Polymer electrolyte membrane (PEM) fuel cells incorporating microchannels (D < 500μm) can benefit from improved fuel delivery and convective cooling. However, this requires a better understanding of two-phase microchannel transport phenomena, particularly liquid–gas interactions and liquid clogging in cathode air-delivery channels. This paper develops optical fluorescence imaging of water films in hydrophilic channels with varying air velocity and water injection rate. Micromachined silicon test structures with optical access and ...

Julie E Steinbrenner, Carlos H Hidrovo, Fu-Min Wang, Sebastien Vigneron, Eon Soo Lee, Theresa A Kramer, Ching-Hsiang Cheng, John K Eaton, Kenneth E Goodson

Publication date : 2007/7/31

Journal : Applied Thermal Engineering

Applied Thermal Engineering 27 (2007) 1722–1727