【摘要】 在大规模光热电站参与调峰运行的背景下，探究太阳能光热电站熔盐蒸汽发生系统的运行特性和安全性尤为重要。为了分析太阳能光热电站熔盐蒸汽发生系统的运行特性和安全性，采用效能-传热单元数方法建立了某50 MW光热电站熔盐蒸汽发生系统的热预测模型，使用实际运行数据修正了过热器、再热器、蒸发器和预热器的效能-传热单元数经验关联式，预测误差低于2.7%,探究了熔盐流量和换热面积对系统换热性能的影响，并提出了两种控制预热器运行安全的设计方案。结果表明：蒸发器的总换热系数受到熔盐流量的影响最大，可以通过增大熔盐流量提高系统换热量，但提升效果有限，增加过热器和再热器的面积可改善实际运行主蒸汽参数以达到最佳值；同时对蒸发换热系统中预热器安全运行进行了分析，提出了预热器安全运行措施。更多还原

【Abstract】 Against the backdrop of large-scale solar thermal power plants participating in peak regulation operation, it is particularly important to explore the operation characteristics and safety of the molten salt steam generation system in solar thermal power plants. In order to analyze the operation characteristics and safety of the molten salt steam generation system in a solar thermal power plant, the effectiveness-number of transfer units method is adopted to establish a thermal prediction model of the molten salt steam generation system in a 50 MW solar thermal power plant. The empirical correlation equations of the effectiveness-number of transfer units for the superheater, reheater, evaporator and preheater are corrected using the actual operation data, and the prediction error is less than 2.7%. The influence of the molten salt flow rate and the heat transfer area on the heat transfer performance of the system is explored, and two design schemes for controlling the operation safety of the preheater are proposed. The results show that the total heat transfer coefficient of the evaporator is most affected by the molten salt flow rate. The heat transfer amount of the system can be increased by increasing the molten salt flow rate, but the improvement effect is limited. Increasing the areas of the superheater and the reheater can improve the actual operation parameters of the main steam to reach the optimal values. At the same time, the safe operation of the preheater in the evaporative heat transfer system is analyzed, and measures for the safe operation of the preheater are proposed.更多还原