Wave-driven desalination systems are proposed water treatment systems that involve reverse osmosis of seawater powered directly by wave motion. Such a configuration would result in drastic feed pressure fluctuations. For a technology conventionally operated with a constant feed condition, the effect of these variable pressures on membrane integrity and performance is unknown. Experiments were conducted with spiral wound membranes coupled to a system capable of producing feed pressure fluctuations of more than 400 psi. Feed composition included 5, 20, and 35 g/L NaCl, and a synthetic seawater at normal and 1.5× concentration. The variable feed conditions included sine-like pressure waves swings of 200–500 and 500–900 psi with frequencies of 1.25, 7.5, and 12 waves/min, and a model-generated random waveform. Between each wave experiment we performed membrane integrity tests at 650 psi and 25 g/L NaCl feed, which showed a 7.4% drop in the membrane's water permeability coefficient, an 18.4% flux decline, and more than 99% salt rejection over 1770 h of cumulative experimental time. Analysis of permeate samples showed high salt rejection. In general, variable feed pressure had no significant deleterious effect on membrane integrity or performance.

波浪驱动的海水淡化系统是一种水处理系统，涉及直接由波浪运动驱动的海水反渗透。这样的配置将导致剧烈的进料压力波动。对于传统上以恒定进料条件操作的技术，这些可变压力对膜完整性和性能的影响是未知的。使用与能够产生超过 400 psi 进料压力波动的系统耦合的螺旋缠绕膜进行实验。饲料组成包括 5、20 和 35 g/L NaCl，以及正常浓度和 1.5 倍浓度的合成海水。可变进料条件包括 200-500 和 500-900 psi 的正弦压力波摆动，频率为 1.25、7.5 和 12 波/分钟，以及模型生成的随机波形。在每个波浪实验之间，我们在 650 psi 和 25 g/L NaCl 进料下进行了膜完整性测试，结果表明膜的透水系数下降了 7.4%，通量下降了 18.4%，并且在 1770 小时内脱盐率超过 99%。累积实验时间。对渗透样品的分析显示出高脱盐率。一般来说，可变进料压力对膜的完整性或性能没有显着的有害影响。