NDLI: Two-phase Flow in Fuel Cells in Short-term Microgravity Condition

Content Provider	Springer Nature Link
Author	Guo, Hang Zhao, Jian Fu Ye, Fang Wu, Feng Lv, Cui Ping Ma, Chong Fang
Copyright Year	2008
Abstract	A visual observation of liquid–gas two-phase flow in anode channels of a direct methanol proton exchange membrane fuel cells in microgravity has been carried out in a drop tower. The anode flow bed consisted of 2 manifolds and 11 parallel straight channels. The length, width and depth of single channel with rectangular cross section was 48.0 mm, 2.5 mm and 2.0 mm, respectively. The experimental results indicated that the size of bubbles in microgravity condition is bigger than that in normal gravity. The longer the time, the bigger the bubbles. The velocity of bubbles rising is slower than that in normal gravity because buoyancy lift is very weak in microgravity. The flow pattern in anode channels could change from bubbly flow in normal gravity to slug flow in microgravity. The gas slugs blocked supply of reactants from channels to anode catalyst layer through gas diffusion layer. When the weakened mass transfer causes concentration polarization, the output performance of fuel cells declines.
Starting Page	265
Ending Page	269
Page Count	5
File Format	PDF
ISSN	09380108
Journal	Microgravity Science and Technology
Volume Number	20
Issue Number	3-4
e-ISSN	18750494
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-06-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fuel cells Two-phase flow Microgravity Mechanics, Fluids, Thermodynamics Extraterrestrial Physics, Space Sciences Space Exploration and Astronautics
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Physics and Astronomy Engineering Modeling and Simulation

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