School of Mechanical Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran.
Sci Rep. 2020 Oct 8;10(1):16790. doi: 10.1038/s41598-020-73964-7.
At the present study, a one-dimensional model for the flat sheet direct contact membrane distillation (DCMD) for desalination purposes is proposed. Flows and membrane properties have been estimated by appropriate temperature-dependent correlations. Results show that the numerical model is in a very good agreement with experimental data at various feed temperatures, flow rates and concentrations. A constructal design is investigated for DCMD to assess how constructal law can improve the DCMD performance. With the same thermal efficiency of 93.5%, constructal design improves the water mass flux by 37.5% in comparison with the conventional DCMD design. Also, an evolutionary-based optimization algorithm is employed to increase the efficiency of the constructal and conventional design. The Pareto frontier of the constructal and conventional design is compared with each other and the correlations between design variables are investigated. Overall, the present study demonstrates how constructal law can increase the performance of energy systems with a simple modification.
在本研究中，提出了一种用于海水淡化的平板直接接触膜蒸馏（DCMD）的一维模型。通过适当的温度相关相关性来估算流动和膜特性。结果表明，数值模型在各种进料温度，流速和浓度下与实验数据非常吻合。为了评估构形定律如何提高 DCMD 的性能，对 DCMD 进行了构形设计研究。在相同的热效率 93.5％的情况下，与传统的 DCMD 设计相比，构形设计将水质量通量提高了 37.5％。此外，还采用基于进化的优化算法来提高构形和常规设计的效率。比较了构形和常规设计的 Pareto 前沿，并研究了设计变量之间的相关性。总体而言，本研究表明，通过简单的修改，构形定律如何提高能源系统的性能。
