieshan Bay

作　　者：赵懿珺[1] 王靖宇[2] 陈小莉[1] 

机构地区：[1]中国水利水电科学研究院水力学研究所,北京100038 [2]清华大学水利水电工程系,北京100084

出　　处：《水利水电科技进展》2015年第2期47-51,共5页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(51309257);中国水利水电科学研究院科研专项(水集1126)

摘　　要：为了解铁山湾内已有电厂与新建电厂温排水的叠加累积效应,采用Delft3D水动力模型进行潮流及温度场的数值模拟。通过对模型主要时空参数进行敏感性分析,确定了模拟计算时长为25个潮周期,最小网格尺寸为40 m,时间步长为15 s。流场及温度场计算结果表明:新建电厂投运后,岸线变化导致工程局部区域流场发生改变;1℃温升线与北海电厂重叠,影响范围较北海电厂单独运行增加21 km2;北海电厂取水温升增幅不超过0.4℃。数学模型计算结果与同步开展的物理模型试验结果对比表明,排水口近区两者差异较大,随着温排水远离排水口,两者差异逐渐减小,在1℃温升线附近两者基本相同。To research the accumulated impact of thermal discharge from established and proposed power plants in Tieshan Bay,Delft three dimensional（ Delft3D） hydrodynamic model was adopted to simulate the tidal current and temperature field. Based on sensitivity analysis of key spatial and temporal parameters,the computation time is twenty five tidal periods,the minimal mesh size is 40 meters,and the time step is 15 seconds. The numerical results showed： local current fields in the vicinity of new projects were changed due to the shoreline variation when proposed power plant is in operation;the 1 centigrade（ 1℃） isothermal-increment line overlapped with Beihai Power Plant; the impact area was increased by 21 square kilometers; the intake water temperature of Beihai Power Plant rose 0. 4℃. Comparison between numerical model and physical model revealed that the simulation results have bigger differences in the near field,but as the thermal discharges move far away from water outlet the differences become smaller and the two models have almost the same impact area near 1℃ isothermal-increment line.

关 键 词：铁山湾 电厂温排水 累积热影响 参数敏感性 Delft3D水动力模型 

分 类 号：X82[环境科学与工程—环境工程] X55