A desalination system with efficiency approaching the theoretical limits
A desalination system with efficiency approaching the theoretical limits
复制标题
效率接近理论极限的海水淡化系统
DOI：
10.1080/19443994.2016.1180482
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发表时间：
2016
影响因子：
1.1
通讯作者：
J. Orfi
中科院分区：
文献类型：
--
作者：
P. Davies;J. Wayman;Chioma Alatta;K. Nguyen;J. Orfi
该项目的目标是设计一种新的海水淡化系统，即使在高回收率的情况下，能源效率也接近理论热力学极限。该系统使用反渗透(RO)和间歇操作原理来克服浓缩系数问题，从而防止连续流反渗透系统达到这一极限，从而实现可能的最低比能耗SEC。间歇操作包括三个阶段的循环：加压、吹扫和再灌装。能量回收是设计所固有的。与闭路海水淡化不同的是，在加压阶段不会向压力回路添加给水。将间歇配置与标准配置进行了比较，如连续单级反渗透(具有能量回收)和电荷耦合器件。理论分析表明，在回收率为80%的情况下，新系统能比电荷耦合器件节省33%的能量。已经使用现成的部件建造了一个原型，并在给水盐度和回收率分别为2,000-5,000ppm和17.2-70.6%的情况下进行了测试。结果与标准配置相比非常好。例如，当给水中含有5,000千瓦时的氯化钠，回收率为69%时，水力SEC为0.31千瓦时/立方米-好于带有能量回收装置的单级连续流动系统在理论上可能达到的最低值。
The objective of this project is to design a new desalination system with energy efficiency approaching the theoretical thermodynamic limit—even at high recovery ratio. The system uses reverse osmosis (RO) and a batch principle of operation to overcome the problem of concentration factor which prevents continuous-flow RO systems from ever reaching this limit and thus achieving the minimum possible specific energy consumption, SEC. Batch operation comprises a cycle in three phases: pressurisation, purge, and refill. Energy recovery is inherent to the design. Unlike in closed-circuit desalination (CCD), no feedwater is added to the pressure circuit during the pressurisation phase. The batch configuration is compared to standard configurations such as continuous single-stage RO (with energy recovery) and CCD. Theoretical analysis has shown that the new system is able to use 33% less energy than CCD at a recovery ratio of 80%. A prototype has been constructed using readily available parts and tested with feedwater salinities and recovery ratios ranging from 2,000 to 5,000 ppm and 17.2–70.6%, respectively. Results compare very well against the standard configurations. For example, with feedwater containing 5,000 ppm NaCl and recovery ratio of 69%, a hydraulic SEC of 0.31 kWh/m3 was obtained—better than the minimum theoretically possible with a single-stage continuous flow system with energy recovery device.
太阳能光伏发电机驱动的一体化反渗透温室系统的开发
影响因子：
1.1
作者：
Davies P
通讯作者：
Davies P