Mixing characteristics of three-cylinder valve-controlled energy recovery device based on liquid piston

作     者：Zheng Sun Zean Chen Weian Li Yue Wang Jing Yang Zheng Sun;Zean Chen;Weian Li;Yue Wang;Jing Yang

作者机构：School of Resources&Chemical EngineeringSanming UniversitySanming 365004China Chemical Engineering Research CenterSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China State Key Laboratory of Chemical EngineeringTianjin 300072China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第74卷第10期

页      面：83-91页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by the Natural Science Foundation of Fujian Province(2023J011020) the Education Department of Fujian Province/Sanming University(JAT220348/B202202) Sanming University(22YG12,PYT2202) 

主　　题：Desalination Energy Recovery Mixing Liquid piston 

摘      要：The isobaric energy recovery device can significantly reduce the energy consumption of the seawater reverse osmosis system by recycling the residual pressure energy of high-pressure concentrated ***-cylinder valve-controlled energy recovery device(TC-ERD)solves the fluid pulsation of traditional two-cylinder devices,but the use of a“liquid pistonexacerbates the mixing between brine and ***,the evolutionary law of“liquid pistonand the relationship between volumetric mixing degree and operating conditions are *** results show that the“liquid pistonfirst axially expands and then gradually stabilizes,isolating the brine and ***,as long as the volume utilization ratio(U_(R))of the pressure exchange cylinder remains constant,there will not be much difference in the volumetric mixing degree after stabilization of the“liquid piston(Vm-max)regardless of changes in the processing capacity(Q)and cycle time(T_(0)).Therefore,the equation for Vm-max with respect to the operating parameters(Q,T_(0))is derived,which can not only predict the Vm-max of the TCERD,but also provide an empirical reference for the design of other valve-controlled devices with“liquid piston.When the Vm-max is 6%,the efficiency of the TC-ERD at design conditions(30 m^(3)·h^(-1),5.0 MPa)is 97.53%.