A Computational Analysis of a Methanol Steam Reformer Using Phase Change Heat Transfer

Energies

Hyunjin Ji¹  Hyemin Song²  Younghyeon Kim²  Dongjin Yu²  ByoungJae Kim³  Sangseok Yu³ 

[1] Agency for Defense Development, Yuseong P.O.Box 35-44, Daejeon 305-600, Korea;Mechanical Engineering, Graduate School, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea;School of Mechanical Engineering, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea;

关键词: computational analysis;    high-pressure methanol steam reformer;    phase change heat transfer;    high pressure steam condensation;    hydrogen production;   

DOI  :  10.3390/en13174324

来源: DOAJ

【 摘 要 】

A methanol steam reformer converts methanol and steam into a hydrogen-rich mixture through an endothermic reaction. The methanol reformer is divided into a reaction section and a heat supply section that transfers thermal energy from 200 to 300 °C. This study presents the behavior of the methanol steam reforming reaction using the latent heat of the steam. A numerical analysis was separately conducted for two different regimes assuming constant heat flux conditions. A methanol steam reformer is an annulus structure that has a phase change heat transfer from an outer tube to an inner tube. Different from the steam zone temperature in the tube, the latent heat of steam condensation decreases, and there is a gradual between-wall temperature decrease along the longitudinal direction. Since the latent heat of steam condensation is very sensitive to the requested heat from the reformer, it is necessary to consider a refined design of a methanol reformer to obtain a large enough amount of heat by steam condensation.

【 授权许可】

Unknown