Study on heat transfer characteristics of air-cooled dry bottom ash removal system
This paper develops a numerical model to describe the bottom ash cooling process based on an actual power plant. By means of computational fluid dynamics, the influence of adjusting the operating parameters of the dry bottom ash removal system was investigated. The heat exchange enhancement effect a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-07-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23004094 |
| _version_ | 1797808428121325568 |
|---|---|
| author | Yonghua Li Zhi Fu Wei Wang Wenjie Liu |
| author_facet | Yonghua Li Zhi Fu Wei Wang Wenjie Liu |
| author_sort | Yonghua Li |
| collection | DOAJ |
| description | This paper develops a numerical model to describe the bottom ash cooling process based on an actual power plant. By means of computational fluid dynamics, the influence of adjusting the operating parameters of the dry bottom ash removal system was investigated. The heat exchange enhancement effect and the resulting consequences were comprehensively considered. After comparing its results with the measured values, the model is considered valid. The numerical results indicate that: increasing air volume is an effective method to reduce ash discharge temperature but not desirable; the ash discharge temperature decreased from 452.47 K to 446.27 K, but the air outlet temperature also decreased by 6.05 K. Increasing the running speed of the conveyor belt is an ideal measure; the heat recovery coefficient improves by 7.53% as the speed increases from 0.046 m/s to 0.0766 m/s. In addition, a dry bottom ash removal system with a specific structure has rated ash handling capacity; its design should fully consider the amount of bottom ash discharge. Adjusting the operating mode may not significantly reduce the ash discharge temperature without other losses. The results provide a reference for designing and adjusting subsequent bottom ash sensible heat utilization equipment. |
| first_indexed | 2024-03-13T06:37:21Z |
| format | Article |
| id | doaj.art-b1e9fc3754a94cd1b475a770866ec4c2 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-13T06:37:21Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-b1e9fc3754a94cd1b475a770866ec4c22023-06-09T04:28:07ZengElsevierCase Studies in Thermal Engineering2214-157X2023-07-0147103103Study on heat transfer characteristics of air-cooled dry bottom ash removal systemYonghua Li0Zhi Fu1Wei Wang2Wenjie Liu3Corresponding author.; School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, Hebei, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, Hebei, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, Hebei, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, Hebei, ChinaThis paper develops a numerical model to describe the bottom ash cooling process based on an actual power plant. By means of computational fluid dynamics, the influence of adjusting the operating parameters of the dry bottom ash removal system was investigated. The heat exchange enhancement effect and the resulting consequences were comprehensively considered. After comparing its results with the measured values, the model is considered valid. The numerical results indicate that: increasing air volume is an effective method to reduce ash discharge temperature but not desirable; the ash discharge temperature decreased from 452.47 K to 446.27 K, but the air outlet temperature also decreased by 6.05 K. Increasing the running speed of the conveyor belt is an ideal measure; the heat recovery coefficient improves by 7.53% as the speed increases from 0.046 m/s to 0.0766 m/s. In addition, a dry bottom ash removal system with a specific structure has rated ash handling capacity; its design should fully consider the amount of bottom ash discharge. Adjusting the operating mode may not significantly reduce the ash discharge temperature without other losses. The results provide a reference for designing and adjusting subsequent bottom ash sensible heat utilization equipment.http://www.sciencedirect.com/science/article/pii/S2214157X23004094dry bottom ash removal systemWaste heat recoveryNumerical modelingOperation adjustment |
| spellingShingle | Yonghua Li Zhi Fu Wei Wang Wenjie Liu Study on heat transfer characteristics of air-cooled dry bottom ash removal system Case Studies in Thermal Engineering dry bottom ash removal system Waste heat recovery Numerical modeling Operation adjustment |
| title | Study on heat transfer characteristics of air-cooled dry bottom ash removal system |
| title_full | Study on heat transfer characteristics of air-cooled dry bottom ash removal system |
| title_fullStr | Study on heat transfer characteristics of air-cooled dry bottom ash removal system |
| title_full_unstemmed | Study on heat transfer characteristics of air-cooled dry bottom ash removal system |
| title_short | Study on heat transfer characteristics of air-cooled dry bottom ash removal system |
| title_sort | study on heat transfer characteristics of air cooled dry bottom ash removal system |
| topic | dry bottom ash removal system Waste heat recovery Numerical modeling Operation adjustment |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23004094 |
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