The investigation on condensation performance of gas/steam mixtures with the fine coal particles in a vertical channel
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- 作者：Chengyi Guan ; Li Jia ; ljia@bjtu.edu.cn ; Liaofei Yin
- 关键词：Particle ; Condensation ; Heat transfer ; Surface tension
- 刊名：Applied Thermal Engineering
- 出版年：2017
- 出版时间：25 January 2017
- 年：2017
- 卷：111
- 期：Complete
- 页码：1470-1476
- 全文大小：1227 K
- 卷排序：111
文摘
Theoretical and experimental study is conducted to investigate the condensation heat transfer characteristics of mixed gas with fine coal particles in this paper. The visualization experiments of fine coal particles striking the film and mixed gas condensation heat transfer experiments in a vertical channel are carried out. Mixed gases contain different proportions of N2, steam and fine coal particles. The theoretical model of particles flicking condensate film is established. Results show that fine coal particles can penetrate the condensate film and flow inside the film when the particle diameter and the incidence velocity meet the conditions of penetrating judgment. The Nu number of heat transfer and the mass of the condensation decrease with the increase of the diameter and the concentration of the particles in the mixed gases.