潮汐控制下的河湾地区温排水运动和扩散规律研究

Research on movement and diffusion regularities of cooling water from power plant at estuary area under control of tide

该文采用原型资料分析、数值模拟和物理模型试验相结合的技术路线,针对潮汐动力控制下的河湾地区电站温排水运动特性和取排水工程效果进行研究。二维数学模型用于温排水对远区水域及敏感目标的影响研究,并为近区数模和物模提供水动力要素。基于水动力参数验证试验,在不同水文条件和电厂运行工况下,分析工程附近水域水动力特性。着重探讨了不同取、排水口方案布置条件下的温排水运动和扩散规律,预测受纳水域温升面积和取水温升,论证取排水口设计方案的合理性并提出优化方案。研究结果表明,所采用技术方案的模拟精度可满足取排水口工程布局优化和热污染环境影响评价的要求。

A technical line combined with measured data analysis, physical model testing and numerical simulation is utilized to explore the movement characteristics and engineering action of cooling water under control of tide at esturary area. A two-dimensional mathematical model is developed for the research on far-zone water quality impact of sensitive target by the thermal discharge diffusion. Moreover, numerical simulation results can provide hydrodynamic factors for near-zone mathematical and physical model testing. Based on hydrodynamic parameters validation process under different hydrological and operating conditions, hydrodynamic specialities are studied in the water area nearby the power station. Considering different design projects for intake and outlet of cooling water circulation, the migration and diffusion regularities of warm discharge water are explored with emphasis. Rised temperature of intaked water and corresponding water area are predicted by forecasting simulation and testing, The rationality of designed project for warm water intake and discharge system has been demonstrated and optimized solutions are purposed after detailed experiments and mathematical analyses. Research results show simulation accuracy of the technical line applied in this paper can statisfy the requirement of engineering design optimization and enviroment effect appraisal.