Dynamic model of saturator based on a global heat and mass transfer coefficient

一种基于通用传热传质系统的新型饱和器的动态建模方法（英文）

Saturator is one of the core components of humid air turbine （HAT） and is the main feature of HAT making it different from other gas turbine cycles. Due to the lack of sufficient experience in commercial plant operation, HAT cycle has a great demand for modeling and simulation of the system and its components, especially the saturator, to provide reference for system design and optimization. The conventional saturator models are usually based on the theory of heat and mass transfer, which need two accurate coefficients to ensure convincing results. This work proposes a global heat and mass transfer coefficient based on cooling tower technology to model the saturator in small-scale HAT cycle. Compared with the experimental data, the simulation results show that the proposed model well predicts the dynamic humidity and temperature distribution characteristics of saturator at low air pressure and temperature.

饱和器是湿空气透平(HAT)循环最重要的部件之一,也是HAT循环与其他燃气轮机循环最重要的区别。由于缺少相关商业运行的经验,热力系统建模与仿真,特别是对饱和器的建模、仿真工作,对HAT循环系统设计、优化有着至关重要的意义。传统饱和器模型通常是基于传热传质理论,该理论需要精确的传热系数和传质系数来保证模型的准确性。本文提出了一种利用基于冷却塔模型的通用传热传质系数来描述小型HAT循环系统中饱和器的建模方法。通过与仿真结果的比较表明,该模型可以很好地预测饱和器在低压低温条件下的内部湿度和温度的动态分布特性。