This paper presents a new transport model for reverse osmosis (RO) systems, which combines irreversible thermodynamics, together with solution-diffusion theory. The simplifications adopted by the classical theory for solution-diffusion mechanisms have been found to be quite lacking when it comes to predicting the separation of multicomponent mixtures. The presented model accounts for multicomponent computations through the application of thermodynamic property models, as a means to predict the various interactions amongst the species that are present in solution. The developed transport model is relatively easy to implement, and can be utilized alongside existing equipment and thermodynamic property models. The applicability of the model presented in this paper has been tested on three different case studies, including a case that investigates single component behavior and a case that investigates multicomponent behavior The proposed model shows very good agreement with experimental results.

本文提出了一种新的反渗透（RO）系统的输运模型，该模型结合了不可逆的热力学以及溶液扩散理论。当预测多组分混合物的分离时，已经发现经典理论对溶液扩散机理的简化还很缺乏。所提出的模型通过热力学模型应用说明了多组分计算，作为预测溶液中存在的物种之间各种相互作用的一种手段。所开发的运输模型相对易于实施，并且可以与现有设备和热力学特性模型一起使用。本文提出的模型的适用性已在三个不同的案例研究中进行了测试，。