Effects of particle sizes on performances of the horizontally buried-pipe steam generator using waste heat in a bioethanol steam reforming hydrogen production system

Author(s)
B. Zheng, H. Liu, J. Meng, P. Sun, X. Kong, Y. Liu, Y. Wang
Publisher
Elsevier
Source
International Journal of Hydrogen Energy
Keywords
Bioethanol steam reformieren, Horizontally buried-pipe steam generator, Hydrogen production, Particle size, Waste heat
Year
2019

The discrete element geometric model of the horizontally buried-pipe steam generator was set up. The effects of particle size (20 mm–80 mm) on performances of the horizontally buried-pipe steam generator using waste heat in a bioethanol steam reforming hydrogen production system was studied. When the particle size increases, the particle layer flatness decreases, the particle layer flow ununiformity increases. The volatility of the particle residence time distribution increases with the particle size increases, and the standard deviation of the particle residence time increases. When the particle size increases, the voidage of the particle system increases. So the particle thermal resistance in the steam generator increases with the particle size increases, the steam production of the generator decreases, and the system hydrogen production of decreases.

Keywords: Particle size, Horizontally buried-pipe steam generator, Bioethanol steam reformieren, Hydrogen production, Waste heat

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