This work concerns analyzing, modeling and validation of the dynamic behavior of a Direct Contact Membrane Distillation (DCMD) pilot-plant. The reaction curve method is used to analyze the dynamic characteristics of the outlet permeate and brine temperatures. The time constant for these two process outputs were extracted from the experimental data and analyzed. A low order and high-order linear models in the form of state-space and transfer functions were developed and used to approximate the dynamic of the permeate and brine temperatures, respectively. It is found that these linear dynamic models cannot fully describe the physical process behavior over wide operating conditions. The global deviation between the measured and simulated transient response of the brine temperature and permeate temperature over the entire operating conditions is found to be 15% and 24%, respectively. Hence, there is a potential to improve the dynamic model effectiveness by incorporating the nonlinearity aspects of the real process.

这项工作涉及直接接触式膜蒸馏（DCMD）中试厂的动态行为的分析，建模和验证。反应曲线法用于分析出口渗透物和盐水温度的动态特性。从实验数据中提取并分析了这两个过程输出的时间常数。建立了状态空间和传递函数形式的低阶和高阶线性模型，分别用于近似渗透液和盐水温度的动态变化。发现这些线性动力学模型不能完全描述宽工作条件下的物理过程行为。发现在整个操作条件下，盐水温度和渗透物温度的实测和模拟瞬态响应之间的全局偏差分别为15％和24％。因此，