往复运动
卤水
海水淡化
能量回收
反渗透
材料科学
海水
圆柱
工程类
机械工程
机械
石油工程
能量(信号处理)
膜
热力学
化学
数学
地质学
物理
气体压缩机
海洋学
统计
生物化学
作者
Donghan Geng,Meng Wang
出处
期刊:Desalination
[Elsevier]
日期:2022-10-01
卷期号:540: 115982-115982
被引量:3
标识
DOI:10.1016/j.desal.2022.115982
摘要
Energy recovery devices (ERD) are vital for improving the energy efficiency of reverse osmosis (RO). Nevertheless, small-scale seawater RO systems are rarely equipped with ERDs, mainly because of the associated high capital and maintenance costs. Herein, we propose a new type of reciprocating switcher (RS)-ERD with dual self-boost hydraulic cylinders that can pre-pressurize the low-pressure hydraulic cylinder during stroke switching. The structure and working process of the pre-pressurization reciprocating switcher (PPRS)-ERD are presented, and mathematical models of the entire system are established. Based on these models, a detailed performance analysis is performed. Compared to the conventional RS-ERD, both the high pressure (HP) check valve cores and hydraulic cylinders move smoothly, which suggests that the vibrations of the check valves and cylinders can be neglected. The maximum pressure fluctuation amplitudes of HP seawater (HPS) at the outlet and HP brine (HPB) at the inlet are 0.015 MPa and 0.016 MPa, which represent decreases of 98.91 % and 98.87 %, respectively. The flow fluctuation amplitudes of HPS and HPB do not exceed 0.17 m3/h and 0.07 m3/h, which represent improvements of 95.34 % and 96.59 %, respectively.
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