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首页> 美国卫生研究院文献>Membranes >Exergy Analysis of a Direct Contact Membrane Distillation (DCMD) System Based on Computational Fluid Dynamics (CFD)
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Exergy Analysis of a Direct Contact Membrane Distillation (DCMD) System Based on Computational Fluid Dynamics (CFD)

机译：基于计算流体动力学（CFD）的直接接触膜蒸馏（DCMD）系统的漏洞分析

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Understanding the energy efficiency of direct contact membrane distillation (DCMD) is important for the widespread application and practical implementation of the process. This study analyzed the available energy, known as exergy, in a DCMD system using computational fluid dynamics (CFD). A CFD model was developed to investigate the hydrodynamic and thermal conditions in a DCMD module. After the CFD model was verified, it was used to calculate the temperature polarization coefficient (TPC) and exergy destruction magnitudes under various operating conditions. The results revealed that slight decreases and increases in the TPC occurred with distance from the inlet in the module. The TPC was found to increase as the feed temperature was reduced and the feed and permeate flow rates were increased. The exergy destruction phenomenon was more significant under higher feed temperatures and higher flux conditions. Although the most significant exergy destruction in the permeate occurred near the feed inlet, the effect became less influential closer to the feed outlet. An analysis of exergy flows revealed that the efficiency loss in the permeate side corresponded to 32.9–45.3% of total exergy destruction.
机译：了解直接接触膜蒸馏（DCMD）的能量效率对于广泛的应用和实际实施过程很重要。本研究分析了使用计算流体动力学（CFD）的DCMD系统中称为DRERGY的可用能量。开发了CFD模型以研究DCMD模块中的流体动力学和热条件。在验证CFD模型之后，用于在各种操作条件下计算温度偏振系数（TPC）和漏洞破坏幅度。结果表明，在模块中的入口中的距离发生，TPC的略微降低并增加。发现TPC随着进料温度降低，饲料和渗透流量增加而增加。在较高饲料温度和较高的助焊条件下，漏胀破坏现象更为显着。虽然渗透物中最显着的漏洞破坏发生在进料入口附近，但效果变得更加接近进料出口。渗透流动的分析表明，渗透侧的效率损失相当于总漏洞的32.9-45.3％。

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