Effects of aeration on matrix temperature by infrared thermal imager and computational fluid dynamics during sludge bio-drying
文献类型：期刊论文
| 作者 | Wang, Yawei; Wei, Yuansong; Yu, Dawei; Yang, Min; Iq, Lu; Liu, Mengmeng |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 122期号:0页码:317-328 |
| 关键词 | Bio-drying Computational Fluid Dynamics Infrared Thermal Imager Aeration Matrix Temperature Excess Sludge |
| 英文摘要 | The effect of aeration on the pile matrix temperature was investigated using thermocouples and Infrared Thermal Imager (IRI) for temperature sensing, and Computational Fluid Dynamics (CFD) for modelling of temperature variation during aeration in a full-scale sludge biodrying plant. With aeration saving of 20%, the improved strategy speeded up biodrying from 21 days to 14 days, while achieving similar drying effect. A persistent thermocouple recorded the one-dimensional (1D) total temperature variation of all aeration strategies. The IRI captured the rapid two-dimensional (2D) pile temperature dropped from 72.5 degrees C to 30.3 degrees C during 6 min of aeration, which mechanism suggested as the latent heat of moisture evaporation and sensible heat of air exchange. The CFD three-dimensional (3D) CFD results highlight the importance of latent heat rather than sensible heat. Therefore, the pile temperature drop inferred is Delta T = 5.38 degrees C theoretically and Delta T = 5.17 +/- 4.56 degrees C practically, per unit of MC removed. These findings also emphasize the possibility of a pile temperature valley, due to excessive aeration under unsaturated vapour conditions. Surface temperature monitored by IRI coupled with 3D temperature simulated by CFD rapidly gives a clear matrix temperature evolution, empowering biodrying by more accurate temperature and aeration. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39192]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Wang, Yawei,Wei, Yuansong,Yu, Dawei,et al. Effects of aeration on matrix temperature by infrared thermal imager and computational fluid dynamics during sludge bio-drying[J]. WATER RESEARCH,2017,122(0):317-328. |
| APA | Wang, Yawei,Wei, Yuansong,Yu, Dawei,Yang, Min,Iq, Lu,&Liu, Mengmeng.(2017).Effects of aeration on matrix temperature by infrared thermal imager and computational fluid dynamics during sludge bio-drying.WATER RESEARCH,122(0),317-328. |
| MLA | Wang, Yawei,et al."Effects of aeration on matrix temperature by infrared thermal imager and computational fluid dynamics during sludge bio-drying".WATER RESEARCH 122.0(2017):317-328. |
入库方式： OAI收割
来源：生态环境研究中心
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