摘要
建立了直驱式潮汐能反渗透海水淡化系统的性能计算模型,考察了潮汐泄湖内外形成的水位差对水轮机和高压泵流量、膜元件产水流量和回收率以及系统总效率的影响,分析了水轮机不同额定水头以及高压泵不同出口压力的情况下系统性能的变化规律。结果表明:随着水位差的增大,膜元件产水流量先增大而后减小,回收率先减小而后增大,系统总效率不断下降随后逐渐趋于平缓;增加高压泵输出的进料海水压力,有利于增加膜元件产水流量和回收率以及提高系统总效率;采用较大额定水头的水轮机,有利于增加膜元件产水流量,但会导致回收率下降,且其对系统总效率的影响不明显。
A computational model for performance analysis of the direct-driven tidal energy reverse osmosis seawater desalination system is built in this article. The effect of water heads which are formed by the water levels of inside and outside of the tidal lagoon on the hydraulic turbine flow rate, high-pressure pump flow rate, permeate flow rate and recovery rate of the membrane element,and system total efficiency are theoretically investigated. The system performances under different hydraulic turbine rated head and different high-pressure pump outlet pressure are also studied.The results showed that the permeate flow rate of the membrane element tend to be increase at first and then decrease with the increase of water head, and the recovery rate shows an opposite change against permeate flow rate with the increase of water head, and the system total efficiency is decrease with the increase of water head. It is also found that the permeate flow rate and recovery rate of the membrane element are increase due to a higher pressure seawater which is outputted from the high-pressure pump, and finally the system total efficiency is increase. When a higher rated head of the hydraulic turbine is adopted, the permeate flow rate of the membrane element will increase, but the recovery rate will decrease, and the change of the system total efficiency is very small.
作者
陈明丰
张明宇
凌长明
CHEN Ming-Feng;ZHANG Ming-Yu;LING Chang-Ming(Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China;School of Mechanical and Power Engineering, Guangdong Ocean University, Zhanjiang 524088, China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2019年第6期1211-1218,共8页
Journal of Engineering Thermophysics
基金
广东省科技计划项目(No.2016A010104021,No.2017A010104011)
深圳市科技计划项目(No.JCYJ20170306162116012)
关键词
潮汐能
海水淡化
反渗透
计算模型
tidal energy
seawater desalination
reverse osmosis
computational model
