开发一个CFD模型,表明反应堆尺寸,床流不均和VOCs生物过器性能之间的定量关系
Ziyu Liu1, Dong Dong2, Jinying Xi1
1Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing, P.R. China.
Journal of the Air & Waste Management Association (1995)
|October 6, 2023
概括
这项研究开发了生物过器的计算流体动力学 (CFD) 模型,揭示了床流不均 (BFU) 如何影响挥发性有机化合物 (VOC) 清除. 优化反应堆尺寸可以提高VOC去除效率.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 流体动力学 流体动力学
背景情况:
- 生物过是去除挥发性有机化合物 (VOC) 的关键技术.
- 了解气流分布和床流不均 (BFU) 对于优化生物过器性能至关重要.
- 现有的模型往往缺乏对反应堆设计和BFU之间的定量关系的详细调查.
研究的目的:
- 开发和验证基于计算流体动力学 (CFD) 的生物过模型.
- 研究床流不均 (BFU) 对挥发性有机化合物 (VOC) 清除效率的影响.
- 为了建立反应堆尺寸 (宽度与高度比,空床停留时间 - EBRT),BFU和生物过器性能之间的定量关系.
主要方法:
- 使用CFD开发一个合气体流和VOC去除子模型.
- 对差价合约模型与试点规模实验数据的验证.
- 参数模拟分析反应堆几何和EBRT对流量分布和VOC去除的影响.
主要成果:
- 发现流量不均度指数 (FUI) 与反应堆尺寸有显著差异.
- 在恒定的EBRT下增加宽度与高度的比率导致更高的FUI,降低了VOC去除效率 (约. 10%),并且VOC度分布不均.
- 在恒定宽高比率下增加EBRT也增加了FUI,降低了VOC去除效率.
- 在0.5的宽高比下观察到最佳性能,低FUI甚至VOC度降低.
结论:
- 经过验证的CFD模型为分析VOC生物过提供了一个强大的工具.
- 反应堆尺寸显著影响BFU,这直接影响了VOC去除效率.
- 研究结果为设计更高效的生物过器提供了定量见解,在实际应用中增强了VOC去除.
相关概念视频
01:30Typical Model Studies
367
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
367
01:24Rapidly Varying Flow
81
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
81
01:13Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model
72
Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
72