Numerical and experimental research on the heat transfer of seawater desalination with liquid film outside elliptical tube
Numerical and experimental research on the heat transfer of seawater desalination with liquid film outside elliptical tube
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DOI：
10.1016/j.ijheatmasstransfer.2015.09.043
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发表时间：
2016-02
影响因子：
5.2
通讯作者：
C. Qi;Houjun Feng;Hong-qing Lv;C. Miao
中科院分区：
文献类型：
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作者：
C. Qi;Houjun Feng;Hong-qing Lv;C. Miao
采用理论分析、CFD数值模拟和实验相结合的方法，对椭圆管外降膜蒸发进行了研究，并与圆管外降膜蒸发进行了对比，为海水淡化系统的设计和改进提供了依据。实验表明，模拟得到的椭圆率E = 1.5的椭圆管外液膜厚度与实验值吻合较好，最大偏差在8%以内。这充分说明了数值模型的正确性和模拟计算的可行性。实验结果还表明，当E = 1.5时，椭圆管的传热系数比圆管提高20-22%。本研究证明了椭圆管应用于水平管降膜蒸发和海水淡化的优越性和可行性。为促进椭圆管降膜蒸发在海水淡化系统中的设计和应用进行了探索性研究。
The falling film evaporation outside the elliptical tube was studied and compared with the circular tube for the design and improvement of seawater desalination system using the method of theoretical analysis, CFD numerical simulation and experiments. The experiment shows that the thickness of liquid film outside elliptical tube ofE(ellipticity) = 1.5 obtained from the simulation agrees well with the experimental data and the maximum deviation is within 8%. This fully illustrates that the numerical model is correct and that analog calculation is feasible. The experimental results also manifested that heat transfer coefficient of the system withE= 1.5 elliptical tubes increases by 20–22% compared with circular tubes. This study testified that it is superiority and feasibility that elliptical tubes were applied to falling-film evaporation and seawater desalination of horizontal tubes. The exploratory researches will be conducted for promoting the design and application of falling film evaporation with elliptical tubes in the seawater desalination system.