Experimental investigation of a reverse osmosis desalination system directly powered by wave energy
Experimental investigation of a reverse osmosis desalination system directly powered by wave energy
复制标题
DOI：
10.1016/j.apenergy.2023.121194
复制
发表时间：
2023-08
期刊：
影响因子：
11.2
通讯作者：
J. Mi;Xian Wu;J. Capper;Xiaofan Li;A. Shalaby;Ruoyu Wang;Shihong Lin;Muhammad R. Hajj;L. Zuo
中科院分区：
文献类型：
--
作者：
J. Mi;Xian Wu;J. Capper;Xiaofan Li;A. Shalaby;Ruoyu Wang;Shihong Lin;Muhammad R. Hajj;L. Zuo
用可再生能源为海水淡化过程提供动力是解决全球水资源短缺问题的一个有前途的解决方案，同时碳足迹和环境影响最小。我们实验研究了一种可持续的反渗透（RO）海水淡化系统直接由波浪能供电。在该系统中，海水被加压并通过由振荡浪涌波能量转换器（OSWEC）直接驱动的活塞泵泵送到RO脱盐模块。在进油口处采用蓄能器，以减小时变海洋条件下的压力波动。同时，盐水出口上的针形阀用于调节系统压力和水回收。设计、制作了一个1：10的比例模型，并根据弗劳德比例定律在波浪水槽中进行了试验。在3.5 g/L进料盐度的水槽试验中获得的最佳比水生产率（SWP）为2.23 m3/kWh，表明对于35 g/L海水盐度，全尺寸比水生产率为0.22 m3/kWh。实验研究和分析了针阀调节对单位产水量的影响。在特定的操作条件下，调整该阀门可将比水生产率提高约17%，并将系统压力降低24%，从而避免极端压力并提高系统的能力。这项试点研究表明，海浪能是一种有前途的能源，可持续地为反渗透海水淡化提供动力，并为沿海地区提供淡水。
Powering desalination processes with renewable energy is a promising solution to address the global issue of water shortage with minimum carbon footprint and environmental impact. We experimentally investigate a sustainable reverse osmosis (RO) desalination system directly powered by wave energy. In this system, seawater is pressurized and pumped to a RO desalination module via a piston pump directly driven by an oscillating surge wave energy converter (OSWEC). An accumulator is adopted on the feed inlet to mitigate the pressure fluctuations under time-varying ocean conditions. Meanwhile, a needle valve on the brine outlet is used to adjust the system pressure and water recovery. A 1:10 scaled model was designed, fabricated, and tested in a wave tank based on the Froude scaling law. The optimal specific water productivity (SWP) obtained in the tank tests with 3.5 g/L feed salinity was 2.23 m3/kWh, indicating a full-scale specific water productivity of 0.22 m3/kWh for 35 g/L seawater salinity. The influence of needle valve tuning on the specific water productivity was experimentally investigated and analyzed. Under a specific operational condition, tuning this valve improved specific water productivity by about 17 % and reduced the system pressure by 24 %, thereby avoiding extreme pressure and improving the system’s capability. This pilot study demonstrates that ocean wave energy is a promising source to sustainably power reverse osmosis desalination and provide freshwater water for coastal regions.