In conventional hollow fiber reverse osmosis (HF RO) modules, the lumen side has one end sealed in an epoxy resin, and the other end opened (1way RO) for permeate collection. This study investigates the effect of having both ends open (2way RO) in the HF modules. The RO experiments were conducted using de-ionized (DI) water in two ends opened HF module. The 2way RO experiments produced 10 % more permeate flow rate than 1way RO at the same average shell side pressure. This can be attributed to the building of pressure at the closed end lumen side which reached up to 1.7 bar at 1.09 L/min permeate flow rate. Further, the axial flow HF RO model was improvised to simulate the 2way RO operations. The Hagen-Poiseuille and Ergun equations were also modified to predict the pressure drop with better accuracy. Reduction in the HF inner diameter and increase in the friction factor at the lumen wall were considered to modify the Hagen-Poiseuille equation. The models based on the above factors deviated by 2 and 10 %, respectively in predicting the closed-end pressure while the generic form of Hagen-Poiseuille deviated by 67 %.

在常规的中空纤维反渗透（HF RO）模块中，管腔一侧的一端密封在环氧树脂中，另一端敞开（单向RO）以收集渗透液。这项研究调查了在HF模块中两端都开路（2way RO）的影响。RO实验是在两端打开的HF模块中使用去离子（DI）水进行的。在相同的平均壳侧压力下，2way RO实验产生的渗透物流量比1way RO多出10％。这可以归因于在封闭端管腔侧的压力的建立，其在渗透流量1.09 L / min时达到了1.7 bar。此外，改进了轴向流HF RO模型来模拟2way RO操作。还修改了Hagen-Poiseuille和Ergun方程，以更好地预测压降。人们认为减小HF内径和增加内腔壁处的摩擦系数可以修改Hagen-Poiseuille方程。在预测封闭端压力时，基于上述因素的模型分别偏离了2％和10％，而Hagen-Poiseuille的通用形式偏离了67％。