Computational Fluid Dynamics Investigation on Indirect Contact Freeze Desalination
Computational Fluid Dynamics Investigation on Indirect Contact Freeze Desalination
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DOI：
10.1016/j.desal.2017.06.023
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发表时间：
2017-10
期刊：
影响因子：
9.9
通讯作者：
H. Jayakody;R. AL-Dadah;S. Mahmoud
中科院分区：
文献类型：
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作者：
H. Jayakody;R. AL-Dadah;S. Mahmoud
随着全球对淡水需求的增加，海水淡化被认为是解决饮用水短缺的潜在解决方案。冷冻脱盐具有能耗低的优点，因为熔化潜热约为蒸发潜热的七分之一。CFD是一种强大的技术，可以有效地分析和研究热力学过程。使用ANSYS Fluent软件开发冷冻脱盐过程的3D CFD模型，使用物质传输、固化/熔化和能量模块。然后，通过在容器中使用浓度为35 g/L的盐水进行实验来验证该CFD模型。使用Peltier装置在容器底部施加260 K的冷冻温度30分钟。从实验工作中测得的冰盐度和从CFD模拟预测的冰盐度进行了比较，显示出2.10的百分比偏差。还比较了实验工作和CFD模拟的盐水温度，平均偏差为± 0.495 K。已被用来进行参数分析，以预测冻结温度，溶液盐度和冻结的方向的影响，对冻结时间，冰的产量和它的盐度。
With the global increasing demand for fresh water, desalination of sea water is regarded as a potential solution to provide for potable water shortages. Freeze desalination offers the advantage of lower energy consumption, since the latent heat of fusion is approximately one-seventh that of the latent heat of vaporisation. CFD is a powerful technique that enables the effective analysis and investigation of thermodynamic processes. ANSYS Fluent software was used to develop a 3D CFD model of the freeze desalination process using species transport, solidification/melting and energy modules. This CFD model was then validated by conducting experiments using salt water of 35 g/L concentration in a container. A freezing temperature of 260 K was applied at the container base using a Peltier device for 30 min. The measured ice salinities from the experimental work and those predicted from CFD simulations were compared showing a percentage deviation of 2.10. The salt water temperatures were also compared from the experimental work and CFD simulations, giving an average deviation of ± 0.495 K. The developed CFD model has been used to carry out parametric analysis to predict the effects of freezing temperature, solution salinity and the direction of freezing; on the freezing time, ice production and its salinity.