Two-phase hydrodynamics in a miniature direct methanol fuel cell |
| |
Authors: | Cullen R Buie Juan G Santiago |
| |
Affiliation: | aDepartment of Mechanical Engineering, Stanford University, 440 Escondido Mall, Building 530, Room 225, Stanford, CA 94305, USA |
| |
Abstract: | We present controlled experiments on a miniature direct methanol fuel cell (DMFC) to study the effects of methanol flow rate, current density, and void fraction on pressure drop across the DMFC anode. We also present an experimental technique to measure void fraction, liquid slug length, and velocity of the two-phase slug flow exiting the DMFC. For our channel geometry in which the diameter of the largest inscribed sphere (a) is 500 μm, pressure drop scales with the number of gas slugs in the channel, surface tension, and a. This scaling demonstrates the importance of capillary forces in determining the hydrodynamic characteristics of the DMFC anode. This work is aimed at aiding the design of fuel pumps and anode flow channels for miniature DMFC systems. |
| |
Keywords: | Methanol Fuel cell Two phase Pressure drop Microchannel |
本文献已被 ScienceDirect 等数据库收录! |
|