Two-Phase Lattice Boltzmann Simulations and In-Situ Measurements with X-ray CT Imaging on Liquid Water Transport in PEFCs

2011 ◽  
Author(s):  
Koji Moriyama ◽  
Furusawa Toru
Keyword(s):  
Water Transport ◽  
Liquid Water ◽  
Lattice Boltzmann ◽  
Ct Imaging ◽  
In Situ Measurements ◽  
Two Phase ◽  
X Ray ◽  
Lattice Boltzmann Simulations ◽  
Liquid Water Transport

In-Situ Observation of the Water Distribution in Porous Layers of PEMFCs by Soft X-Ray Radiography

2010 ◽  
Author(s):  
Takashi Sasabe ◽  
Shohji Tsushima ◽  
Shuichiro Hirai
Keyword(s):  
Water Transport ◽  
Temporal Resolution ◽  
Liquid Water ◽  
Water Distribution ◽  
Transport Phenomena ◽  
Catalyst Layer ◽  
In Situ Observation ◽  
X Ray ◽  
Porous Layers ◽  
Liquid Water Transport

To observe the liquid water distribution in porous layers of an operational Proton Exchange Membrane Fuel Cell (PEMFC) with high spatial and temporal resolution, Laboratory-based soft X-ray microscopy has developed. This system can generate low energy X-ray in the soft X-ray range, and maximum sensitivity towards water is achieved. A point X-ray source with a diameter of less than 1.0 μm and the improved detector optics contribute to realize a spatial resolution of 500 nm and a temporal resolution of 1.0 sec/frame. In addition, in-plane and through-plane observations of an operational PEMFC were carried out. In the in-plane observation test, non-uniform distribution of liquid water in the plane of the catalyst layer was observed, and the importance of appropriate design of the catalyst layer to liquid water transport phenomena was suggested. In the through-plane observation test, liquid water discharge behavior near under the rib area was observed, and the importance of channel wall wettability to liquid water transport phenomena was also suggested.

Soft X-ray visualization of the liquid water transport within the cracks of micro porous layer in PEMFC

2011 ◽  
Vol 13 (6) ◽  
pp. 638-641 ◽  
Author(s):  
Takashi Sasabe ◽  
Phengxay Deevanhxay ◽  
Shohji Tsushima ◽  
Shuichiro Hirai
Keyword(s):  
Water Transport ◽  
Porous Layer ◽  
Liquid Water ◽  
X Ray ◽  
Liquid Water Transport
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