Direct contact membrane distillation: A sensitivity analysis and an outlook on membrane effective thermal conductivity
Direct contact membrane distillation: A sensitivity analysis and an outlook on membrane effective thermal conductivity
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DOI：
10.1016/j.memsci.2020.119035
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发表时间：
2021-02-04
影响因子：
9.5
通讯作者：
Pourkashanian, M.
中科院分区：
文献类型：
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作者：
Ismail, M. S.;Mohamed, A. M.;Pourkashanian, M.
建立了一个严格的、高保真的直接接触膜蒸馏(DCMD)组件的二维数值模型。所开发的模型包含了控制膜蒸馏(MD)组件内发生的传输现象的所有关键物理。捕捉到了流道和膜中流体的物理性质随温度的空间变化。利用该模型考察了关键性能指标(即跨膜通量、热效率和温度极化系数)对10种关键操作条件和膜特性的敏感性。讨论了用于估算膜的有效导热系数的模型，表明需要更合适的模型来准确地估计膜的有效导热系数，并为此提出了一个新的模型。
A rigorous and high-fidelity two-dimensional numerical model for a direct contact membrane distillation (DCMD) module has been developed. The developed model incorporates all the key physics governing the transport phenomena taking place within the membrane distillation (MD) module. The spatial variation of the physical properties of the fluids flowing in the channels and the membrane with temperature has been captured. The model has been used to investigate the sensitivity of the key performance indicators or KPIs (i.e. the transmembrane flux, the thermal efficiency and the temperature polarisation coefficient) to ten key operational conditions and membrane characteristics. The models used to estimate the effective thermal conductivity of the membranes have been discussed and it was shown that more appropriate models are required to accurately estimate the latter parameter and, to this end, a new model has been proposed.