Abstract: The control model for dynamic startup process of the vertical tube evaporator(VTE)-multi-effect distillation(MED) seawater desalination system was established by using a developed code based on the non-linear differential equations for system design and performance analysis.Theoretical investigation of the startup characteristics was conducted with the numerical method.The influence of the operating parameters, such as initial feed brine flow rate and top brine temperature,on the startup process was analyzed. The coupling effect of feed brine flow rate, GOR and startup time were also investigated as the evidence to determine optimal initial feed brine flow rate. The results also indicated that the system could consume the total rated heat generated by the low temperature nuclear heating reactor （LT-NHR）even at the most initial startup stage, implying that the present desalination system demonstrated excellent coupling characteristics with the LT-NHR. With necessary experimental verification, the startup control model developed in this paper could be the theoretical basis for the analysis of dynamic performances of seawater desalination system.

摘要： 建立大型竖管多效蒸发海水淡化系统的动态启动控制模型，通过数值分析研究，对系统的启动过程和启动特性进行理论探索.分析了初始原料海水流量以及最高饱和温度等运行参数的选择对系统启动过程的影响.研究了启动阶段，原料海水流量与系统的造水比以及启动时间之间的耦合影响;计算结果为原料海水流量的优化提供了依据.研究还表明，在启动之初，系统即可稳定地承担作为热源的低温核供热堆的额定产热量，显示该系统和核供热堆具有良好的耦合特性.建立的启动模型在经过实验验证加以完善之后，可以作为分析系统动态运行特性的理论基础.