Yang, X., Ingham, D., Ma, L. et al. (2 more authors) (2017) Understanding the ash deposition formation in Zhundong lignite combustion through dynamic CFD modelling analysis. Fuel, 194. pp. 533-543. ISSN 1873-7153
Abstract
A dynamic CFD model, which is based on the inertia impaction, the thermophoresis and the direct alkali vapour condensation incorporating the influence of the heat transfer to the tube, has been developed for predicting the ash deposition formation in Zhundong lignite combustion in a pilot-scale furnace. The results show that particle deposition from the inertia impaction and the thermophoresis dictates the ash deposition formation under high furnace temperatures. The deposition caused by the direct alkali vapour condensation is less significant. As deposition time increases, particle impaction efficiency decreases and sticking efficiency increases due to the thermophoresis and the local temperature conditions, which result in the time-dependent behaviour of the deposition growth. In addition, the ash deposition characteristics are influenced under different furnace temperatures, due to the change in the particle impaction and sticking behaviours. Qualitative agreement is obtained between the predicted results and the measurements for the heat flux to the tube and the ash deposition growth.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | CFD; ash deposition; Zhundong lignite; deposition mechanisms; particle behaviours |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL (EPSRC) EP/M015351/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 17 Jan 2017 15:08 |
Last Modified: | 30 Jun 2023 09:09 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.fuel.2017.01.026 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110265 |