The modeling equations for predicting distillate flux in the direct contact membrane distillation (DCMD) module with embedded spiral wire of various spiral wire pitches in concentric circular module were developed theoretically and verified experimentally. The temperature distributions, distillate flux and energy consumption of both concurrent- and countercurrent-flow operations were presented with the volumetric flow rate, inlet saline temperature, the spiral wire as parameters, and the experimental data was incorporated into the modeling equations to validate the theoretical predictions. A description of the average Nusselt number was made to evolve a correlating equation of heat transfer coefficients incorporating distillate flux and Reynolds numbers with the use of experimental data. The effects of operating and design parameters such as flow rate, inlet saline temperature and spiral wire pitch on the pure water productivity and power consumption under both concurrent- and countercurrent-flow operations were also analyzed.

理论上建立了模型预测方程，并建立了预测方程，该模型方程预测了同心圆模块中具有各种螺旋线节距的嵌入式螺旋线的直接接触膜蒸馏（DCMD）模块中的馏分通量。以体积流量，进盐水的温度，螺旋线为参数，给出了并流和逆流两种操作的温度分布，馏分通量和能耗，并将实验数据纳入了建模方程中以验证理论的正确性。预测。通过使用实验数据，对平均努塞尔数进行了描述，以发展出结合了馏分通量和雷诺数的传热系数的相关方程。