Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique

Zheng, Zhimin1,2; Yang, Wenming1,2; Yu, Peng3; Cai, Yongtie1,2; Zhou, Hao4; Boon, Siah Keng5; Subbaiah, Prabakaran5

2020-01

10.1016/j.fuel.2019.116083

FUEL   影响因子和分区

0016-2361

1873-7153

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.

Ash deposition CFD Zhundong coal Slagging Dynamic mesh

SCI ; EI

英语

通讯

National Research Foundation Singapore[] ; National University of Singapore[]

Energy & Fuels ; Engineering

Energy & Fuels ; Engineering, Chemical

WOS:000489332600080

ELSEVIER SCI LTD

20194007486516

Atmospheric temperature ; Boilers ; Computational fluid dynamics ; Deposits ; Heat exchangers ; Heat flux ; Heat transfer ; Mesh generation ; Numerical methods ; Probes ; Software testing ; Surface properties

Atmospheric Properties:443.1 ; Mines and Mining, Coal:503 ; Steam Power Plants:614 ; Heat Exchange Equipment and Components:616.1 ; Heat Transfer:641.2 ; Computer Applications:723.5 ; Numerical Methods:921.6 ; Materials Science:951

ENGINEERING

Web of Science

1.Sembcorp NUS Corp Lab, Block E1A,04-01,1 Engn Dr 2, Singapore 117576, Singapore
2.Natl Univ Singapore, Dept Mech Engn, Block EA,07-08,9 Engn Dr, Singapore 117575, Singapore
3.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China
4.Zhejiang Univ, Inst Thermal Power Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China
5.Sembcorp Ind Ltd, 30 Hill St,05-04, Singapore 179360, Singapore

Zheng, Zhimin,Yang, Wenming,Yu, Peng,et al. Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique[J]. FUEL,2020,259.

Zheng, Zhimin.,Yang, Wenming.,Yu, Peng.,Cai, Yongtie.,Zhou, Hao.,...&Subbaiah, Prabakaran.(2020).Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique.FUEL,259.

Zheng, Zhimin,et al."Simulating growth of ash deposit in boiler heat exchanger tube based on CFD dynamic mesh technique".FUEL 259(2020).