使用日志平均温度差 (LMTD) 和 ε-NTU 方法分析直接接触膜蒸中的热量和质量转移
Mohammed A Almeshaal1, Karim Choubani1,2
1Department of Mechanical Engineering, College of Engineering, Imam Mohammad Ibn Saud Islamic University, Riyadh 11432, Saudi Arabia.
Membranes
|June 27, 2023
概括
直接接触膜蒸 (DCMD) 的新数学模型准确地预测了透流量. 该模型基于热交换器原理,显示流量随着温度差异和传递单位的变化而显著增加.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 分离过程 分离过程.
- 膜技术 膜技术 膜技术
背景情况:
- 直接接触膜蒸 (DCMD) 涉及通过多孔膜同时传递热量和质量.
- 精确的DCMD建模需要了解质量传输,表面效应,透流和膜选择性.
研究的目的:
- 为DCMD过程开发一个预测性的数学模型.
- 用换热器类比分析水透流量.
主要方法:
- 开发了DCMD的预测数学模型,使用反流换热器类比.
- 应用日志平均温度差 (LMTD) 和有效性-NTU方法来分析透流量.
- 导出类似于热交换器系统的等式.
主要成果:
- 透流量增加了约220%,日志平均温度差异增加了80%.
- 透流量增加,转移单位数量增加了3%.
- 理论模型与各种料温度的实验数据有很好的一致性.
结论:
- 开发的数学模型准确地预测了DCMD中的透流.
- 换热器类比为DCMD过程建模提供了一个强大的框架.
- 该模型与实验数据的验证支持其对DCMD应用的预测能力.
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