LNG接收站冷排水运动三维数值模拟研究

3D Numerical Simulation Research on Cold Water Drainage Discharge from LNG Terminal

LNG接收站在运行过程中将排放冷排水到环境水体中,因而会对附近海域温度场和海域生物环境产生影响。为了掌握冷排水在环境水体中的扩散规律以及对取水温降的影响,依托深圳LNG项目,建立了冷排水三维水动力水温数学模型。将表层、中层和底层的计算水温与实测水温进行了验证,证实了所建立三维水动力水温模型的可靠性。在此基础上计算得到了夏季大潮和小潮条件下的深圳LNG冷排水温降包络线,最后分析了多排放源对取水温降的叠加效应。

LNG terminal will release cold drainagewater into the environmental water and will affect the offshore temperatures and marine biological environments. To grasp the diffusion law of the cold water and the impacts on the intake temperature drop, MIKE3 software is applied to build a three - dimensional hydrodynamic - temperature mathematical model for cold water drainage, based on SHENZHEN LNG project. Th modelling resuts of surface, middle and bottom water temperatures are validated against measurement data, which indicates the reliability of the above 3D model. On the basis, the enveloping lines of the temperature drop, under the conditions of the spring tides and the neap tides in summer, are calculated out. Then, the cumulative effects of more sources on water tem- perature drop are analyzed.