Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.fuel.2019.116083
Title: Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique
Authors: Zhimin Zheng 
Wenming Yang 
Peng Yu
Yongtie Cai 
Hao Zhou
Siah Keng Boon
Prabakaran Subbaiah
Keywords: Ash deposition
CFD
Dynamic mesh
Slagging
Zhundong coal
Issue Date: 1-Jan-2020
Citation: Zhimin Zheng, Wenming Yang, Peng Yu, Yongtie Cai, Hao Zhou, Siah Keng Boon, Prabakaran Subbaiah (2020-01-01). Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique. Fuel 259 : 116083. ScholarBank@NUS Repository. https://doi.org/10.1016/j.fuel.2019.116083
Abstract: Ash deposition on heat transfer surfaces is still a significant problem in existing conventional utility boilers. Understanding the formation of ash deposit is thereby very important, which is helpful to optimize the design and operation procedure of boilers. In this study, a dynamic numerical method based on the commercial software ANSYS FLUENT was developed to predict the growth of ash deposit on the deposition probe in a 300 kW slagging test furnace fired with Zhundong coal. Based on the CFD dynamic mesh technique, both shape variations and surface temperature variations of ash deposit with time were predicted. Time-dependent deposition behaviors on the deposition probe with different initial metal wall temperatures were presented. The simulation results (e.g. thickness, heat flux, surface temperature, and shape of ash deposit) are in good agreement with the experimental data. It shows that increased surface temperature of ash deposit can significantly increase ash deposition mass. It was also determined that the shape variation of ash deposit can obviously reduce the impact mass and deposition mass during ash deposition by the comparative studies. The developed simulation method is proved to be a useful tool to predict ash deposition behavior with more detailed information. © 2019 Elsevier Ltd
Source Title: Fuel
URI: https://scholarbank.nus.edu.sg/handle/10635/168199
ISSN: 0016-2361
1873-7153
DOI: 10.1016/j.fuel.2019.116083
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