Numerical prediction of humidification process in planar porous membrane humidifier of a PEM fuel cell system to evaluate the effects of operating and geometrical parameters |
| |
Authors: | Hashemi-Valikboni Seyed Zeynolaabedin Ajarostaghi Seyed Soheil Mousavi Delavar Mojtaba Aghajani Sedighi Kurosh |
| |
Institution: | 1.Department of Mechanical Engineering, Babol Noshirvani University of Technology, P.O. Box 484, Babol, Islamic Republic of Iran ;2.Department of Mechanical Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, QC, J1K 2R1, Canada ; |
| |
Abstract: | In present study, a numerical model is employed to investigate the effects of different operating parameters and channel geometry on the performance of membrane humidifier. Simulations are performed by a commercial CFD code and based on user defined functions. Three-dimensional counter-flow humidifier model for a gas-to-gas case is considered. Results show that an increase in porosity or permeability leads to better humidification. Moreover, increase in inlet temperature of dry and wet channels as well as inlet mass flowrate of water vapor would enhance humidifying process. On the other hand, by reduction in inlet mass flowrate of gas channel and thickness of the porous medium in membrane, better humidifier performance would be achieved. To investigate the geometric parameters, three different channel types including stepped, sinusoidal and zigzag are considered. It is found that stepped geometry has the best performance in humidifying.
|
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|